A comparison study on the melt crystallization kinetics of long chain branched and linear isotactic polypropylenes
文献类型：期刊论文
| 作者 | Zeng, Wei1,2; Liu JiChun5; Zhou JunFeng3,4; Dong JinYong3,4; Yan ShouKe1,2 |
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 2008 |
| 卷号 | 53期号:2页码:188-197 |
| 关键词 | Long Chain Branched Polypropylene Linear Isotactic Polypropylene Crystallization Kinetics |
| ISSN号 | 1001-6538 |
| DOI | 10.1007/s11434-007-0491-7 |
| 英文摘要 | The isothermal and non-isothermal crystallization kinetics of LCBPP and linear-iPP was investigated by optical microscopy and differential scanning calorimetry (DSC). The optical microscopy results in the isothermal crystallization process show that the crystals of LCBPP grow slower than the crystals of the linear-iPP. This originates from the low chain mobility, or in other words, the lower chain diffusion rate of LCBPP due to the existence of long side chains. The DSC results in the isothermal crystallization process show that the LCBPP exhibits, however, a higher overall crystallization rate with respect to the linear-iPP. This is related to the higher nucleation ability of LCBPP since the isothermal crystallization process of both LCBPP and linear-iPP are nucleation-dominated. Avrami analysis indicates that the nucleation nature and crystal growth manner of LCBPP and linear-iPP are about the same. The analyses of the non-isothermal crystallization processes indicate an increment in crystallization rate with increasing cooling rate. But at any cooling rate, the linear-iPP crystallizes more quickly than the LCBPP. This implies that the non-isothermal crystallization processes of LCBPP and linear-iPP are diffusion-dominated, in which the lower chain diffusion rate of LCBPP results in the slower crystallization of it. |
| 语种 | 英语 |
| WOS记录号 | WOS:000252973900005 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/63213]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Yan ShouKe |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Inst Chem, Joint Lab Polymer Sci & Mat, Beijing 100080, Peoples R China 3.Chinese Acad Sci, State Key Lab Polymer Phys & Chem, Beijing 100080, Peoples R China 4.Chinese Acad Sci, Key Lab Engn Plast, Beijing 100080, Peoples R China 5.Henan Univ Sci & Technol, Coll Engn & Pharmaceut, Key Lab Polymer Sci & Nanotechnol, Luoyang 471003, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zeng, Wei,Liu JiChun,Zhou JunFeng,et al. A comparison study on the melt crystallization kinetics of long chain branched and linear isotactic polypropylenes[J]. CHINESE SCIENCE BULLETIN,2008,53(2):188-197. |
| APA | Zeng, Wei,Liu JiChun,Zhou JunFeng,Dong JinYong,&Yan ShouKe.(2008).A comparison study on the melt crystallization kinetics of long chain branched and linear isotactic polypropylenes.CHINESE SCIENCE BULLETIN,53(2),188-197. |
| MLA | Zeng, Wei,et al."A comparison study on the melt crystallization kinetics of long chain branched and linear isotactic polypropylenes".CHINESE SCIENCE BULLETIN 53.2(2008):188-197. |
入库方式： OAI收割
来源：化学研究所
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