Transcription of Lecture: Microstructures in Polymers
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Textbook: Plastics: Materials and Processing (Third Edition), by A. Brent Young (Pearson, NJ, 2006).Structure and Properties of Engineering PolymersLecture: Microstructures in PolymersNikolai V. PriezjevMicrostructures in Polymers Gas, liquid, and solid phases , crystalline vs. amorphous structure, viscosity Thermal expansion and heat distortion temperature Glass transition temperature, melting temperature, crystallization polymer degradation, aging phenomena Molecular weight distribution, polydispersityindex, degree of polymerization Effects of molecular weight, dispersity, branching on mechanical properties Melt index, shape (steric) effectsReading: Chapter 3 of Plastics: Materials and Processingby A.
Block copolymer microstructures and the phase diagram for the polystyrene-polyisoprene diblock copolymer system. The metastable perforated lamellar microstructure is illustrated in the upper right corner of the phase diagram. x, the relative volume fractions of the dissimilar segments N, molecular weight
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