Adhesion hysteresis studies of extracted poly(dimethylsiloxane) using contact mechanics

被引:45
作者
Choi, GY
Kim, SJ
Ulman, A
机构
[1] POLYTECH UNIV,DEPT CHEM ENGN CHEM & MAT SCI,BROOKLYN,NY 11201
[2] POLYTECH UNIV,NSF MRSEC CTR POLYMERS ENGINEERED INTERFACES,BROOKLYN,NY 11201
关键词
D O I
10.1021/la970525d
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
We present results of adhesion studies of poly(dimethylsiloxane) (PDMS) crosslinked hemispheres, before and after extraction, carried out using contact mechanics (the JKR apparatus.) Three types of PDMS networks were prepared with increasing crosslinker to-PDMS ratio (r = 1.7, 2.2, 2.7). Adhesion hysteresis was observed only after the PDMS hemispheres were extracted (toluene, Soxhlet, 20-24 h.) The size of hysteresis increased systematically with the decreasing ratio (increasing percentage of extracted weight.) Brief extraction yielded smaller hysteresis, which disappeared after 12 days. It is concluded that the entanglement of tethered chains and their interdigitation with cross-linked PDMS network at the interface may be the dominating mechanisms for the observed adhesion hysteresis.
引用
收藏
页码:6333 / 6338
页数:6
相关论文
共 22 条
[1]   JKR studies of acrylic elastomer adhesion to glassy polymer substrates [J].
Ahn, D ;
Shull, KR .
MACROMOLECULES, 1996, 29 (12) :4381-4390
[2]   THE ADHESION BETWEEN POLYMERS [J].
BROWN, HR .
ANNUAL REVIEW OF MATERIALS SCIENCE, 1991, 21 :463-489
[3]  
CHANDHURY MK, 1992, SCIENCE, V255, P1230
[4]  
CHANDHURY MK, 1996, J MAT SCI ENG, V16, P95
[5]   ADHESION HYSTERESIS AND FRICTION [J].
CHAUDHURY, MK ;
OWEN, MJ .
LANGMUIR, 1993, 9 (01) :29-31
[6]   DIRECT MEASUREMENT OF INTERFACIAL INTERACTIONS BETWEEN SEMISPHERICAL LENSES AND FLAT SHEETS OF POLY(DIMETHYLSILOXANE) AND THEIR CHEMICAL DERIVATIVES [J].
CHAUDHURY, MK ;
WHITESIDES, GM .
LANGMUIR, 1991, 7 (05) :1013-1025
[7]   CORRELATION BETWEEN ADHESION HYSTERESIS AND PHASE STATE OF MONOLAYER FILMS [J].
CHAUDHURY, MK ;
OWEN, MJ .
JOURNAL OF PHYSICAL CHEMISTRY, 1993, 97 (21) :5722-5726
[8]   MOLECULAR MECHANISMS ASSOCIATED WITH ADHESION AND CONTACT-ANGLE HYSTERESIS OF MONOLAYER SURFACES [J].
CHEN, YL ;
HELM, CA ;
ISRAELACHVILI, JN .
JOURNAL OF PHYSICAL CHEMISTRY, 1991, 95 (26) :10736-10747
[9]   MOLECULAR-WEIGHT EFFECTS IN CHAIN PULLOUT [J].
CRETON, C ;
BROWN, HR ;
SHULL, KR .
MACROMOLECULES, 1994, 27 (12) :3174-3183
[10]   ADHESION AT THE SOLID-ELASTOMER INTERFACE - INFLUENCE OF THE INTERFACIAL CHAINS [J].
DERUELLE, M ;
LEGER, L ;
TIRRELL, M .
MACROMOLECULES, 1995, 28 (22) :7419-7428