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Author : Philip Gordon Hampton
Publisher :
ISBN 13 :
Total Pages : 396 pages
Book Rating : 4.:/5 (4 download)
Download or read book Dynamic Mechanical Properties of Network Polymers written by Philip Gordon Hampton and published by . This book was released on 1977 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : A. Chompff
Publisher : Springer Science & Business Media
ISBN 13 : 1475762100
Total Pages : 494 pages
Book Rating : 4.4/5 (757 download)
Download or read book Polymer Networks written by A. Chompff and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: For several decades, polymer science has sought to rationalize the mechanical and thermodynamic properties of polymer networks largely within the framework of statistical thermodynamics. Much of this effort has been directed toward the rubbery rather than the glassy state. It is generally assumed that networks possess an av erage composition to which average properties may be assigned; from such a continuum view, a powerful analysis of such properties as modulus, swelling, birefringence and thermoelasticity has emerged. In the years following the rise of polymer characterization (the late 40's and early 50's), many scientists began to study ap parent relations between the properties of linear polymer molecules and the networks obtainable therefrom. This search was also stimu lated by the wide range of applications of polymer networks in com mercial elastomers, thermosets and coatings. Frequently, these data were confidently matched with curves obtained from statisti cally describable models of networks of ghost chains, uniformly distributed in space. More recently, it has become apparent that polymer chains in networks are not as ideal as assumed in the formulation of statis tical models, and there has been a shift in emphasis towards the less than ideal, perturbed and possibly inhomogeneous networks which are more frequently encountered in practice. The continuum approach, however, had to be developed before inhomogeneous systems could be described; the present volume, therefore, contains both views.
Author : Sabu Thomas
Publisher : Elsevier
ISBN 13 : 0128040858
Total Pages : 440 pages
Book Rating : 4.1/5 (28 download)
Download or read book Polyurethane Polymers: Blends and Interpenetrating Polymer Networks written by Sabu Thomas and published by Elsevier. This book was released on 2017-08-15 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyurethane Polymers: Blends and Interpenetrating Networks deals with almost all aspects of blends and IPNs formed by polyurethane, including the thermal, mechanical, morphological, and viscoelastic properties of each blend presented in the book. In addition, major applications related to these blends and IPNs are mentioned. - Provides an elaborate coverage of the chemistry of polyurethane, including its synthesis and properties - Includes available characterization techniques - Relates types of polyurethanes to their potential properties - Discusses blends options
Author : Stephen Davis Severson
Publisher :
ISBN 13 :
Total Pages : 322 pages
Book Rating : 4.:/5 (272 download)
Download or read book Dynamic Mechanical Properties of Poly(dimethylsiloxane) Networks Crosslinked at Varied Degrees of Dilution written by Stephen Davis Severson and published by . This book was released on 1976 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Lawrence E. Nielsen
Publisher :
ISBN 13 :
Total Pages : 296 pages
Book Rating : 4.3/5 (91 download)
Download or read book Mechanical Properties of Polymers written by Lawrence E. Nielsen and published by . This book was released on 1962 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kurt C. Frisch
Publisher : CRC Press
ISBN 13 : 9780877627258
Total Pages : 292 pages
Book Rating : 4.6/5 (272 download)
Download or read book Advances in Interpenetrating Polymer Networks written by Kurt C. Frisch and published by CRC Press. This book was released on 1991-06-21 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the third volume of Advances in IPNs. Research and development on interpenetrating polymer networks (IPNs) continues to increase at an accelerated pace. the number of publications, patents and symposia worldwide testify to this growth of this important field of polymers. Including a collection of industrial applications of IONs, ranging from new types of adhesives, coatings, elastomers and plastics to composites, RIM and medical applications.
