ICCAS OpenIR
Effect of Copolymerization Time on the Microstructure and Properties of Polypropylene/Poly(ethylene-co-propylene) In-Reactor Alloys
Fan, Yandi1; Zhang, Chunyu2; Xue, Yanhu1; Nie, Wei1; Zhang, Xuequan2; Ji, Xiangling1; Bo, Shuqin1
2009
Source PublicationPOLYMER JOURNAL
ISSN0032-3896
Volume41Issue:12Pages:1098-1104
AbstractThree Polypropylene/Poly(ethylene-co-propylene) (PP/EPR) in-reactor alloys produced by a two-stage slurry/gas polymerization had different ethylene contents and mechanical properties, which were achieved by controlling the copolymerization time. The three alloys were fractionated into five fractions via temperature rising dissolution fractionation (TRDF), respectively. The chain structures of the whole samples and their fractions were analyzed using high-temperature gel permeation chromatography (GPC), Fourier transform infrared (FT-IR), (13)C nuclear magnetic resonance ((13)C NMR), and differential scanning calorimetry (DSC) techniques. These three in-reactor alloys mainly contained four portions: ethylenepropylene random copolymer (EPR), ethylene-propylene (EP) segmented and block copolymers, and propylene homopolymer. The increased copolymerization time caused the increased ethylene content of the sample. The weight percent of EPR, EP segmented and block copolymer also became higher. The more EPR content indeed improves the toughness of the alloy but lowers its stiffness. Increasing the ethylene content in the EPR fraction and EP segmented and block copolymer, as well as the suitable content of EPR, is believed to be the key factors resulting in the excellent toughness-stiffness balance of in-reactor alloys.
KeywordPp/epr In-reactor Alloy Fractionation Microstructure
DOI10.1295/polymj.PJ2009150
Indexed BySCI
Language英语
WOS IDWOS:000272990800013
PublisherSOC POLYMER SCIENCE JAPAN
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/66682
Collection中国科学院化学研究所
Corresponding AuthorJi, Xiangling
Affiliation1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
2.Chinese Acad Sci, Changchun Inst Appl Chem, Lab Polymer Engn, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Fan, Yandi,Zhang, Chunyu,Xue, Yanhu,et al. Effect of Copolymerization Time on the Microstructure and Properties of Polypropylene/Poly(ethylene-co-propylene) In-Reactor Alloys[J]. POLYMER JOURNAL,2009,41(12):1098-1104.
APA Fan, Yandi.,Zhang, Chunyu.,Xue, Yanhu.,Nie, Wei.,Zhang, Xuequan.,...&Bo, Shuqin.(2009).Effect of Copolymerization Time on the Microstructure and Properties of Polypropylene/Poly(ethylene-co-propylene) In-Reactor Alloys.POLYMER JOURNAL,41(12),1098-1104.
MLA Fan, Yandi,et al."Effect of Copolymerization Time on the Microstructure and Properties of Polypropylene/Poly(ethylene-co-propylene) In-Reactor Alloys".POLYMER JOURNAL 41.12(2009):1098-1104.
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