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Synthesis And Characterization Of Dimethylbismuth And Indium Phenoxy Imine Complexes As Potential Catalysts For The Ring Opening Polymerization Of Cyclic Esters
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Book Synopsis Synthesis and Characterization of Dimethylbismuth and -indium Phenoxy-imine Complexes as Potential Catalysts for the Ring Opening Polymerization of Cyclic Esters by : Kathleen Morrison
Download or read book Synthesis and Characterization of Dimethylbismuth and -indium Phenoxy-imine Complexes as Potential Catalysts for the Ring Opening Polymerization of Cyclic Esters written by Kathleen Morrison and published by . This book was released on 2019 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Synthesis and Characterization of Methylbismuth Dialkoxides as Potential Catalysts for the Ring-opening Polymerization of Cyclic Esters by : Adam Beckett
Download or read book The Synthesis and Characterization of Methylbismuth Dialkoxides as Potential Catalysts for the Ring-opening Polymerization of Cyclic Esters written by Adam Beckett and published by . This book was released on 2017 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Preparation and Characterization of Amine Bis(Phenolate) Supported Bismuth Complexes as Potential Catalysts for the Ring Opening Polymerization of Cyclic Ester by : Sarah Martell
Download or read book Preparation and Characterization of Amine Bis(Phenolate) Supported Bismuth Complexes as Potential Catalysts for the Ring Opening Polymerization of Cyclic Ester written by Sarah Martell and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Chiral Indium Catalysts for the Ring-opening Polymerization of Cyclic Esters by : Dinesh Chinthaka Aluthge
Download or read book Chiral Indium Catalysts for the Ring-opening Polymerization of Cyclic Esters written by Dinesh Chinthaka Aluthge and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Biometal Catalyzed Ring-opening Polymerization of Cyclic Esters by : Osit Karroonnirun
Download or read book Biometal Catalyzed Ring-opening Polymerization of Cyclic Esters written by Osit Karroonnirun and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Biodegradable polyesters represent a class of extremely useful polymeric materials for many applications. Among these polyesters, the biodegradable and biocompatible, polylactide is very promising for many applications in both medical and industrial areas. Other biodegradable polymers such as polytrimethylene carbonate, polybutyrolactone, polyvalerolactone, and polycaprolactone can be blended or copolymerized with polylactide to fine tune the properties to fit the needs for their applications. The properties of these polymers and copolymers depend upon the tacticity of the polymers which can be directly controlled by the catalysts used for polymer production. Therefore, it has been of great interest to develop new selective catalytic systems for the ring-opening polymerization of lactide and other cyclic monomers. This dissertation focuses on developing new zinc and aluminum complexes and studying their selectivity and reactivity of these complexes for the ring-opening polymerization of lactide and other cyclic monomers, i.e. trimethylene carbonate, beta-butyrolactone, delta-valerolactone, and epsilon-caprolactone. Herein, aspects of the ring-opening polymerization of lactide and other cyclic monomers utilizing novel zinc and aluminum complexes will be discussed in detail. In the process for the ring-opening polymerization of lactide, chiral zinc half-salen complexes derived from natural amino acids have shown to be very active catalysts for producing polymers with high molecular weight and narrow polydispersities at ambient temperature. The chiral zinc complexes were found to catalyze rac-lactide to heterotactic polylactides with Pr values ranging from 0.68-0.89, depending on the catalyst and reaction temperature employed during the polymerization process. The reactivities of the various catalysts were greatly affected by substituents on the Schiff base ligands, with sterically bulky substituents being rate-enhancing. Furthermore, a series of both chiral and achiral aluminium half-salen complexes have been synthesized and characterized. These aluminum complexes all showed moderate selectivity to the ring-opening polymerization of rac-lactide to produce isotactic polylactide with Pm value up to 0.82 in toluene at 70 degrees C. Moreover, some of the studied aluminum complexes displayed epimerization of rac-lactide to meso-lactide during the polymerization process. Kinetic studies for the ring-opening polymerization of lactide utilizing these zinc and aluminum complexes are included in this dissertation. Along with these studies, the copolymerization of lactide with epsilon-caprolactone and delta-valerolactone will also be presented.