Author : American Chemical Society
Publisher :
ISBN 13 : 9780608054605
Total Pages : 507 pages
Book Rating : 4.0/5 (546 download)
Download or read book Polymer Networks written by American Chemical Society and published by . This book was released on 1971 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jacob Mathew
Publisher :
ISBN 13 :
Total Pages : 200 pages
Book Rating : 4.:/5 (35 download)
Download or read book Low Temperature Dynamic Mechanical Properties of Crosslinked Polymers written by Jacob Mathew and published by . This book was released on 1976 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Rajendra Kumar Mehta
Publisher :
ISBN 13 :
Total Pages : 354 pages
Book Rating : 4.:/5 (793 download)
Download or read book Dynamic Mechanical Behavior of Amorphous Polymer Networks written by Rajendra Kumar Mehta and published by . This book was released on 1980 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Shu-de Rong
Publisher :
ISBN 13 :
Total Pages : 214 pages
Book Rating : 4.:/5 (219 download)
Download or read book The Study of Dynamic Mechanical Properties of Polymers in the Form of Fibers written by Shu-de Rong and published by . This book was released on 1982 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Junzhe Lou
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (111 download)
Download or read book Design and Understanding of Dynamic Polymer Networks and Polyelectrolyte Complexes written by Junzhe Lou and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Rational design of hydrogels and charged polymers is important for understanding the underlying principles that govern complex mechanical and phase behaviors of biomacromolecular systems. Mimicking and capturing such behaviors in synthetic polymer systems are highly desired for many biomedical and technical applications. Biological tissues exhibit complex dynamic mechanical properties. To capture and control dynamics in synthetic hydrogel scaffolds, I developed a hyaluronic acid (HA)-based dynamic hydrogel system crosslinked by dynamic covalent hydrazone bonds. The HA hydrogels and collagen I generated an interpenetrating network, which exhibited both well-controlled mechanical tunability and fibrillarity, thus providing an adaptable platform to study the cell-matrix interactions. A biocompatible catalyst that accelerates the exchange of hydrazones was then incorporated into the HA-hydrazone hydrogel to modulate the dynamics of crosslinks without affecting network structures. This approach was used to develop injectable hydrogels for cell delivery with high injectability and stability enabled by temporal catalyst controlled hydrogel dynamics. The catalyst control of network dynamics also enabled quantitative and unambiguous correlation between the network parameters and mechanical properties of dynamic polymer networks. In the second part, I investigated the fundamental study on liquid-like polyelectrolyte complexes (PECs) formed by oppositely charged polyelectrolytes. PECs are important in biological systems for membraneless compartments, however the understanding of the mechanism and structure-property relationship is limited. I developed a series of well-defined polymers with tunable structural parameters to modulate the microenvironment of PECs and clearly revealed the importance of local polarity and polyelectrolyte composition on PECs.
Author : Raymond George Saba
Publisher :
ISBN 13 :
Total Pages : 92 pages
Book Rating : 4.:/5 (793 download)
Download or read book Dynamic Mechanical Properties of Some High Polymers written by Raymond George Saba and published by . This book was released on with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Shengchang Tang (Ph. D.)
Publisher :
ISBN 13 :
Total Pages : 385 pages
Book Rating : 4.:/5 (976 download)
Download or read book Dynamics and Mechanics of Associating Polymer Networks written by Shengchang Tang (Ph. D.) and published by . This book was released on 2016 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: Associating polymers have attracted much interest in a variety of applications such as selfhealing materials, biomaterials, rheological modifiers, and actuators. The interplay of polymer topology and sticker chemistry presents significant challenges in understanding the physics of associating polymers across a wide range of time and length scales. This thesis aims to provide new insights into the structure-dynamics-mechanics relationships of associating polymer networks. This thesis first examines diffusion of various types of associating polymers in the gel state through a combination of experiment and theory. By using forced Rayleigh scattering (FRS), phenomenological super-diffusion is revealed as a general feature in associating networks. Experimental findings are quantitatively explained by a simple two-state model that accounts for the interplay of chain diffusion and the dynamic association-dissociation equilibrium of polymer chains with surrounding network. Furthermore, hindered self-diffusion is shown to directly correlate with a deviation from the Maxwellian behavior in materials rheological response on the long time scale. To further understand how sticker dynamics affects the network mechanical properties, a new method referred to as "sticker diffusion and dissociation spectrometry" is developed to quantify the dissociation rate of stickers in the network junctions. It is demonstrated that sticker dissociation is a prerequisite step for sticker exchange that leads to macroscopic stress relaxation. Finally, this thesis explores the use of fluorescence recovery after photobleaching (FRAP) to measure self-diffusion of associating polymers, and a mathematical framework is established. The second part of this thesis focuses on the development of new methods of controlling the mechanical properties of associating networks through engineering the molecular structure of polymer chains. Specifically, topological entanglement is introduced into the network through extending the polymer chains to reach beyond their entanglement threshold. This strategy drastically enhances material's toughness, extensibility, creep resistance and stability in solutions. Various types of coupling chemistries are then explored to fine tune the extent of entanglement. The entanglement effect and the long-time relaxation of materials can be further controlled by introducing branching points into the macromolecules.
