Formation of Vinylidene in Polypropylene/Ethylene Vinyl Acetate (PP/EVA) Blends During Degradation

被引：5
作者：
Alothman, Othman [2 ]
Salahudeen, Shafaat [1 ]
Elleithy, Rabeh [3 ]
Al-Zahrani, S. M. [1 ,2 ]
机构：
[1] King Saud Univ, SABIC Polymer Res Ctr, Riyadh 11421, Saudi Arabia
[2] King Saud Univ, Dept Chem Engn, Riyadh 11421, Saudi Arabia
[3] Printpack Inc, Williamsburg, VA USA
来源：
POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING | 2012年 / 51卷 / 05期
关键词：
Artificial exposure; Cross-linking; Degradation; Natural exposure; Polypropylene/ethyl vinyl acetate blend; Vinylidene; ACETATE)/CARBON BLACK MIXTURE; AGING CHARACTERISTICS; EVA; RADIATION; COPOLYMERS; FILMS; PHOTODEGRADATION; COMPOSITES; STABILITY; BEHAVIOR;
D O I：
10.1080/03602559.2012.654578
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 effect of natural exposure and artificial weathering on selected properties of PP/EVA blends was investigated. The vinyl acetate concentration decreased with exposure time due to acetylation. The most pronounced effect of radiation is associated with oxidative degradation. The cross-linking of PP/EVA blends was attributed to the formation of vinylidene group. Weathering decreased the tensile strength, elongation at break, and Young's modulus of the naturally and artificially exposed blends. This reduction was the result of blends' molecular weight reduction due to the degradation induced by weathering.
引用
收藏
页码：540 / 547
页数：8
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