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Liquid Crystalline Polymers Containing Mesogenic Units Based On Half Disc And Rod Like Moieties 5 Side Chain Liquid Crystalline Polymethylsiloxanes Containing Hemiphasmidic Mesogens Based On 4 345 Trisalkan 1 Yloxy Benzoyloxy 4 P Propan L Yloxybenzoyloxybiphenyl Groups
Download Liquid Crystalline Polymers Containing Mesogenic Units Based On Half Disc And Rod Like Moieties 5 Side Chain Liquid Crystalline Polymethylsiloxanes Containing Hemiphasmidic Mesogens Based On 4 345 Trisalkan 1 Yloxy Benzoyloxy 4 P Propan L Yloxybenzoyloxybiphenyl Groups full books in PDF, epub, and Kindle. Read online Liquid Crystalline Polymers Containing Mesogenic Units Based On Half Disc And Rod Like Moieties 5 Side Chain Liquid Crystalline Polymethylsiloxanes Containing Hemiphasmidic Mesogens Based On 4 345 Trisalkan 1 Yloxy Benzoyloxy 4 P Propan L Yloxybenzoyloxybiphenyl Groups ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Liquid Crystalline Polymers Containing Mesogenic Units Based on Half- Disc and Rod-Like Moieties. 5. Side Chain Liquid Crystalline Polymethylsiloxanes Containing Hemiphasmidic Mesogens Based on 4-(3,4,5-Tris(alkan-1-yloxy) Benzoyloxy)-4-(p-(propan-l-yloxy)benzoyloxy)biphenyl Groups by :
Download or read book Liquid Crystalline Polymers Containing Mesogenic Units Based on Half- Disc and Rod-Like Moieties. 5. Side Chain Liquid Crystalline Polymethylsiloxanes Containing Hemiphasmidic Mesogens Based on 4-(3,4,5-Tris(alkan-1-yloxy) Benzoyloxy)-4-(p-(propan-l-yloxy)benzoyloxy)biphenyl Groups written by and published by . This book was released on 1991 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: The synthesis of hemiphasmidic monomers 4-(3,4,5-tris(S( - )-2- methylbutan-1-yloxybenzoyloxy -4'-(p-allyloxybenzoyloxy)biphenyl (4), 4-3,4,5- tris(n-pentan-1-yloxy)benzoyloxy-4'-(p-allyloxybenzoyloxy)biphenyl (15), and 4- (3,4,5-tris(n-dodecan-1-yloxy) benzoyloxy-4'-(p-allyloxybenzoyloxy) biphenyl (16) and of the corresponding polymethylsiloxanes (17,18, and 19) is described. Both monomers and polymers were characterized by a combination of differential scanning calorimetry (DSC), WAXS, SAXS, and thermal optical polarized microscopy. 15, 16, and 17 are crystalline. 17 exhibits an enantiotropic double layer smectic A or C mesophase. 18 displays a monotropic columnar hexagonal and an enantiotropic double layer smectic A or C mesophases. Due to its close proximity to the glass transition temperature, the columnar hexagonal phase of 18 is strongly kinetically controlled. 19 exhibits a very broad enantiotropic hexagonal columnar mesophase. The columns of the mesophases of 18 and 19 are generated by an elongated polymer backbone penetrating through the center of the column and tapered extended mesogens radiating out of it.
Book Synopsis Liquid Crystalline Polymers Containing Heterocycloalkane Mesogens. 1. Side-Chain Liquid Crystalline Polymethacrylates and Polycrylates Containing 2,5-Disubstituted-1,3-Dioxane Mesogens by : C. S. Hsu
Download or read book Liquid Crystalline Polymers Containing Heterocycloalkane Mesogens. 1. Side-Chain Liquid Crystalline Polymethacrylates and Polycrylates Containing 2,5-Disubstituted-1,3-Dioxane Mesogens written by C. S. Hsu and published by . This book was released on 1986 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymethacrylates and polyacrylates containing 2-(p-hydroxphenyl)-5-(p-methoxyphenyl)-1-, 3-dioxane as a mesogenic unit and an aliphatic spacer containing eleven methylene units were synthesized. Their phase behavior was studied by differential scanning calorimetry and optical polarization microscopy, and compared with the phase behavior of the corresponding polymethacrylates and polyacrylates based on 4-methoxy-4'-hydroxbiphenyl mesogen. All polymers present smectic mesomorphism. The 2,5-disubstituted-1,3-dioxane mesogen resembles a terphenyl mesogen in which the internal phenyl ring was hydrogenated. Even so, when compared with the biphenyl containing polymers, the glass transition temperatures of the 1,3-dioxane containing polymers are lower, although their isotropization occurs at higher temperatures. Keywords: Side-chain thermotropic liquid crystalline polymers.
