ICCAS OpenIR
Mass transfer resistance in the production of high impact polypropylene
Tong, Cuiyan1,2; Chen, Yong1; Chen, Ye1; Zhang, Xuequan1; Yang, Decai1; Zhang, Jingping2
2008-06-10
Source PublicationPOLYMER
ISSN0032-3861
Volume49Issue:12Pages:2974-2978
AbstractMass transfer resistance in the production of high impact polypropylene (hiPP) produced by a two-stage slurry/gas polymerization was investigated by field-emission scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques. It is found that the formation of ethylene-propylene copolymer (EPR) phases in polypropylene (iPP) particle produced in the first stage slurry polymerization exhibits a developing process from exterior to interior. During the early stage of ethylene-propylene copolymerization, with lower content of copolymerized ethylene (7.4 mol%), the EPR phases occur only in the external layer of the particle, while at the later stage of the copolymerization with higher content of copolymerized ethylene (26.7 mol%), the elastomer phases distribute uniformly in the whole particle. This phenomenon is due to an effect of mass transfer resistance. The origin of mass transfer resistance is loosely agglomerate inclusions of low tacticity polypropylene within the semi-filled micropores inside the iPP particle. It is the inclusions inside the micropores that resist the diffusion of ethylene/propylene comonomers into the particle. (C) 2008 Elsevier Ltd. All rights reserved.
KeywordHigh Impact Polypropylene Morphology Mass Transfer Resistance
DOI10.1016/j.polymer.2008.04.039
Indexed BySCI
Language英语
WOS IDWOS:000257042500025
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/65650
Collection中国科学院化学研究所
Corresponding AuthorYang, Decai
Affiliation1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
2.NE Normal Univ, Fac Chem, Changchun 130024, Peoples R China
Recommended Citation
GB/T 7714
Tong, Cuiyan,Chen, Yong,Chen, Ye,et al. Mass transfer resistance in the production of high impact polypropylene[J]. POLYMER,2008,49(12):2974-2978.
APA Tong, Cuiyan,Chen, Yong,Chen, Ye,Zhang, Xuequan,Yang, Decai,&Zhang, Jingping.(2008).Mass transfer resistance in the production of high impact polypropylene.POLYMER,49(12),2974-2978.
MLA Tong, Cuiyan,et al."Mass transfer resistance in the production of high impact polypropylene".POLYMER 49.12(2008):2974-2978.
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