ICCAS OpenIR
The effects of alkali dehydroabietate on the crystallization process of polypropylene
Zhu, G; Li, CC; Li, ZY
2001-05-01
Source PublicationEUROPEAN POLYMER JOURNAL
ISSN0014-3057
Volume37Issue:5Pages:1007-1013
AbstractThe crystallization process of polypropylene (PP) with addition of a new kind of nucleating agent, alkali dehydroabietate, was studied. Two nucleated PP samples, PP-Nu-K and PP-Nu-Na, were used as matrices to monitor kinetics of crystallization process from the melt by differential scanning calorimeter and scanning electron microscope. Alkali dehydroabietate shortens crystallization half time t(1/2), and at 129 degreesC, t(1/2) was 410, 174, and 29 s for pure PP, PP-Nu-K, and PP-Nu-Na, respectively. At the same time, the fold surface energy a, of the developing crystals, however, increased and sigma (c) was 0.172 J/m(2) for pure PP, 0.183 J/m(2) for PP-Nu-K, and 0.202 J/m(2) for PP-Nu-Na. The increase in a, suggests nucleated PP having a smaller rate of crystal growth. SEM photographs show a much larger number of crystallization nuclei in PP-Nu-Na than in pure PP. The average volume of spherulites in pure PP is far greater than that in PP-Nu-Na. This indicates that alkali dehydroabietate can greatly increase the rate of crystallization of nucleated PP. (C) 2001 Elsevier Science Ltd. All rights reserved.
KeywordPolypropylene Alkali Dehydroabietate Nucleating Agent Crystallization
Indexed BySCI
Language英语
WOS IDWOS:000167625400019
PublisherPERGAMON-ELSEVIER SCIENCE LTD
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Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/76606
Collection中国科学院化学研究所
Corresponding AuthorLi, ZY
AffiliationChinese Acad Sci, Inst Chem, Ctr Mol Sci, State Key Lab Engn Plast, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Zhu, G,Li, CC,Li, ZY. The effects of alkali dehydroabietate on the crystallization process of polypropylene[J]. EUROPEAN POLYMER JOURNAL,2001,37(5):1007-1013.
APA Zhu, G,Li, CC,&Li, ZY.(2001).The effects of alkali dehydroabietate on the crystallization process of polypropylene.EUROPEAN POLYMER JOURNAL,37(5),1007-1013.
MLA Zhu, G,et al."The effects of alkali dehydroabietate on the crystallization process of polypropylene".EUROPEAN POLYMER JOURNAL 37.5(2001):1007-1013.
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