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Phenylethynyl-endcapped oligomides with low melt viscosities and high T(g)s: effects of the molecular weights
Su, Cao-ning; Ji, Mian; Fan, Lin; Yang, Shi-yong
2011-08-01
Source PublicationHIGH PERFORMANCE POLYMERS
ISSN0954-0083
Volume23Issue:5Pages:352-361
AbstractPhenylethynyl-endcapped imideoligomers (oligomides) with low melt viscosities and high glass transition temperatures (T-g) were prepared by the high temperature polycondensation of 2,3,30,4'-biphenyltetracarboxcylic anhydride (a-BPDA), 4,4'-methylenebis(2,6-dimethylaniline) (MBDA) and 4-phenylethynyl-phthalic anhydride (4-PEPA). Experimental results indicated that the oligomides were mixtures of biphenylethynyl-endcapped imide oligomers with different degrees of polymerization (DP = 0, 1, 2, 3, 4), corresponding to the molecular weights (M-n) of 737 to 2787 determined by MALDI-TOF. The melt viscosities of the oligomide were reduced by lowering the calculated molecular weight (Calc'd M-n). The thermally cured polyimide neat resins showed glass transition temperatures (T-g) of > 400 degrees C and 5% weight loss temperature (T-5) of > 499 degrees C. It was also found that the mechanical properties of the thermally cured polyimide neat resins were dependent on the Calc'd M-n values of the oligomide, and improved gradually with increasing Calc'd Mn.
KeywordOligomides Melt Viscosity Thermal Stability Mechanical Property
DOI10.1177/0954008311410997
Indexed BySCI
Language英语
WOS IDWOS:000295076100002
PublisherSAGE PUBLICATIONS LTD
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/72498
Collection中国科学院化学研究所
Corresponding AuthorYang, Shi-yong
AffiliationChinese Acad Sci, Lab Adv Polymer Mat, Inst Chem, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Su, Cao-ning,Ji, Mian,Fan, Lin,et al. Phenylethynyl-endcapped oligomides with low melt viscosities and high T(g)s: effects of the molecular weights[J]. HIGH PERFORMANCE POLYMERS,2011,23(5):352-361.
APA Su, Cao-ning,Ji, Mian,Fan, Lin,&Yang, Shi-yong.(2011).Phenylethynyl-endcapped oligomides with low melt viscosities and high T(g)s: effects of the molecular weights.HIGH PERFORMANCE POLYMERS,23(5),352-361.
MLA Su, Cao-ning,et al."Phenylethynyl-endcapped oligomides with low melt viscosities and high T(g)s: effects of the molecular weights".HIGH PERFORMANCE POLYMERS 23.5(2011):352-361.
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