Book Synopsis Liquid Crystalline Polymers Containing Heterocycloalkane Mesogens. 2. Side-Chain Liquid Crystalline Polysiloxanes Containing 2,5-Disubstituted-1,3-Dioxane Mesogens by : C. S. Hsu
Download or read book Liquid Crystalline Polymers Containing Heterocycloalkane Mesogens. 2. Side-Chain Liquid Crystalline Polysiloxanes Containing 2,5-Disubstituted-1,3-Dioxane Mesogens written by C. S. Hsu and published by . This book was released on 1986 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polysiloxanes and copolysiloxanes containing 2-(p-hydroxyphenyl)-5-(p-methoxyphenyl)-1,3-dioxane and 5-(p-methoxyphenyl)-1,3-dioxan-2-yl as mesogenic units and an aliphatic spacer containing eleven and respectively, ten methylene units were synthesized. Their phase behavior was studied by differential scanning calorimetry and optical polarization microscopy, and compared with the phase behavior of the polysiloxanes and copolysiloxanes containing 4-meth-oxy-4'-hydroxybiphenyl and 4-cyano-4'-hydroxybiphenyl mesogens attached to the polymer backbone through an aliphatic spacer containing eleven methylene units. All synthesized polymers present smectic mesomorphism. The polymers containing 4-methoxy-4'-hydroxybiphenyl and 4-cyano-4'-hydroxybephenyl are also crystalline, while the polymers containing 1,3-dioxane based mesogens do not crystallize.
Book Synopsis Side Chain Liquid Crystal Polymers by : C.B. McArdle
Download or read book Side Chain Liquid Crystal Polymers written by C.B. McArdle and published by Springer Science & Business Media. This book was released on 1990-04-30 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Liquid Crystalline and Mesomorphic Polymers by : Valery P. Shibaev
Download or read book Liquid Crystalline and Mesomorphic Polymers written by Valery P. Shibaev and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: Among the various new directions in modern polymer science, the design and investigation of liquid crystal (LC) polymers have been the ones growing most actively and fruitfully. In spite of that, the possible formation of an anisotropic LC phase was only demonstrated theoretically for the first time in the 1950s by Onsager [1] and Flory [2], and then experimentally verified in the studies with polypeptides solutions. In essence, the studies of these LC lyotropic systems did not deviate from the theme of purely academic interest. It was at the beginning of the 1970s that the experimental "explosion" occurred, when aromatic polyamides were synthesized and their ability to form LC solutions in certain very aggressive solvents was discovered. The search for practical applications of such LC systems was crowned with the successful creation of the new generation of ultrastrong high-modulus ther mostable fibers, such as the Kevlar, due to the high degree of order of the macromolecules in the anisotropic LC state. In fact, these investigations coincided with the swift emergence on the practical "scene" of thermotropic low-molar-mass liquid crystals, with the use of these materials in microelectronics and electro optics (figures and let ters indicators, displays in personal computers, and flat TV, etc.). Polymer scientists also began to develop methods of synthesizing thermotropic LC polymers by incorporating mesogenic fragments in the main (main-chain LC polymers) or side branchings of the macromolecules (side-chain or comb shaped polymers).
Author :Division on Engineering and Physical Sciences Publisher :National Academies Press ISBN 13 :0309042313 Total Pages :121 pages Book Rating :4.3/5 (9 download)
Book Synopsis Liquid Crystalline Polymers by : Division on Engineering and Physical Sciences
Download or read book Liquid Crystalline Polymers written by Division on Engineering and Physical Sciences and published by National Academies Press. This book was released on 1990-02-01 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Liquid Crystal Polymers: From Structures to Applications by : A.A. Collyer
Download or read book Liquid Crystal Polymers: From Structures to Applications written by A.A. Collyer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: The subject of liquid crystals and their use in electronic displays and in non-linear optical systems has become of tremendous importance during the last decade; and the incorporation of liquid crystal units into polymeric materials has led to a group of new materials with diverse properties. Some of these properties have been utilized in new products and some have yet to be used. Much published work has appeared that deals with specific materials or particular applications, and it was felt that a book was needed to examine and explain the underlying principles governing the diverse properties of these liquid crystal polymers, LCPs. The current work describes the diverse nature of LCPs, their synthesis, characterization, properties and finally their applications. It describes the manner in which liquid crystallinity or mesomorphism occurs in small molecules, monomer liquid crystals and polymer liquid crystals. Chapter 1 gives a classification of the various ways in which the meso gens may be connected to the polymer chains. Currently, the bulk of LCP material is based on main chain or longitudinal LCPs for use in engineering applications. The side chain or comb polymers are intended for use in electronics and opto-electronic systems and as surfactants. Many other variants and possibilities exist but their properties have not yet been fully studied or used. In this respect it is hoped that the current work will indicate future possibilities as well as discussing current opinion. v Preface vi Chapters 2 and 3 describe methods of characterizing the mesophases.
