EXCIMER FLUORESCENCE AS A MOLECULAR PROBE OF POLYMER BLEND MISCIBILITY .7. NONEQUILIBRIUM SOLVENT CASTING EFFECTS IN BLENDS OF POLY(2-VINYLNAPHTHALENE) WITH POLY(NORMAL-BUTYL METHACRYLATE) AND POLY(METHYL METHACRYLATE)

被引：13

作者：

GASHGARI, MA ^{[1
]}

FRANK, CW ^{[1
]}

机构：

[1] STANFORD UNIV,DEPT CHEM ENGN,STANFORD,CA 94305

来源：

MACROMOLECULES | 1988年 / 21卷 / 09期

关键词：

Heat Treatment--Annealing - Polymers--Blending - Probes;

D O I：

10.1021/ma00187a024

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Blends of poly(2-vinylnaphthalene) (P2VN) with poly(n-butyl methacrylate) (PnBMA) or poly(methyl methacrylate) (PMMA) are prepared by solvent casting from toluene at temperatures from 295 to 353 K for P2VN concentrations from 0.10 to 10.0 wt percent. Excimer fluorescence from P2VN is analyzed by a two-phase model for blend morphology. Deviations from thermodynamic equilibrium are interpreted in terms of kinetic restrictions arising during solvent evaporation from the ternary system. Annealing experiments in P2VN/ PMMA blends yield a rate constant for increase in local P2VN concentration that increases as the blend becomes closer to its equilibrium-phase morphology.

引用

页码：2782 / 2790

页数：9

共 21 条

[1] INTRA-MOLECULAR EXCIMER FORMATION IN POLYSTYRENE MODEL MOLECULES [J].