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Learn about the molecular weight, degree of polymerization, crystallinity, and spherulite formation of polymers. Find out how these properties affect the transition temperature, viscosity, and mechanical properties of polymers.
Know the properties of polymers based on their molecular and intermolecular structures. Know the relationship between degree of crystallinity to physical properties of polymers.
Linear amorphous polymers are glasslike at low temperatures and become leathery at temperatures slightly higher than the glass transition temperature (T g). These leathery polymers become rubbery at slightly higher temperatures, and crystalline polymers melt at the melting point (T m).
4 kwi 2023 · Additionally, thermal properties are of paramount importance in the environmental aspects of the investigation, including the combustion and recycling of polymeric materials, the thermal use of polymer waste with energy recovery, photovoltaic and thermal insulation materials, and many other significant issues.
Extends coverage of critical topics such as electrical and magnetic properties, rheological properties of polymer melts, and environmental behavior and failure. Discusses liquid crystalline polymers across chapters 6, 15, and 16 for greater breadth and depth of coverage.
1 sty 2022 · The mechanical and thermal properties of polymers are significantly influenced by a variety of microstructural and molecular factors (e.g., molecular weight, crystallinity, crosslinking, branching, copolymerization, residual stress, and molecular orientation), as well as a series of environmental and external conditions (e.g., type of ...
By changing temperature, crystalline polymers experience the various phase transitions including the phenomena of melting, crystallization, thermal degradation, and so on. The experimental techniques how to measure the thermal behaviors of polymer materials are introduced in a concrete manner.
