Bulletin of the American Physical Society
2008 APS March Meeting
Volume 53, Number 2
Monday–Friday, March 10–14, 2008; New Orleans, Louisiana
Session B25: Polymer Blends
11:15 AM–2:03 PM,
Monday, March 10, 2008
Morial Convention Center Room: 217
Sponsoring Unit: DPOLY
Chair: Rick Register, Princeton University
Abstract ID: BAPS.2008.MAR.B25.12
Abstract: B25.00012 : Effect of compositional heterogeneity on the phase structure and crystallization behavior of polypropylene in-reactor alloys.*
1:27 PM–1:39 PM
Preview Abstract Abstract
Charles C. Han
Although the compositional heterogeneity and chain structure of PP/EPR in-situ blends have been extensively investigated, little is known about the conclusive relationship among the molecular/phase structure and the ultimate mechanical properties due to its complex compositions in such system. A systematic study was conducted on the compositional heterogeneity, phase structure, the crystallization and subsequent melting behavior of two in-reactor alloys EB-P and EP-P. The composition of the alloys and the chain structure of each component were characterized by preparative TREF and 13C-NMR technique. The results showed that the excellent balance between toughness and rigidity of EB-P primarily benefits from the polyethylene homopolymer (HPE) phase and the ethylene-$\alpha $-olefin copolymer (EC) component, which is enriched at the interface between the dispersed phase (HPP) and the matrix (HPE). As for EP-P, the amorphous EC and the interpenetrating phase are mainly responsible for the outstanding low temperature impact toughness.
*Financial support from Ministry of Science and Technology is greatly acknowledged.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2008.MAR.B25.12
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