Journal
POLYMER JOURNAL
Volume 40, Issue 5, Pages 450-454Publisher
NATURE PUBLISHING GROUP
DOI: 10.1295/polymj.PJ2007195
Keywords
long chain branching polypropylene; linear polypropylene; crystallization behavior; crystal morphology
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Strain hardening and crystallization behaviors, crystal structure and morphology of linear/long-chain-branching polypropylene blends (LPP/LCBPP) was studied by means of Rheotens, DSC, XRD, and POM. Upon incorporation of LCBPP into LPP, the melt strength and the strain rate durability of the latter were obviously enhanced, the nucleation and overall crystallization rates were increased and crystallization temperature elevated. At some middle fraction of LCBPP, the most remarkably effects were observed. The content of the branched architecture and the entanglement density were considered responsible for these influences.
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