Natural photo-aging degradation of polypropylene nanocomposites

被引：58

作者：

Li, Jifang ^{[1
]}

Yang, Rui ^{[1
]}

Yu, Han ^{[1
]}

Liu, Ying ^{[1
]}

机构：

[1] Tsinghua Univ, Inst Polymer Sci & Engn, Beijing 100084, Peoples R China

来源：

POLYMER DEGRADATION AND STABILITY | 2008年 / 93卷 / 01期

基金：

中国国家自然科学基金;

关键词：

polypropylene; nanocomposites; photo-oxidation; chain scission; re-crystallization;

D O I：

10.1016/j.polymdegradstab.2007.10.022

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The natural photo-aging degradation of polypropylene (PP), PP/CaCO3 and PP/SiO2 nanocomposites were studied outdoor for up to 88 days. The chemical structure characterized by Fourier transform infrared spectroscopy (FTIR) and pyrolysis gas chromatography-mass spectroscopy (PGC-MS) showed that PP nanocomposites are much more susceptible to photo-degradation than unfilled PP. And the oxidation rate is faster with more filler amount. There are lots of chain scissions happened in PP nanocomposites, accompanied with the formation of ketone, alcohol, ester and unsaturated double bond. This severe chain scission led to great decrease of M-n and M-w, and the consequent small fragments would re-crystallize and increase the crystallinity of the nanocomposites. However, these effects do not relate to the ultraviolet character of the two nano filters. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：84 / 89

页数：6

共 15 条

[1]

Castejón ML, 2001, POLYM DEGRAD STABIL, V71, P99

[2]

CASTEJON ML, 2000, POLYM DEGRADATION ST, V70, P347

[3] Crystallization and chemi-crystallization of recycled photo-degraded polypropylene [J].

Craig, IH ;

White, JR ;

Kin, PC .

POLYMER, 2005, 46 (02) :505-512

[4] Effect of stereoregularity on the photo-oxidative degradation and weathering of polypropylenes [J].

Kato, M ;

Tsuruta, A ;

Kuroda, S ;

Osawa, Z .

POLYMER DEGRADATION AND STABILITY, 2000, 67 (01) :1-5

[5] Characterization of talc/calcium carbonate filled polypropylene hybrid composites weathered in a natural environment [J].

Leong, YW ;

Abu Bakar, MB ;

Ishak, ZAM ;

Ariffin, A .

POLYMER DEGRADATION AND STABILITY, 2004, 83 (03) :411-422

[6] Photodegradation of polypropylene nanocomposites [J].

Mailhot, B ;

Morlat, S ;

Gardette, JL ;

Boucard, S ;

Duchet, J ;

Gérard, JF .

POLYMER DEGRADATION AND STABILITY, 2003, 82 (02) :163-167

[7]

Okada A, 1988, U.S. Patent, Patent No. [4739007A, 4739007]

[8] An overview on the degradability of polymer nanocomposites [J].

Pandey, JK ;

Reddy, KR ;

Kumar, AP ;

Singh, RP .

POLYMER DEGRADATION AND STABILITY, 2005, 88 (02) :234-250

[9] Photo-oxidative degradation of polypropylene/montmorillonite nanocomposites [J].

Qin, HL ;

Zhang, SM ;

Liu, HJ ;

Xie, SB ;

Yang, MS ;

Shen, DY .

POLYMER, 2005, 46 (09) :3149-3156

[10] Photo-oxidative degradation of polyethylene/montmorillonite nanocomposite [J].

Qin, HL ;

Zhao, CG ;

Zhang, SM ;

Chen, GM ;

Yang, MS .

POLYMER DEGRADATION AND STABILITY, 2003, 81 (03) :497-500

← 1 2 →