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Vinyl chloride/bicyclo (2.2.1) hepta‐2,5‐diene copolymers: High softening, easily processed vinyl resins
Author(s) -
Zutty N. L.,
Whitworth C. J.
Publication year - 1964
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760040106
Subject(s) - comonomer , copolymer , vinyl chloride , materials science , softening , polymer chemistry , softening point , diene , crystallinity , melting point , vinyl polymer , cyclopentadiene , acetylene , polymer , composite material , organic chemistry , chemistry , catalysis , natural rubber
Bicyclo [2.2.1] hepta‐2,5‐diene, the reaction product of acetylene and cyclopentadiene, and vinyl chloride readily copolymerized by a novel mechanism, to form copolymers containing the nortricyclene group whose softening points rapidly increase with increasing nortricycl one concentration. For each weight per cent copolymerized bicycloheptadiene, the softening point of the vinyl resin is increased about 1°C, making it the most effective comonomer known for this purpose. At the same time increasing nortricyclene concentration disrupts polymer crystallinity, lowers the resin's melting point, and hence its processing temperature, by about 3°C for each weight per cent copolymerized.