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Melting and crystallization behavior of an unusual compatible blend based on propylene copolymers
Author(s) -
Shih ChiKai
Publication year - 1987
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.760270611
Subject(s) - materials science , tacticity , copolymer , polymer , crystallization , melting point , glass transition , compatibility (geochemistry) , melting temperature , differential scanning calorimetry , polymer chemistry , olefin fiber , polymer blend , chemical engineering , composite material , polymerization , thermodynamics , physics , engineering
An unusual compatibility was observed with the melt blends of propylene/α‐olefin copolymer with isotactic homopolypropylene. The simple binary blend exhibits a single glass‐transition temperature, and, by differential scanning colorimetry, a single melting and crystallization temperature over the entire blending ratios examined. Depending on the compositions, the characteristic temperatures vary between those exhibited by the component polymers. Vigorous annealings failed to phase separate the components. The melting behavior of the annealed polymer sample suggests the crystalline components of the two polymers are cocrystallized in this unique compatible system.