Solvent retention in solution-cast films of PMMA: study by dielectric spectroscopy

被引:36
作者
Bistac, S [1 ]
Schultz, J [1 ]
机构
[1] Inst Chim Surfaces & Interfaces, CNRS, F-68057 Mulhouse, France
关键词
dielectric spectroscopy; PMMA films; solution casting; solvent retention; acid-base interactions;
D O I
10.1016/S0300-9440(97)00093-3
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Conventional PMMA was dissolved in two different solvents (chloroform and toluene). Solid polymeric films were formed after casting of the solutions on a substrate (aluminium) and evaporation of the solvent at room temperature during several days. The dielectric properties of the solid films were studied by dielectric spectroscopy. The evolution of the loss tangent (tan delta) versus temperature was analysed. The results show that the tan delta peak, corresponding to the alpha-transition (glass transition), is shifted towards the lower temperatures, as compared with the bulk polymer obtained by heating press, without any solvent. The magnitude of the shift depends on the type of solvent. These results indicate that, in all cases, solvent molecules are retained and cannot be completely evaporated at room temperature, even after a long period. Solvent molecules are still trapped inside the PMMA films, but their effect on the polymer chains mobility differs in function of the nature of the solvent. Explanations based on acid-base interactions are proposed to try to understand this phenomenon. This work illustrates the interest of dielectric spectroscopy for studying in situ the properties of thin cast polymer films. (C) 1997 Elsevier Science S.A.
引用
收藏
页码:347 / 350
页数:4
相关论文
共 11 条
[1]  
BORCHARD W, 1973, ANGEW MAKROMOL CHEM, V29-3, P471
[2]   ASSOCIATION OF STEREOREGULAR POLY(METHYL METHACRYLATES) .6. DOUBLE-STRANDED HELICAL STRUCTURE OF THE STEREO-COMPLEX OF ISOTACTIC AND SYNDIOTACTIC POLY(METHYL METHACRYLATE) [J].
BOSSCHER, F ;
TENBRINKE, G ;
CHALLA, G .
MACROMOLECULES, 1982, 15 (05) :1442-1444
[3]  
Boyer R. F., 1963, Rubber Chem. Technol, V36, P1303, DOI [10.5254/1.3539649, DOI 10.5254/1.3539649]
[4]   ACID-BASE COMPLEXES OF POLYMERS [J].
FOWKES, FM ;
TISCHLER, DO ;
WOLFE, JA ;
LANNIGAN, LA ;
ADEMUJOHN, CM ;
HALLIWELL, MJ .
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 1984, 22 (03) :547-566
[5]  
FOWKES FM, 1987, J ADHES SCI TECHNOL, V1, P7, DOI [DOI 10.1163/156856187X00049, 10.1163/156856187X00049]
[6]  
McCrum N.G, 1991, ANELASTIC DIELECTRIC, VDover ed
[7]   EFFECT OF STEREOREGULARITY ON GLASS TEMPERATURES OF A SERIES OF POLYACRYLATES AND POLYMETHACRYLATES [J].
SHETTER, JA .
JOURNAL OF POLYMER SCIENCE PART B-POLYMER LETTERS, 1963, 1 (05) :209-&
[8]   AGGREGATION OF STEREOREGULAR POLY(METHYL METHACRYLATES) [J].
SPEVACEK, J ;
SCHNEIDER, B .
ADVANCES IN COLLOID AND INTERFACE SCIENCE, 1987, 27 (1-2) :81-150
[9]  
STANDISH JV, 1981, J COATING TECHNOL, V53, P53
[10]  
UTTE K, 1995, POLYMER, V36, P1415