Correlation between the fracture toughness and -crystal fraction in a -nucleated propylene-based propylene-ethylene random copolymer
文献类型：期刊论文
| 作者 | Zhang, Chunbo; Liu, Guoming; Jiang, Qianhong; Zhao, Ying; Wang, Dujin |
| 刊名 | JOURNAL OF APPLIED POLYMER SCIENCE
 |
| 出版日期 | 2016-02-05 |
| 卷号 | 133期号:5 |
| 关键词 | crystallization mechanical properties polyolefins properties and characterization |
| 英文摘要 | Propylene-based propylene-ethylene random copolymer (PPR) has been widely used in the production of hot-water pipes. To further improve its toughness and thermal resistance, -nucleating agents (-NAs) are frequently incorporated. In this study, PPR containing 5.6 mol % ethylene units was modified by two kinds of -NAs, that is, calcium pimelate and N,N-dicyclohexylterephthalamide. The notched Izod impact strength of PPR increased with the addition of the -NAs. Drastically different toughening effects were found between the two -NAs. The structure of PPR with and without a -NA was investigated by calorimetry, X-ray diffraction, and thermomechanical analysis. The results indicated that the relative fraction of crystals (k) in the injection-molded specimens was determined by the type and content of -NA. The relationship between k and the impact toughness was summarized. A critical value for k (0.68) was identified for the brittle-ductile transition of PPR. PPR with -NA having a k greater than 0.68 displayed a higher impact strength than the other mixtures. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 42930. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2015-12-22 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/29171]  |
| 专题 | 化学研究所_工程塑料实验室 |
| 作者单位 | Chinese Acad Sci, Inst Chem, Key Lab Engn Plast, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Chunbo,Liu, Guoming,Jiang, Qianhong,et al. Correlation between the fracture toughness and -crystal fraction in a -nucleated propylene-based propylene-ethylene random copolymer[J]. JOURNAL OF APPLIED POLYMER SCIENCE,2016,133(5). |
| APA | Zhang, Chunbo,Liu, Guoming,Jiang, Qianhong,Zhao, Ying,&Wang, Dujin.(2016).Correlation between the fracture toughness and -crystal fraction in a -nucleated propylene-based propylene-ethylene random copolymer.JOURNAL OF APPLIED POLYMER SCIENCE,133(5). |
| MLA | Zhang, Chunbo,et al."Correlation between the fracture toughness and -crystal fraction in a -nucleated propylene-based propylene-ethylene random copolymer".JOURNAL OF APPLIED POLYMER SCIENCE 133.5(2016). |
入库方式： OAI收割
来源：化学研究所
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