中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Evolution of the interfacial tension between polydisperse "immiscible" polymers in the absence and in the presence of a compatibilizer

文献类型:期刊论文

作者Shi, TF; Ziegler, VE; Welge, IC; An, LJ; Wolf, BA
刊名MACROMOLECULES
出版日期2004-02-24
卷号37期号:4页码:1591-1599
ISSN号0024-9297
DOI10.1021/ma035616y
英文摘要The interfacial tension sigma between two polyisobutylenes (PIB) of dissimilar polydispersity and two polydisperse samples of poly(dimethylsiloxane) (PDMS) was measured as a function of time by means of a pendent drop apparatus at different temperatures ranging from 30 to 110 degreesC. In addition to three of the four possible binary blends, the time evolution of sigma was also determined for one ternary system, where the PIB phase contained 0.03 wt % of a diblock copolymer poly(isobutylene-b-dimethylsiloxane). The pronounced decrease of sigma with advancing time, observed in all cases, is attributed to the migration of the interfacially active lower molecular weight components of the homopolymers and of the compatibilizer into the interphase. Several days are normally required until a becomes constant. These time independent values are not considered as equilibrium data, but accredited to stationary states. A kinetic model is established for sigma(t), which enables a detailed investigation of the rates of transport of the different migrating species of average molar mass of M. Its application to the present data discloses that the characteristic times tau of their diffusion depend on M-d, where the estimated d values vary between 2.9 and 5.1. The modeled dependence of tau on the viscosities of the coexisting phases suggests that the activation energies for tau should be found somewhere between the activation energies for the viscous flow of these bulk phases. The experimental observations corroborate this postulate.
语种英语
WOS记录号WOS:000189091800054
出版者AMER CHEMICAL SOC
源URL[http://ir.iccas.ac.cn/handle/121111/55467]  
专题中国科学院化学研究所
通讯作者Wolf, BA
作者单位1.Univ Mainz, Inst Phys Chem, D-55099 Mainz, Germany
2.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
推荐引用方式
GB/T 7714
Shi, TF,Ziegler, VE,Welge, IC,et al. Evolution of the interfacial tension between polydisperse "immiscible" polymers in the absence and in the presence of a compatibilizer[J]. MACROMOLECULES,2004,37(4):1591-1599.
APA Shi, TF,Ziegler, VE,Welge, IC,An, LJ,&Wolf, BA.(2004).Evolution of the interfacial tension between polydisperse "immiscible" polymers in the absence and in the presence of a compatibilizer.MACROMOLECULES,37(4),1591-1599.
MLA Shi, TF,et al."Evolution of the interfacial tension between polydisperse "immiscible" polymers in the absence and in the presence of a compatibilizer".MACROMOLECULES 37.4(2004):1591-1599.

入库方式: OAI收割

来源:化学研究所

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