Journal
POLYMER
Volume 54, Issue 18, Pages 4814-4819Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2013.07.020
Keywords
Coagent modified poly(propylene); Heterogeneous nucleation; Cross-linked nanoparticles
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Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Network for Innovative Plastic Materials and Manufacturing Processes (NIPMMP)
- AUTO21 Networks of Centres of Excellence
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The radical-mediated addition of trimethylolpropane trimethacrylate (TMPTMA) to linear, isotactic polypropylene (PP) yields graft-modified derivatives that contain coagent-rich, cross-linked particles with sub-micron dimensions. The presence of this dispersed phase in coagent-modified polypropylene (CM-PP) is shown to increase the crystallization temperature and crystallization rate, owing to an enhanced heterogeneous nucleation mechanism. Analogous enhancements in nucleation are also demonstrated for a batch foaming process, wherein N-2 is used as a physical blowing agent. (C) 2013 Elsevier Ltd. All rights reserved.
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