Book Synopsis Liquid Crystalline Polymers by : Vijay Kumar Thakur
Download or read book Liquid Crystalline Polymers written by Vijay Kumar Thakur and published by Springer. This book was released on 2015-11-16 with total page 627 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces anisotropic innovations in liquid crystalline polymers as well as new nanocomposite materials and testing techniques. The authors detail the newest discoveries of material properties, material types and phases, and material characterization. This interdisciplinary work creates valuable links that strengthen the approach to the evolving field of liquid crystalline polymers/ materials.
Book Synopsis Liquid Crystalline Polymers Containing Heterocycloalkane Mesogens, Biphasic Side-Chain Liquid Crystalline Polysiloxanes Containing Trans 5-n-undecanyl-2-(4-cyanophenyl)-1,3-Dioxane Side Groups by : Chain S. Hsu
Download or read book Liquid Crystalline Polymers Containing Heterocycloalkane Mesogens, Biphasic Side-Chain Liquid Crystalline Polysiloxanes Containing Trans 5-n-undecanyl-2-(4-cyanophenyl)-1,3-Dioxane Side Groups written by Chain S. Hsu and published by . This book was released on 1987 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polysiloxanes and copolysiloxanes containing the trans 5-(n-undecanyl)-2-(4-cyanophenyl)-1,3-dioxane side group as mesogen were synthesized. Their phase behavior was studied by differential scanning calorimetry and optical polarization microscopy. Homopolymers containing the mesogen and a copolymer containing 33% of the mesogen showed smectic mesomorphism. The copolymers containing the mesogen showed two well defined Tg and thus present strong evidence for a phase separated morphology.
Book Synopsis Liquid Crystal Polymers by : D. Coates
Download or read book Liquid Crystal Polymers written by D. Coates and published by iSmithers Rapra Publishing. This book was released on 2000 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Liquid crystal polymers (LCPs) have a wide range of uses, from strong engineering plastics to delicate gels for use in liquid crystal (LC) displays. For this reason, it is essential reading for materials scientists, engineers or technologists in industry, as well as research laboratories or academia. An additional indexed section containing several hundred abstracts from the Rapra Polymer Library database gives useful references for further reading.
Book Synopsis Synthesis and Characterization of Poly(methylsiloxane)s Containing 5-(S( - )-2-Methyl-1-Butyl)-2-(4-(11-Undecan-1-Yloxy)Phenyl)-1,3,2-Dioxaborinane and 2-(4-(S( - )-2-Methyl-1-Butoxy)Phenyl)-5-(11-Undecan-1-Yl)-1,3,2-Dioxaborinane Constitutional Isomeric Side Groups by : V. Percec
Download or read book Synthesis and Characterization of Poly(methylsiloxane)s Containing 5-(S( - )-2-Methyl-1-Butyl)-2-(4-(11-Undecan-1-Yloxy)Phenyl)-1,3,2-Dioxaborinane and 2-(4-(S( - )-2-Methyl-1-Butoxy)Phenyl)-5-(11-Undecan-1-Yl)-1,3,2-Dioxaborinane Constitutional Isomeric Side Groups written by V. Percec and published by . This book was released on 1991 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Previous publications from our laboratory reported the results of our investigations on the molecular engineering of phase transitions of side chain liquid crystalline polymers by using constitutional isomers of rigid rod-like mesogenic groups. Homopolymers based on constitutional isomeric rigid rod-like mesogens exhibit almost identical phase behavior. However, since their structural units are isomorphic within their mesophase and nonisomorphic within their crystalline phase, copolymers based on constitutional isomeric mesogens exhibit an isotropization temperature which is about the weight averaged value of their homopolymers and a highly depressed melting transition temperature. Consequently, copolymerization of these constitutional isomeric mesogens can be used to transform virtual or monotropic mesophases into enantiotropic mesophases. In a previous publication we have reported that isotropization temperatures of homopolymers containing constitutional isomeric mesogens based on a combination of rigid rod-like and flexible moieties are highly different.
Book Synopsis Liquid Crystalline Polymers Containing Heterocycloalkane Mesogenic Groups. 6. Liquid Crystalline Polymethacrylates and Polyacrylates of Trans 2-(4-Hydroxyundecanyloxy)-3,5-Dimethylphenyl)-5-(4-Methoxyphenyl)-1,3-Dioxane by : Chain S. Hsu
Download or read book Liquid Crystalline Polymers Containing Heterocycloalkane Mesogenic Groups. 6. Liquid Crystalline Polymethacrylates and Polyacrylates of Trans 2-(4-Hydroxyundecanyloxy)-3,5-Dimethylphenyl)-5-(4-Methoxyphenyl)-1,3-Dioxane written by Chain S. Hsu and published by . This book was released on 1987 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The synthesis and characterization of polymethacrylate and polyacrylate of trans 2-(4-(11-(hydroxyundecanyloxy-3, 5-dimethylphenyl)-5-(4-methoxyphenyl)-1,3-dioxane is presented. Both polymers exhibit nematic mesophases and do not present side-chain crystallization. At temperatures higher than 160 C the 1,3-dioxane-2,5-diyl groups undergo a thermally induced trans-cis isomerization. A radical mechanism was proposed for this isomerization. Keywords: Polyacrylates.
