ICCAS OpenIR
Studies on the nature of the macromolecular condensed state of "nascent" ultra high molar mass polyethylene
Fan, ZY; Lan, Q; Bu, HS; Wu, LH; Sun, L; Qian, RY; Chen, SX; Men, YF; Jiang, BZ
2001
Source PublicationCHINESE JOURNAL OF POLYMER SCIENCE
ISSN0256-7679
Volume19Issue:1Pages:25-31
AbstractUltra high molar mass polyethylene (UHPE) powder as polymerized in a slurry process has been studied, in its nascent state, after recrystallization on rapid cooling from the melt and after hot compression molding to a film, by DSC, effect of annealing the recrystallized specimen at 120 similar to 130 degreesC, morphology by polarizing optical microscopy and small angle X-ray scattering. Based on the experimental results obtained the macromolecular condensed state of the nascent UHPE powder is a rare case of a multi-chain condensed state of non-interpenetrating chains, involving interlaced extended chain crystalline layers and relaxed parallel chain amorphous layers. On melting, a nematic rubbery state of nanometer size domain resulted. The nematic-isotropic transition temperature was judged from literature data to be at least 220 degreesC, possibly higher than 300 degreesC, the exact temperature is however not sue because of chain degradation at such high temperatures. The recrystallization process from the melt is a crystallization from a nematic rubbery state. The drop of remelting peak temperature by 10 K of the specimen recrystallized from its melt as compared to the nascent state has its origin in the decrease both of the crystalline chain stem length and of the degree of crystallinity. The remelting peak temperature could be returned close to that of the nascent state by annealing at 120 similar to 130 degreesC.
KeywordUltra High Molar Mass Polyethylene Recrystallization Remelting Annealing Nematic State
Indexed BySCI
Language英语
WOS IDWOS:000166329700005
PublisherSPRINGER-VERLAG BERLIN
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/77322
Collection中国科学院化学研究所
Corresponding AuthorQian, RY
Affiliation1.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
2.Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China
3.China Text Acad, Beijing 100025, Peoples R China
4.Chinese Acad Sci, Changchun Inst Appl Chem, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Fan, ZY,Lan, Q,Bu, HS,et al. Studies on the nature of the macromolecular condensed state of "nascent" ultra high molar mass polyethylene[J]. CHINESE JOURNAL OF POLYMER SCIENCE,2001,19(1):25-31.
APA Fan, ZY.,Lan, Q.,Bu, HS.,Wu, LH.,Sun, L.,...&Jiang, BZ.(2001).Studies on the nature of the macromolecular condensed state of "nascent" ultra high molar mass polyethylene.CHINESE JOURNAL OF POLYMER SCIENCE,19(1),25-31.
MLA Fan, ZY,et al."Studies on the nature of the macromolecular condensed state of "nascent" ultra high molar mass polyethylene".CHINESE JOURNAL OF POLYMER SCIENCE 19.1(2001):25-31.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Fan, ZY]'s Articles
[Lan, Q]'s Articles
[Bu, HS]'s Articles
Baidu academic
Similar articles in Baidu academic
[Fan, ZY]'s Articles
[Lan, Q]'s Articles
[Bu, HS]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Fan, ZY]'s Articles
[Lan, Q]'s Articles
[Bu, HS]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.