Author : Daniel Klempner
Publisher : CRC Press
ISBN 13 :
Total Pages : 350 pages
Book Rating : 4.3/5 (91 download)
Download or read book Advances in Interpenetrating Polymer Networks, Volume I written by Daniel Klempner and published by CRC Press. This book was released on 1989-11-03 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kurt C. Frisch
Publisher : CRC Press
ISBN 13 : 9780877627081
Total Pages : 334 pages
Book Rating : 4.6/5 (27 download)
Download or read book Advances in Interpenetrating Polymer Networks written by Kurt C. Frisch and published by CRC Press. This book was released on 1990-07-10 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Dilip Keshva Joshi
Publisher :
ISBN 13 :
Total Pages : 496 pages
Book Rating : 4.:/5 (14 download)
Download or read book Relationship Between Dynamic Mechanical Properties and the Degree of Molecular Orientation in Semi-crystalline Polymers written by Dilip Keshva Joshi and published by . This book was released on 1975 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jiahui Li
Publisher :
ISBN 13 :
Total Pages : 380 pages
Book Rating : 4.:/5 (759 download)
Download or read book Polymer Networks Containing Reversibly Associating Side-groups written by Jiahui Li and published by . This book was released on 2011 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Supramolecular polymers consist of low molar mass subunits that non-covalently bind together through hydrogen bonding or other non-covalent interactions, forming macromolecular assemblies. Site-specific and reversible hydrogen bonds and other non-covalent interactions are increasingly employed to modify bulk polymer properties, enabling thermoplastic elastomers and self-healing polymers. In this thesis, I investigate how hydrogen bonding groups directly bonded onto an elastic polymer network affect material properties. A lightly crosslinked covalent network containing hydrogen bonding side-groups (ureidopyrimidinone, UPy) was synthesized. This architecture results in a novel shape-memory effect, and the molecular events resulting in this behavior were deduced. Further, to systematically evaluate how thermomechanical properties are related to network architecture, a new photo-crosslinking route was developed to prepare shape-memory elastomers. This method enables melt-processing of shape-memory elastomers into complex permanent shapes, and samples can be prepared with much higher UPy-content. Furthermore, the covalent and non-covalent crosslink density can be accurately controlled. Dynamic mechanical analysis on photo-crosslinked shape-memory elastomers revealed that dynamic crosslinks behave nearly as effectively as permanent crosslinks below the UPy hydrogen bond transition. Compared to linear polymers bearing identical hydrogen bonding groups, the synthesized dynamic networks exhibit an enhanced temperature dependence of mechanical properties. This indicates that the covalent network supports cooperative hydrogen bonding. This finding will guide researchers to more effectively employ non-covalent interactions within bulk polymer materials. Mass transport through dynamic networks was also studied using multi-photon fluorescence recovery after photobleaching (MP-FRAP). In contrast to viscous relaxation, small molecule mass transport through the dynamic networks is limited by the density of hydrogen bonds instead of their exchange rate"--Leaves vii-viii.
