ADHESION MECHANISMS OF POLYURETHANES TO GLASS SURFACES .2. PHASE-SEPARATION IN POLYURETHANES AND ITS EFFECTS ON ADHESION TO GLASS

被引:20
作者
AGRAWAL, RK [1 ]
DRZAL, LT [1 ]
机构
[1] MICHIGAN STATE UNIV,DEPT CHEM ENGN,CTR COMPOSITE MAT & STRUCT,E LANSING,MI 48824
关键词
ADHESION; POLYURETHANE; GLASS; PHASE SEPARATION; X-RAY PHOTOELECTRON SPECTROSCOPY;
D O I
10.1163/156856195X00068
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Polyurethanes were prepared from different molecular weight polycaprolactone-based polyols with varying amounts of hard segment made with toluene diisocyanate and butanediol. A theoretical model based on hard and soft segment miscibility was used to predict phase separation in these polyurethanes. Wide-angle X-ray diffraction, near-infrared spectroscopy, and Fourier transform infrared spectroscopy were used to determine phase separation. Good agreement was found between the experimental results and the theoretical predictions. The glass surfaces of the previously tested glass/polyurethane adhesion samples were analyzed by angular dependent X-ray photoelectron spectroscopy (ADXPS). ADXPS data revealed an interphase region of approximately 2-10 nm in thickness present between the polyurethane matrix and the glass substrate in each sample. The data also showed that the composition of the interphase region was influenced not only by the matrix composition, but also by the phase separation. The curve-fitted C 1s spectra of the interphase region showed the presence of C-O type linkages that could be due to the presence of C-OH from the polyols and/or the butanediols, and C-O-Si type bonds. These observations were supported by the adhesion results of various polyurethanes to glass test coupons primed with a 2% solution of butanediol in acetone.
引用
收藏
页码:1381 / 1400
页数:20
相关论文
共 31 条
[1]  
AGRAWAL RK, IN PRESS J ADHESION
[2]  
AGRAWAL RK, 1991, SOC AUTOMOTIVE ENG I
[3]   SCATTERING-THEORY AND PROPERTIES OF BLOCK COPOLYMERS WITH VARIOUS ARCHITECTURES IN THE HOMOGENEOUS BULK STATE [J].
BENOIT, H ;
HADZIIOANNOU, G .
MACROMOLECULES, 1988, 21 (05) :1449-1464
[4]   STRUCTURE OF THE HARD SEGMENTS IN POLYURETHANE ELASTOMERS [J].
BLACKWELL, J ;
GARDNER, KH .
POLYMER, 1979, 20 (01) :13-17
[5]   X-RAY INVESTIGATIONS CONCERNING PHYSICAL STRUCTURE OF CROSSLINKING IN URETHANE ELASTOMERS .3. COMMON STRUCTURE PRINCIPLES FOR EXTENSIONS WITH ALIPHATIC DIAMINES AND DIOLS [J].
BONART, R ;
MORBITZE.L ;
MULLER, EH .
JOURNAL OF MACROMOLECULAR SCIENCE-PHYSICS, 1974, B 9 (03) :447-461
[6]  
BRANDRUP J, 1989, POLYM HDB
[7]  
BYRNE CA, 1992, ADV URETHANE SCI TEC, V11, P68
[8]   EXPERIMENTAL STUDIES OF PHASE-SEPARATION IN REACTION INJECTION-MOLDED (RIM) POLYURETHANES [J].
CAMARGO, RE ;
MACOSKO, CW ;
TIRRELL, MV ;
WELLINGHOFF, ST .
POLYMER ENGINEERING AND SCIENCE, 1982, 22 (11) :719-728
[9]   PHASE-SEPARATION STUDIES IN RIM POLYURETHANES CATALYST AND HARD SEGMENT CRYSTALLINITY EFFECTS [J].
CAMARGO, RE ;
MACOSKO, CW ;
TIRRELL, M ;
WELLINGHOFF, ST .
POLYMER, 1985, 26 (08) :1145-1154