Premium
The nature of poly (vinyl chloride) crystallinity—the microdomain structure
Author(s) -
Summers James W.
Publication year - 1981
Publication title -
journal of vinyl technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 0193-7197
DOI - 10.1002/vnl.730030204
Subject(s) - crystallinity , materials science , swelling , recrystallization (geology) , microstructure , plasticizer , melting point , polyvinyl chloride , lamellar structure , crystallite , diffraction , polymer chemistry , composite material , network structure , chemical engineering , optics , physics , paleontology , metallurgy , biology , engineering , machine learning , computer science
The microstructure of polyvinyl chloride (PVC) controls much of its processing and property behavior. A model put together from X‐ray diffraction and small‐angle scattering data, swelling data, and processing data shows that PVC crystallites, of a wide melting range and spaced at 0.01 micron, act as crosslinks in a three‐dimensional network. Tie molecules limit swelling by plasticizer. The network prevents strong primary particle interaction at low melt temperatures. At higher temperatures, partial melting and then recrystallization leads to strong ties between particles and a tough product.