Abstract
Crystallization and melting behavior of propylene/1-pentene random copolymers were studied. WAXD and d.s.c. measurements of isothermal crystallized samples confirm that the copolymers contain the γcrystal form in large quantity. The content of γform increases with increasing pentene content and crystallization temperature. We found a limitation in the relative γcontent around 60–65%. The efficiency of pentene comonomer is much higher than of ethylene. The equilibrium melting point decreases with pentene content in a nonlinear fashion, and the values are much lower than the theoretical ones.
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