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Bulk crystallization of solution epoxidized trans‐1,4‐polyisoprene
Author(s) -
Vasanthan Nadarajah,
Corrigan Joseph P.,
Woodward Arthur E.
Publication year - 1994
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1994.021950712
Subject(s) - crystallinity , crystallization , fourier transform infrared spectroscopy , materials science , scanning electron microscope , morphology (biology) , epoxy , polymer chemistry , copolymer , analytical chemistry (journal) , chemical engineering , composite material , chemistry , polymer , organic chemistry , biology , engineering , genetics
Copolymers of trans‐1,4‐polyisoprene containing 2,2 mol‐%, 5,0 mol‐% and 9,8 mol‐% epoxidized units were crystallized from the melt at temperatures ( T c ) of 25 to 36°C. The progress of the crystallization was monitored, and final crystallinities at T c and after cooling to 25°C were measured using Fourier‐transform infrared spectroscopy. The morphology of samples, treated with OsO 4 at 25°C after crystallization was complete, was observed using scanning electron microscopy. The crystallinity decreases linearly with increasing epoxy content at T c = 25°C and 30°C and shows marked deviations from linearity at T c = 36°C. Differences in morphology with epoxy content and T c were observed. The differences in crystallinity between solution and melt crystallized samples are discussed.