ICCAS OpenIR
Effects of annealing above glass transition temperature T-g on the liquid-liquid transition of atactic polly(methyl methacrylate)
Gu, Q; Shen, DY
2001-03-01
Source PublicationCHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
ISSN0251-0790
Volume22Issue:3Pages:508-510
AbstractEffects of annealing temperature(T-a) and annealing time(t(a)) on the liquid-liquid transition and transition intensity of atactic poly(methyl methacrylate) were studied by means of differential scanning calorimetry. With the increase of T-a from 393 to 443 K, T-II shifted to higher temperature with the decrease in transition intensity, on the contrary, when T-a was over 443 K, T-II declined and transition intensity increased. When T-a kept constant with the increase of t(a), T-II and transition intensity varied as the results described above. Moreover, the variation extent of Tu and transition intensity increased with the increase of T-a, in other words, the time needed reaching the maximum extent of variation of the two parameters was decreased with the increase of T-a. The dependence of T-II and transition intensity on annealing conditions may be explained by the formation of local ordered structure, i.e, stereocomplex, during the annealing process by means of Van der Waals forces between isotacitic and syndiotactic segments of the same or different chains of atactic poly(methyl methacrylate).
KeywordLiquid-liquid Transition Atatic Poly(Methyl Methacrylate) Annealing
Indexed BySCI
Language英语
WOS IDWOS:000167641400037
PublisherHIGHER EDUCATION PRESS
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/77280
Collection中国科学院化学研究所
Corresponding AuthorGu, Q
AffiliationChinese Acad Sci, Inst Chem, Polymer Phys Lab, Ctr Mol Sci, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Gu, Q,Shen, DY. Effects of annealing above glass transition temperature T-g on the liquid-liquid transition of atactic polly(methyl methacrylate)[J]. CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,2001,22(3):508-510.
APA Gu, Q,&Shen, DY.(2001).Effects of annealing above glass transition temperature T-g on the liquid-liquid transition of atactic polly(methyl methacrylate).CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,22(3),508-510.
MLA Gu, Q,et al."Effects of annealing above glass transition temperature T-g on the liquid-liquid transition of atactic polly(methyl methacrylate)".CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE 22.3(2001):508-510.
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