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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"melt processability"”.
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Synthesis and characterization of linear and star-branched butadiene-isoprene block copolymers and their hydrogenated derivatives
… for processing. Above the endothermic melting temperature of the semicrystalline end. blocks, the now amorphous system can approach the melt behavior of a singlephase melt, that is, displaying negligible "physical" network structure in the melt. Overall, these systems display a valuable …
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Synthesis and Non-Covalent Interactions of Novel Phosphonium-Containing Polymers
… structure of ionic aggregates regulates polymer melt processability. This dissertation highlights phosphonium-based chemistry for the synthesis of novel step-growth ionomers and structure-property relationships in ionic polymers. The synthesis of phosphonium endcapping reagents for melt polyester …
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Synthesis and Applications of Cellulose Derivatives for Drug Delivery
… for specific drug formulations. The use of melt extrusion in processing some of these drug/polymer dispersions provides a means of highlighting the capability for the use of these cellulosics in melt extruded amorphous dispersions. This solvent free, high pressure method significantly …
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Void-Free Flame Retardant Phenolic Networks: Properties and Processability
… improvement when compared to epoxy composites. Melt processability of phenolic/epoxy composites has been achieved through the use of latent nucleophilic initiators. Kinetics of the phenolic/epoxy cure reactions with latent initiators demonstrated that monomeric phosphine initiators yielded …
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Crystallization, Morphology, Thermal Stability and Adhesive Properties of Novel High Performance Semicrystalline Polyimides
… material and ability to crystallize from the melt; (c) fast crystallization kinetics and (d) melt processability. This unique combination of properties is presently unavailable in any other polyimide. In this regard, the present work investigates the crystallization, morphology and thermal …
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Upcycling of Polyolefins Through Functionalization
… through several reprocessing cycles due to the melt processability enabled by the presence of a urethane exchange catalyst. On the second route, PP was oxidated in a melt extruder using several flow conditions, extrusion time and additives. Several functionalities were obtained with the tradeoff …
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Crystallization behavior and structure property behavior of selected thermoplastic polymers
… general morphological features, equilibrium melting point, and abso1ute crystalline percentage of linear and starbranched nylon-6 have been studied as a function of branch-point functionality and crystallization temperature. Overall bulk crystallization rates were described in terms of the …
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Structure-Process-Property Relationships of Cellulose Nanocrystal Thermoplastic Urethane Composites
… unique mechanical adaptive response. Next, the melt processability of the nanocomposite was characterized using material extrusion (MatEx) additive manufacturing (AM). Additionally, the diffusion behavior of water within the film, which controls the dynamic mechanical response, was probed to …
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Synthesis and Characterization of Solution and Melt Processible Poly(acrylonitrile-co-methylacrylate) statistical copolymers
… $8 to ~$3-5. In order to develop an alternative melt processing route several benign plasticizers have been investigated. A low temperature, persulfate-metabisulfite initiated emulsion copolymerization was developed to synthesize poly(acrylonitrile-co-methyl acrylate) copolymers with …