Cracking formation on the surface of extruded photodegraded polypropylene plates

被引：30

作者：

Fechine, G. J. M. ^{[1
]}

Demarquette, N. R. ^{[1
]}

机构：

[1] Univ Sao Paulo, Dept Met & Mat Engn, Sao Paulo, Brazil

来源：

POLYMER ENGINEERING AND SCIENCE | 2008年 / 48卷 / 02期

关键词：

D O I：

10.1002/pen.20958

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The cracking formation during the photodegradation of polypropylene (PP) plates (1 mm thickness), with (PPOx) and without pro-oxidant [PP), has been investigated. The plates were produced by extrusion in an industrial production line and were exposed to ultraviolet radiation in the laboratory for periods of up to 480 hr. The samples were investigated by infrared spectroscopy- FTIR, optical light microscopy, differential scanning calorimetry (DSC) and X-ray diffraction (XRD). The results showed that the extension of photodegradation process is more intense for PPOx than for PP samples. For both samples, cracks were formed at the surface perpendicularly to the flow-lines. However the cracks frequency was different for both samples and sides of sample. The crack frequency was correlated with chain orientation, A(110); it was shown that lower degrees of orientation resulted in lower crack frequency. POLYM. ENG. SCI., 48:365-372, 2008. (c) 2007 Society of Plastics Engineers.

引用

页码：365 / 372

页数：8

共 23 条

[1] SUSCEPTIBILITY OF ENHANCED ENVIRONMENTALLY DEGRADABLE POLYETHYLENE TO THERMAL AND PHOTOOXIDATION [J].

ALBERTSSON, AC ;

BARENSTEDT, C ;

KARLSSON, S .

POLYMER DEGRADATION AND STABILITY, 1992, 37 (02) :163-171

[2] Thermal and photooxidation of polypropylene influence of long-term ambient oxidation: Spectroscopic, thermal and light scattering studies [J].

Allen, NS ;

Edge, M ;

Corrales, T ;

Shah, M ;

Holdsworth, D ;

Catalina, F ;

Peinado, C ;

Collar, EP .

POLYMER, 1996, 37 (12) :2323-2333

[3]

ALLEN NS, 1995, ENG PLAST, V8, P247

[4]

CARLSSON DJ, 1976, J MACROMOL SCI R M C, VC 14, P65

[5] Oxo-biodegradable carbon backbone polymers - Oxidative degradation of polyethylene under accelerated test conditions [J].

Chiellini, E. ;

Corti, A. ;

D'Antone, S. ;

Baciu, R. .

POLYMER DEGRADATION AND STABILITY, 2006, 91 (11) :2739-2747

[6] Biodegradation of thermally-oxidized, fragmented low-density polyethylenes [J].

Chiellini, E ;

Corti, A ;

Swift, G .

POLYMER DEGRADATION AND STABILITY, 2003, 81 (02) :341-351

[7] Induction time and later degradation of outdoor exposed polypropylene cast film studied by differential scanning calorimetry [J].

Gallo, R ;

Severini, F ;

Ipsale, S ;

DelFanti, N .

POLYMER DEGRADATION AND STABILITY, 1997, 55 (02) :199-207

[8] Oxidation thickness profiles during photooxidation of non-photostabilized polypropylene [J].

Girois, S ;

Delprat, P ;

Audouin, L ;

Verdu, J .

POLYMER DEGRADATION AND STABILITY, 1997, 56 (02) :169-177

[9] Molecular weight changes during the photooxidation of isotactic polypropylene [J].

Girois, S ;

Audouin, L ;

Verdu, J ;

Delprat, P ;

Marot, G .

POLYMER DEGRADATION AND STABILITY, 1996, 51 (02) :125-132

[10] Morphology and elasticity of oriented syndiotactic polypropylene from solvent cast films [J].

Guadagno, Liberata ;

Naddeo, Carlo ;

Raimondo, Marialuigia ;

Senatore, Angela ;

Vittoria, Vittoria .

CRYSTAL GROWTH & DESIGN, 2006, 6 (07) :1703-1710

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