Orientation direction dependency of cavitation in pre-oriented isotactic polypropylene at large strains
文献类型：期刊论文
| 作者 | Lu, Ying1; Thompson, Glen2; Lyu, Dong1,3; Caton-Rose, Philip2; Coates, Phil2; Men, Yongfeng1,3 |
| 刊名 | SOFT MATTER
 |
| 出版日期 | 2018-06-14 |
| 卷号 | 14期号:22 |
| ISSN号 | 1744-683X |
| DOI | 10.1039/c7sm02446k |
| 英文摘要 | Orientation direction dependency of whitening activated at large strains was studied using four pre-oriented isotactic polypropylene (iPP) samples with different molecular weights stretched along different directions with respect to the pre-orientation (0 degrees, 45 degrees, and 90 degrees) by means of in situ wide-, small-, and ultra-small-angle X-ray scattering techniques. A macroscopic fracture of iPP materials was also observed following the stress whitening at large strains. These two associated processes in pre-oriented iPP samples at elevated temperatures were found to be governed by not only the molecular weight of iPP but also the pre-orientation direction. For a certain pre-orientation direction of iPP, both the critical stress of cavitation induced-whitening and failure stress increased with increasing molecular weight. For one given molecular weight, the pre-oriented iPP showed the smallest critical stress for whitening and failure stress along the pre-orientation direction (0 degrees) while the samples displayed larger values for the same behaviors when stretched at 45 degrees or 90 degrees with respect to the pre-orientation direction. Such behavior suggested that oriented amorphous networks, with different mechanical strengths, can be generated during the second deformation processes in these pre-oriented iPP samples. The evolution of inter-fibrillar tie chains in highly oriented amorphous networks was considered as the main factor controlling the response of the inner network to the external stress since the cavitation-induced whitening activated at large strains was caused by the failure of load bearing inter-fibrillar tie chains in the oriented amorphous network. |
| 语种 | 英语 |
| WOS记录号 | WOS:000434697000002 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/42783]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Coates, Phil; Men, Yongfeng |
| 作者单位 | 1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Renmin St 5625, Changchun 130022, Jilin, Peoples R China 2.Univ Bradford, Sch Engn Design & Technol, Bradford BD7 1DP, W Yorkshire, England 3.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lu, Ying,Thompson, Glen,Lyu, Dong,et al. Orientation direction dependency of cavitation in pre-oriented isotactic polypropylene at large strains[J]. SOFT MATTER,2018,14(22). |
| APA | Lu, Ying,Thompson, Glen,Lyu, Dong,Caton-Rose, Philip,Coates, Phil,&Men, Yongfeng.(2018).Orientation direction dependency of cavitation in pre-oriented isotactic polypropylene at large strains.SOFT MATTER,14(22). |
| MLA | Lu, Ying,et al."Orientation direction dependency of cavitation in pre-oriented isotactic polypropylene at large strains".SOFT MATTER 14.22(2018). |
入库方式： OAI收割
来源：化学研究所
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