Book Synopsis Synthesis, Characterization and Oxidation of New Divalent Lanthanide Bis(phenolate) Complexes and Their Applications in the Ring Opening Polymerization of Cyclic Esters by : Divine Timah Dugah
Download or read book Synthesis, Characterization and Oxidation of New Divalent Lanthanide Bis(phenolate) Complexes and Their Applications in the Ring Opening Polymerization of Cyclic Esters written by Divine Timah Dugah and published by . This book was released on 2009 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Indium Thiolate Catalysts for the Ring Opening Polymerization of Lactones by : Jessica Danielle Marks
Download or read book Indium Thiolate Catalysts for the Ring Opening Polymerization of Lactones written by Jessica Danielle Marks and published by . This book was released on 2012 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Polyimides and Other High Temperature Polymers: Synthesis, Characterization and Applications, Volume 5 by : Kash L. Mittal
Download or read book Polyimides and Other High Temperature Polymers: Synthesis, Characterization and Applications, Volume 5 written by Kash L. Mittal and published by CRC Press. This book was released on 2009-04-24 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume documents the proceedings of the "Second International Symposium on Polyimides and Other High Temperature Polymers: Synthesis, Characterization and Applications, held in Newark, New Jersey, December 3-6, 2001. Polyimides possess many desirable attributes, so this class of materials has found applications in many technologies ranging fro
Book Synopsis Metallic Catalysts for Ring Opening Polymerization of Cyclic Esters and Related Compounds by : Isha Jain
Download or read book Metallic Catalysts for Ring Opening Polymerization of Cyclic Esters and Related Compounds written by Isha Jain and published by Mohammed Abdul Sattar. This book was released on 2024-03-24 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymers are extremely useful materials that have become an irreplaceable component of modern life. Synthetic polymers exhibit a multitude of applications in medicine, agriculture, packaging, and textile industries. Synthetic polymers like poly(ethylene) (PE), poly(propylene) (PP) and poly(styrene) (PS), poly (vinyl chloride) (PVC), poly (ethylene terephthalate) (PET), poly (urethane) (PU), etc. are obtained from petroleum-based sources and cover 90% of total synthesized plastics. A recent report revealed that global plastic production has increased from 270 million metric tons in the year 2010 to 370 million metric tons in 2020. The annual production volumes are expected to increase further in the coming years, approximately 590 million metric tons by the year 2050. Due to the non-biodegradability of synthetic polymers, each year post-consumer plastics generate huge waste which is diverted to landfills or the natural environment. These are pervasive and persistent in the environment and cause ecological and health risks at a global scale. In the recent past, a lot of scientific research efforts are devoted to replace non- biodegradable petroleum-based resources with renewable biodegradable polymers, and the polymer industry has witnessed remarkable progress. The bioplastics are rapidly gaining commercial interest globally, which is indicated by the up-trend in the market size which rose up to USD 13.11 billion in 2022 and expected to hit USD 46.1 billion by 2030. Estimated annual growth rate (CAGR) is expected to retain a value of 17.02% from 2022 to 2030. Among the various classes of biodegradable polymers, aliphatic polyesters are of leading interest since hydrolytic or enzymatic cleavage yields hydroxy carboxylic acids which can be metabolized to produce water and carbon dioxide as degradation products without formation of any toxic side product. For example, PLA (polylactide) is an attractive renewable alternative to the petro-based polymers, it decomposes in biological environments or in the presence of microorganisms to H20, C02 and humus to soil.
Book Synopsis Synthesis and Characterization of Dithiolene Complexes of Indium as Green Redox Active Catalysts by : Rachel Vanderkloet
Download or read book Synthesis and Characterization of Dithiolene Complexes of Indium as Green Redox Active Catalysts written by Rachel Vanderkloet and published by . This book was released on 2019 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Titanium Complexes Based on Aminodiol Ligand for Ring Opening Polymerization of Cyclic Esters by : Dakshinamoorthy Deivasagayam
Download or read book Titanium Complexes Based on Aminodiol Ligand for Ring Opening Polymerization of Cyclic Esters written by Dakshinamoorthy Deivasagayam and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of titanium isopropoxides complexes coordinated by enantiopure, racemic, meso and diastereomeric aminodiol ligands have been prepared and characterized by spectroscopic techniques. The complexes were tested as initiators for the ring opening polymerization (ROP) of cyclic esters such as L/rac-lactide, caprolactone, butyrolactone and trimethylene carbonate via coordination-insertion mechanism. In lactide polymerizations, all complexes showed significant activity both in solution at 70°C and in bulk at 130°C with a good control. The complex derived from rac-aminodiol ligand gave partially heterotactic polylactide in ROP of rac-lactide, whereas all other complexes yielded atactic polylactides. For caprolactone polymerizations, all complexes were found to be effective initiators under both solution and bulk conditions (up to 60% monomer conversion was reached within 10 min in bulk condition at 70°C), again with good control. Kinetic studies of ROP of lactides and caprolactone in solution conditions have been investigated and showed a first kinetic order in monomer. Significant activities were also observed for (ROP) of butyrolactone and trimethylene carbonate. Block copolymers of caprolactone and lactides were successfully synthesized with these catalytic systems by sequential polymerization techniques. The complexes were also tested as initiators for the production of random copolymers containing caprolactone and lactides and a reverse order of reactivity was observed between lactide and caprolactone compared to homopolymerization.
Book Synopsis Cyanide and Dithiocarbamate Complexes as Potential Catalysts for Ring-opening Polymerisation of Epoxides by : Dina Solanki
Download or read book Cyanide and Dithiocarbamate Complexes as Potential Catalysts for Ring-opening Polymerisation of Epoxides written by Dina Solanki and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ring-opening Polymerization written by and published by . This book was released on 1985 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis, Characterization, and Ring Opening Metathesis Polymerization Activity of Pentamethylcyclopentadienyl Osmium Complexes by : Julia Lynn Brumaghim
Download or read book Synthesis, Characterization, and Ring Opening Metathesis Polymerization Activity of Pentamethylcyclopentadienyl Osmium Complexes written by Julia Lynn Brumaghim and published by . This book was released on 1999 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cyanide and Dithiocarbamate Complexes as Potential Catalysts for Ring-opening Polymerisation of Epoxides by :
Download or read book Cyanide and Dithiocarbamate Complexes as Potential Catalysts for Ring-opening Polymerisation of Epoxides written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ice Cubes written by and published by . This book was released on 1969 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis and Characterization of Dithiolene Complexes of Bismuth as Green Redox Active Catalysts by : Lauren Wentzell
Download or read book Synthesis and Characterization of Dithiolene Complexes of Bismuth as Green Redox Active Catalysts written by Lauren Wentzell and published by . This book was released on 2019 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
