Dynamic Heterogeneity and Phase Separation Kinetics in Miscible Poly(vinyl acetate)/Poly(ethylene oxide) Blends by Local Dielectric Spectroscopy

被引：11

作者：

Corrales, Tomas P. ^{[1
]}

Laroze, David ^{[1
,2
]}

Zardalidis, George ^{[3
]}

Floudas, George ^{[1
,3
]}

Butt, Hans-Juergen ^{[1
]}

Kappl, Michael ^{[1
]}

机构：

[1] Max Planck Inst Polymer Res, D-55128 Mainz, Germany

[2] Univ Tarapaca, Inst Alta Invest, Tarapaca, Chile

[3] Univ Ioannina, Dept Phys, GR-45110 Ioannina, Greece

来源：

MACROMOLECULES | 2013年 / 46卷 / 18期

关键词：

OXIDE)-POLY(VINYL ACETATE) BLENDS; ELECTROSTATIC FORCE MICROSCOPY; POLY(ETHYLENE OXIDE); POLYMER BLENDS; POLY(METHYL METHACRYLATE); SEGMENTAL DYNAMICS; GLASS-TRANSITION; ALPHA-RELAXATION; DIFFUSION; FILMS;

D O I：

10.1021/ma4007158

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Local dielectric spectroscopy (LDS) was employed to analyze the miscible blend composed of poly(vinyl acetate) (PVAc) and poly(ethylene oxide) (PEO). The two homopolymers have very different relaxation times and glass transition temperatures. The aim was to study the dynamic heterogeneity in films as a function of, the film thickness. Measurements of the local blend composition at the nanoscale have shown that LDS is sensitive to the dynamic heterogeneity. In thinner films, phase segregation occurs, and the kinetics of phase demixing was studied using as a probe the change in local composition. These results open new possibilities for studying interdiffusion and adhesion at polymer polymer interfaces as a function of annealing temperature with LDS.

引用

页码：7458 / 7464

页数：7

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