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Synthesis of Long‐Chain Branched Propylene Polymers via Macromonomer Incorporation
Author(s) -
Weng Weiqing,
Markel Eric J.,
Dekmezian Armenag H.
Publication year - 2001
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/1521-3927(20011201)22:18<1488::aid-marc1488>3.0.co;2-i
Subject(s) - macromonomer , materials science , tacticity , polymer , polymer chemistry , polymer science , composite material , polymerization
Abstract Long‐chain branched (LCB) poly(propylene)s (PP) are synthesized by the incorporation of pre‐formed, vinyl‐terminated macromonomers using metallocene catalysts. LCB‐PP polymers made with isotactic PP macromonomers are characterized by means of multi‐angle laser light scattering and extensional viscosimetry. The LCB polymers exhibit enhanced melt properties, such as strain hardening and shear thinning. These properties are critical in many polymer fabrication processes, such as thermoforming, blow molding and foaming.