ENERGY-TRANSFER STUDY OF POLYMER DIFFUSION IN MELT-PRESSED FILMS OF POLY(METHYL METHACRYLATE)

被引：87

作者：

WANG, YC

WINNIK, MA

机构：

[1] UNIV TORONTO,DEPT CHEM,80 ST GEORGE ST,TORONTO M5S 1A1,ONTARIO,CANADA

[2] UNIV TORONTO,ERINDALE COLL,MISSISSAUGA L5L 1C6,ONTARIO,CANADA

来源：

MACROMOLECULES | 1993年 / 26卷 / 12期

关键词：

D O I：

10.1021/ma00064a025

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Films were prepared by melt-pressing poly(methyl methacrylate) (PMMA) powder into films at 115-degrees-C. The PMMA was in the form of monodisperse microspheres, ca. 100 nm in diameter, labeled with either phenanthrene or anthracene (1 mol %). Energy-transfer measurements were carried out on films composed of a 1:1 mixture of these particles, as a function of annealing time and oven temperature. From fluorescence decay profiles, the extent of polymer interdiffusion was determined. Diffusion coefficients were calculated. These range from 10(-15) cm2 s-1 at 149-degrees-C to 10(-18) cm2 s-1 at 120-degrees-C, corresponding to an activation energy of 100 kcal/mol.

引用

页码：3147 / 3150

页数：4

共 30 条

[1]

Child W. C., 1957, J COLLOID SCI, V12, P327

[2]

DEGENNES PG, 1980, CR ACAD SCI B PHYS, V291, P219

[3] SOME PHENOMENOLOGICAL CONSEQUENCES OF THE DOI-EDWARDS THEORY OF VISCOELASTICITY [J].