Aging Effects on the Phase Composition and Chain Mobility of Isotactic Poly(propylene)

被引：43

作者：

Hedesiu, Cristian ^{[1
]}

Demco, Dan E. ^{[2
,3
]}

Kleppinger, Ralf ^{[4
]}

Poel, Geert Vanden ^{[4
]}

Remerie, Klaas ^{[1
]}

Litvinov, Victor M. ^{[4
]}

Bluemich, Bernhard ^{[5
]}

Steenbakkers, Rieky ^{[1
]}

机构：

[1] SABIC Europe BV, NL-6160 AH Geleen, Netherlands

[2] RWTH Aachen eV, DWI, D-52056 Aachen, Germany

[3] Rhein Westfal TH Aachen, Inst Tech & Macromol Chem, D-52056 Aachen, Germany

[4] DSM Res & Patents, NL-6160 MID Geleen, Netherlands

[5] Rhein Westfal TH Aachen, Inst Tech & Makromol Chem, D-52056 Aachen, Germany

来源：

MACROMOLECULAR MATERIALS AND ENGINEERING | 2008年 / 293卷 / 10期

关键词：

aging; isotactic poly(propylene) (PP); proton NMR transverse relaxation; SAXS;

D O I：

10.1002/mame.200800140

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Changes in phase composition and chain mobility in injection-molded isotactic poly(propylene), crystallized from the melt with slow cooling rate and subsequently quenched, associated with aging at temperature well above T-g for 150 and 1000 h, are studied using time-domain H-1 solid-state NMR and XRD. All sample exhibit physical aging when exposed to elevated temperatures, and the physical aging kinetics was observed to depend on the morphology of the homopolymer iPP and aging temperatures. The significant increase in the tensile modulus in time was observed for injection-molded iPP. The observed property changes induced by aging are attributed to microstructural changes within the semi-rigid and amorphous fractions.

引用

页码：847 / 857

页数：11

共 41 条

[1] THE PHYSICAL AGING OF ISOTACTIC POLYPROPYLENE [J].