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 |
| DOI | 10.1021/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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