ICCAS OpenIR
Microstructure of two polypropylene homopolymers with improved impact properties
Fan, Yandi; Zhang, Chunyu; Xue, Yanhu; Zhang, Xuequan; Ji, Xiangling; Bo, Shuqin
2011-01-21
Source PublicationPOLYMER
ISSN0032-3861
Volume52Issue:2Pages:557-563
AbstractTwo polypropylene homopolymers, samples A and B. synthesized with heterogeneous Ziegler-Natta catalysts, are studied in this work. Both samples show improved impact properties at low temperature than isotactic PP. Particularly, sample B exhibits better toughness, higher molecular weight and slight lower flexural properties than sample A. Then, these two samples were fractionated into six fractions via temperature rising dissolution fractionation, respectively. Both samples are mainly composed of fractions 4, 5 and 6, which were collected above 100 degrees C and have high isotacticity. On the one hand, the fractions of sample B have higher molecular weight than the corresponding fractions of sample A collected at the same temperatures. On the other hand, (13)C NMR and DSC analyses of the fractions indicate clearly that fractions of sample B have lower isotacticity and crystallinity than the corresponding fractions of sample A. The above difference in microstructure between samples A and B should be the key factors resulting in their difference in mechanical properties finally. Both polypropylene homopolymers possibly become new type of impact PP. (C) 2010 Elsevier Ltd. All rights reserved.
KeywordPolypropylene Fractionation Microstructure
DOI10.1016/j.polymer.2010.12.009
Indexed BySCI
Language英语
WOS IDWOS:000286480100041
PublisherELSEVIER SCI LTD
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Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/71446
Collection中国科学院化学研究所
Corresponding AuthorJi, Xiangling
AffiliationChinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Fan, Yandi,Zhang, Chunyu,Xue, Yanhu,et al. Microstructure of two polypropylene homopolymers with improved impact properties[J]. POLYMER,2011,52(2):557-563.
APA Fan, Yandi,Zhang, Chunyu,Xue, Yanhu,Zhang, Xuequan,Ji, Xiangling,&Bo, Shuqin.(2011).Microstructure of two polypropylene homopolymers with improved impact properties.POLYMER,52(2),557-563.
MLA Fan, Yandi,et al."Microstructure of two polypropylene homopolymers with improved impact properties".POLYMER 52.2(2011):557-563.
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