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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 PublicationCHINESE SCIENCE BULLETIN
ISSN1001-6538
Volume53Issue:2Pages:188-197
AbstractThe 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.
KeywordLong Chain Branched Polypropylene Linear Isotactic Polypropylene Crystallization Kinetics
DOI10.1007/s11434-007-0491-7
Indexed BySCI
Language英语
WOS IDWOS:000252973900005
PublisherSCIENCE CHINA PRESS
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/63214
Collection中国科学院化学研究所
Corresponding AuthorYan ShouKe
Affiliation1.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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