Journal
EUROPEAN POLYMER JOURNAL
Volume 46, Issue 6, Pages 1345-1354Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2010.03.014
Keywords
Isotactic polypropylene; Propylene-alpha-olefin copolymers; Metallocene catalyst; Monoclinic crystallites; Mesomorphic phase
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Funding
- Ministerio de Educacion y Ciencia [MAT2007-65519-C02-01]
- CONICYT [FONDAP 11980002]
- MEC
- European Community [RII3-CT-2004-506008]
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Several isotactic propene-alpha-olefin copolymers using 1-octene, 1-dodecene and 1-tetradecene as comonomers (CiPO, CiPDD and CiPTD, respectively) have been synthesized and their structure and thermal/mechanical/viscoelastic properties have been evaluated. At intermediate comonomer molar content ranged from around 4 to 9, the mesomorphic phase is developed under rather mild quenching conditions and independently of length of the comonomer. Thermal and mechanical parameters diminish as a-olefin content increases and their dependence on composition changes as function of existence of three-dimensional monoclinic crystallites or less ordered entities. (C) 2010 Elsevier Ltd. All rights reserved.
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