Polymorphism of macromolecules like polypropylene show multiple crystal structures from monoclinic (alpha), trigonal (hexagonal) Beta, and Gamma or orthorhomic and metaphase states (smectic) and new is the Epsion State. Question: Can you name all commerical plastic types by generic name that show multiple polymorphic crystat states e.g. PP for polypropylene and Nylon for polyamide. What are the name of each stat
Polymorphism of macromolecules like polypropylene show multiple crystal structures from monoclinic (alpha), trigonal (hexagonal) Beta, and Gamma or orthorhomic and metaphase states (smectic) and new is the Epsion State. Question: Can you name all commerical plastic types by generic name that show multiple polymorphic crystat states e.g. PP for polypropylene and Nylon for polyamide. What are the name of each state.
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Excellent. Have additional questions based on this superb response. #1 What are the specific polymorphic states with HDPE ? Does this apply to LDPE, LLDPE and the lower densities below HDPE range?
Second question: What does the science say about the alpha (orthorhomic) and beta (monoclinic) forms of PET? What state is the PET when we have clarity in soda and water bottles. Is that state alpha or beta and what is the crystal structure for the opaque crystal state? Are there temperature and shear conditions that change the crystal state of PET?
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