Effect of annealing temperature on low-temperature toughness of β-nucleated polypropylene random copolymer/ethylene-propylene-diene terpolymer blends

被引：13

作者：

Ding, Hui-Li ^{[1
]}

Guo, Li-yuan ^{[1
]}

Li, Dong-jing ^{[1
]}

Zheng, De ^{[2
]}

Chen, Jun ^{[2
]}

Qian, Yu-ying ^{[2
]}

机构：

[1] Hebei Univ Technol, Inst Polymer Sci & Engn, Tianjin 300130, Peoples R China

[2] Guangdong Winner Funct Mat Co Ltd, Foshan 528521, Peoples R China

来源：

CHINESE JOURNAL OF POLYMER SCIENCE | 2015年 / 33卷 / 02期

关键词：

Polypropylene; EPDM; beta-Nucleating agent; Annealing; Toughening; ELASTOMER-MODIFIED POLYPROPYLENE; ISOTACTIC POLYPROPYLENE; MECHANICAL-PROPERTIES; THERMAL-BEHAVIOR; PHASE; MORPHOLOGY; IMPACT; MICROSTRUCTURE; POLYETHYLENE; RHEOLOGY;

D O I：

10.1007/s10118-015-1579-1

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

In this study, the effect of annealing temperature on the impact toughness of beta-nucleated polypropylene random copolymer (PPR) and ethylene-propylene-diene terpolymer (EPDM) blends was investigated by differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD), dynamic mechanical analysis (DMA) and scanning electron microscopy (SEM). Interestingly, the impact strength of beta-PPR/20EPDM blend annealed at 120 A degrees C is 1.8 times as high as that of unannealed samples. In addition, the crystalline structure, the relaxation of chain segments and fracture morphology of beta-PPR/EPDM blends were also investigated to explore the toughening mechanism related to annealing. The results show that annealing at moderate temperatures results in the improvement of integrity of the crystal structure and the relative content of beta-phase. The work provides a possible method to toughen the semicrystalline polymer at low temperatures by annealing.

引用

页码：256 / 264

页数：9

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