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SEGMENT DENSITY PROFILES OF COMPACT POLYMER CHAINS CONFINED BETWEEN TWO PARALLEL PLANE WALLS
作者姓名:Shi-ben  Li  Lin-xi  Zhangb
作者单位:Department of
基金项目:国家自然科学基金 , 教育部跨世纪优秀人才培养计划 , 浙江省自然科学基金 , 中国博士后科学基金
摘    要:We use the pruned-enriched Rosenbluth method to investigate systematically the segment density profiles of compact polymer chains confined between two parallel plane walls.The non-adsorption case of adsorption interaction energyε=0 and the weak adsorption case ofε=-1 are considered for the compact polymer chains with different chain lengths N and different separation distances between two walls D.Several special entropy effects on the confined compact polymer chains,such as a damped oscillation in the segment density profile for the large separation distance D,are observed and discussed for different separation distances D in the non-adsorption case.In the weak adsorption case,investigations on the segment density profiles indicate that the competition between the entropy and adsorption effects results in an obvious depletion layer.Moreover,the scaling laws of the damped oscillation period T_d and the depletion layer width L_d are obtained for the confined compact chains.Most of these results are obtained for the first time so far as we know,which are expected to understand the properties of the confined compact polymer chains more completely.

关 键 词:聚合物    吸附效应  密度
收稿时间:2006-09-15
修稿时间:2006-09-15

SEGMENT DENSITY PROFILES OF COMPACT POLYMER CHAINS CONFINED BETWEEN TWO PARALLEL PLANE WALLS
Shi-ben Li Lin-xi Zhangb.SEGMENT DENSITY PROFILES OF COMPACT POLYMER CHAINS CONFINED BETWEEN TWO PARALLEL PLANE WALLS[J].Chinese Journal of Polymer Science,2007,0(5):525-533.
Authors:Shi-ben Li  Lin-xi Zhang
Institution:Department of Physics, Zhejiang University, Hangzhou 310027, China Department of Physics, Wenzhou University, Wenzhou 325027, China
Abstract:We use the pruned-enriched Rosenbluth method to investigate systematically the segment density profiles of compact polymer chains confined between two parallel plane walls.The non-adsorption case of adsorption interaction energy ε=0 and the weak adsorption case of ε=-1 are considered for the compact polymer chains with different chain lengths N and different separation distances between two walls D.Several special entropy effects on the confined compact polymer chains.such as a damped oscillation in the segment density profile for the large separation distance D,are observed and discussed for different separation distances D in the non-adsorption case.In the weak adsorption case,investigations on the segment density profiles indicate that the competition between the entropy and adsorption effects results in an obvious depletion layer.Moreover,the scaling laws of the damped oscillation period Td and the depletion layer width Ld are obtained for the confined compact chains.Most of these results are obtained for the first time so far as we know,which are expected to understand the properties of the confined compact polymer chains more completely.
Keywords:Compact polymer chains  Entropy and adsorption effects  Segment density profiles  Two parallel plane walls  
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