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| A comparison study on the melt crystallization kinetics of long chain branched and linear isotactic polypropylenes | |
| Zeng, Wei1,2; Liu JiChun5; Zhou JunFeng3,4; Dong JinYong3,4; Yan ShouKe1,2 | |
| 2008 | |
| Source Publication | CHINESE SCIENCE BULLETIN
 |
| ISSN | 1001-6538 |
| Volume | 53Issue:2Pages:188-197 |
| Abstract | 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. |
| Keyword | Long Chain Branched Polypropylene Linear Isotactic Polypropylene Crystallization Kinetics |
| DOI | 10.1007/s11434-007-0491-7 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000252973900005 |
| Publisher | SCIENCE CHINA PRESS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.iccas.ac.cn/handle/121111/63214 |
| Collection | 中国科学院化学研究所 |
| Corresponding Author | Yan ShouKe |
| Affiliation | 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 |
| Recommended Citation 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. |
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