STUDY OF POLYMER DIFFUSION ACROSS THE INTERFACE IN LATEX FILMS THROUGH DIRECT ENERGY-TRANSFER EXPERIMENTS

被引:59
作者
LIU, YS [1 ]
FENG, JR [1 ]
WINNIK, MA [1 ]
机构
[1] UNIV TORONTO,ERINDALE COLL,TORONTO M5S 1A1,ON,CANADA
关键词
D O I
10.1063/1.468488
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Efforts have been made to improve the method of using direct nonradiative energy transfer to follow the interdiffusion of polymer molecules across an interface. Two data analysis techniques are developed. The first one presents the extent of interdiffusion in terms of an acceptor concentration distribution; the second one recovers the diffusion coefficient and the concentration profile based on a Fickian diffusion model. The first method is model independent while the second method can be readily extended for other diffusion models. Polydisperse systems are characterized by a distribution of molecular mobilities. The energy transfer experiment provides a mean diffusion coefficient averaged over the sample history. For such systems, the concept of "instantaneous" effective diffusion coefficient and a method to derive it are discussed. These techniques are examined using computer simulations and tested in the study of molecular diffusion process of a poly(butyl methacrylate) latex system. © 1994 American Institute of Physics.
引用
收藏
页码:9096 / 9103
页数:8
相关论文
共 34 条
[1]   MEASUREMENT OF SELF-DIFFUSION COEFFICIENT IN POLYMER MELTS BY A SMALL-ANGLE NEUTRON-SCATTERING METHOD [J].
BARTELS, CR ;
GRAESSLEY, WW ;
CRIST, B .
JOURNAL OF POLYMER SCIENCE PART C-POLYMER LETTERS, 1983, 21 (06) :495-499
[2]  
Bevington P., 1969, DATA REDUCTION ERROR
[3]   SURFACE ENRICHMENT IN POLYMER BLENDS - A NEUTRON REFLECTION TEST [J].
COMPOSTO, RJ ;
STEIN, RS ;
KRAMER, EJ ;
JONES, RAL ;
MANSOUR, A ;
KARIM, A ;
FELCHER, GP .
PHYSICA B, 1989, 156 :434-436
[4]  
Crank J., 1975, MATH DIFFUSION, P93
[5]  
Crank J., 1968, DIFFUSION POLYM
[6]  
de Gennes P.-G, 1979, SCALING CONCEPTS POL
[7]  
DEGENNES PG, 1971, J PHYS, V9, P457
[8]  
DOI M, 1978, J CHEM SOC FARAD T 2, V74, P1789, DOI 10.1039/f29787401789
[9]  
DOI M, 1978, J CHEM SOC FARAD T 2, V74, P1802, DOI 10.1039/f29787401802
[10]  
DOI M, 1978, J CHEM SOC FARAD T 2, V74, P1818, DOI 10.1039/f29787401818