Book Synopsis Liquid Crystalline Polymers by : Vijay Kumar Thakur
Download or read book Liquid Crystalline Polymers written by Vijay Kumar Thakur and published by Springer. This book was released on 2015-08-25 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces various applications of liquid crystalline polymers as the emerging new class of high performance novel materials. The authors detail the advantageous properties of these LCs including optical anisotropic, transparency and easy control over structure. This interdisciplinary work includes valuable input from international projects with special focus on the use of liquid crystalline polymers and/or nanocomposites.
Book Synopsis Liquid Crystalline Polymers Containing Heterocycloalkane Mesogens. 4. Biphasic Side-Chain Liquid Crystalline Polysiloxanes Containing Trans 5-(n-Undecanyl)-2-(4-Methoxyphenyl)-1,3-Dioxane and Trans 2-(n-Decanyl)-5-(4-Methoxyphenyl)-1,3-Dioxane Mesogens by : Chain S. Hsu
Download or read book Liquid Crystalline Polymers Containing Heterocycloalkane Mesogens. 4. Biphasic Side-Chain Liquid Crystalline Polysiloxanes Containing Trans 5-(n-Undecanyl)-2-(4-Methoxyphenyl)-1,3-Dioxane and Trans 2-(n-Decanyl)-5-(4-Methoxyphenyl)-1,3-Dioxane Mesogens written by Chain S. Hsu and published by . This book was released on 1986 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: The synthesis and characterization of side-chain liquid crystalline polysiloxanes and copolysiloxanes containing trans 5-(n-undecanyl)-2-(4-methoxyphenyl)-1,3-dioxane and respectively trans 2-(n-decanyl)-5-(4-methoxyphenyl)-1-3-dioxane side groups is presented. In most cases the resulting polymers exhibit two glass transition temperatures, i.e., one due to the independent motion of the main chain, and the other due to the independent but cooperative motion of the side chains.
Book Synopsis Liquid-Crystal Polymers by : N.A. Platé
Download or read book Liquid-Crystal Polymers written by N.A. Platé and published by Springer Science & Business Media. This book was released on 1993-01-31 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drawing a picture of the current situation of this new field, this volume both summarizes the past achievements and analyzes the present unsolved problems.
Book Synopsis Liquid Crystalline Copolymers of Monomer-Pairs Containing Mesogenic Units Which Exhibit Constitutional Isomerism by : Virgil Percec
Download or read book Liquid Crystalline Copolymers of Monomer-Pairs Containing Mesogenic Units Which Exhibit Constitutional Isomerism written by Virgil Percec and published by . This book was released on 1987 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: The synthesis and characterization of side-chain liquid crystalline copolymers obtained from a monomer pair containing a mesogenic unit which exhibits constitutional isomerism are presented. The particular example described refers to copolymethacrylates obtained from 4-hydroxy-4'-methoxy-alpha-methylstilbene and 4-methoxy-4'-hydroxy-alpha-methylstilbene containing six methylenic units presents a nematic mesophase, while the polymer containing eleven methylenic units presents a smectic A or C mesophase. None of these polymers exhibited side-chain crystallization.
Book Synopsis Recent Advances in Liquid Crystalline Polymers by : L. L. Chapoy
Download or read book Recent Advances in Liquid Crystalline Polymers written by L. L. Chapoy and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains an eclectic collection of 22 papers on liquid crystalline polymers presented at the Sixth Polymer Workshop, in the series sponsored by the European Science Foundation, entitled: 'Liquid Crystal Polymer Systems', in Gentofte, Denmark, 12-14 September 1983. Since a contribution to this volume was strictly voluntary, and in some cases represents a considerably expanded version of that which was presented, it is strictly speaking not correct to term this a 'proceedings'. A description of the aims and purposes of the European Science Foundation with respect to the polymer area has been presented in: Shell Polymers, Vol. 5, No.2, pp. 34-35, 1981. The papers given here represent a cross-section of current research interests in liquid crystalline polymers in the areas of theory, synthesis, characterization, structure-property relationships and applications. At least some of the current interest is motivated by attempts to practically exploit the novel properties of these materials in the developing tech nologies of high strength fibres and advanced materials for constructional purposes, but also for functional materials in the areas of information retrieval, electronics and opto-electronics applications. The editor wishes to thank all those involved for their courtesy and co-operation.
