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Investigation of the Melting and Crystallization Behavior of Random Propene/α‐Olefin Copolymers by DSC and CRYSTAF
Author(s) -
Brüll Robert,
Pasch Harald,
Raubenheimer Helgard G.,
Sanderson Ron,
van Reenen Albert J.,
Wahner Udo M.
Publication year - 2001
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 - 10.1002/1521-3935(20010501)202:8<1281::aid-macp1281>3.0.co;2-p
Subject(s) - comonomer , propene , crystallization , copolymer , melting point depression , melting point , materials science , polymer chemistry , olefin fiber , thermodynamics , catalysis , chemistry , organic chemistry , physics , composite material , polymer
The melting and crystallization behavior of random propene/higher linear α‐olefin copolymers synthesized with the catalyst system (CH 3 ) 2 Si(2‐methylbenz‐[e]indenyl) 2 ZrCl 2 /MAO were investigated. According to Flory's theory, the melting point depression is linearly related to the amount of comonomer incorporated irrespective of the nature thereof. The crystallization temperature decreased as well linearly with increasing comonomer content, but was independent of the comonomer type. The comonomer amount had an equally depressant effect on the melting temperature and on the crystallization temperature regardless of whether the crystallization occurred from melt or from dilute solution.