The effect of structure evolution upon heat treatment on the beta-nucleating ability of calcium pimelate in isotactic polypropylene
文献类型：期刊论文
| 作者 | Yue, Y; Hu, DD; Zhang, QL; Lin, JY; Feng, JC |
| 刊名 | POLYMER
 |
| 出版日期 | 2018 |
| 卷号 | 149期号:-页码:55-64 |
| ISSN号 | 0032-3861 |
| 关键词 | EPITAXIAL CRYSTALLIZATION SUPERMOLECULAR STRUCTURE MECHANICAL-PROPERTIES VIBRATIONAL-SPECTRA AGENT CRYSTAL SHEAR DICARBOXYLATES MORPHOLOGY BEHAVIOR |
| DOI | 10.1016/j.polymer.2018.06.060 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Calcium pimelate (CaPim) is known as one of the most stable and effective,beta-nucleating agents for isotactic polypropylene (iPP). To establish the structure-properties relationships of CaPim, the structure and corresponding,beta-nucleating ability of as-synthesized CaPim and CaPim annealed at temperature (T-a) varying from 130 to 330 degrees C were investigated. Our results revealed that as-synthesized CaPim and CaPim annealed at a relatively lower Ta were crystalline hydrates. However, the highly ordered crystalline structure would irreversibly destroyed and transformed to a weakly ordered form when treated at about 180 degrees C, accompanied by the complete deprivation of crystal water. The weakly ordered CaPim still maintained relatively high ordered degree at Ta range of 180-290 degrees C, but a further increase of Ta leads to the conversion of CaPim to disordered amorphous form. The measurements of relative beta-form content (kg) of iPP samples containing 0.05 wt% of various annealed CaPim suggested that the,beta-nucleating selectivity was closely correlated to the ordered degree of CaPim. As expected, the crystalline CaPim could induce high kg values of 0.82-0.91. Interestingly, the weakly ordered CaPim with residual ordered structure still showed a rather high, beta-selectivity with kg values of 0.53-0.68, while the amorphous CaPim almost lost its, beta-nucleating ability. Combined with the epitaxial crystallization theory, a probable mechanism on the correlation between structure and, beta-nucleating selectivity of CaPim was proposed. (C) 2018 Elsevier Ltd. All rights reserved. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/31136]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Inst Appl Phys, 239 Zhangheng Rd, Shanghai 201204, Peoples R China 2.Fudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, 220 Handan Rd, Shanghai 200433, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yue, Y,Hu, DD,Zhang, QL,et al. The effect of structure evolution upon heat treatment on the beta-nucleating ability of calcium pimelate in isotactic polypropylene[J]. POLYMER,2018,149(-):55-64. |
| APA | Yue, Y,Hu, DD,Zhang, QL,Lin, JY,&Feng, JC.(2018).The effect of structure evolution upon heat treatment on the beta-nucleating ability of calcium pimelate in isotactic polypropylene.POLYMER,149(-),55-64. |
| MLA | Yue, Y,et al."The effect of structure evolution upon heat treatment on the beta-nucleating ability of calcium pimelate in isotactic polypropylene".POLYMER 149.-(2018):55-64. |
入库方式： OAI收割
来源：上海应用物理研究所
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