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Elastic behavior of bimodal poly(dimethylsiloxane) networks
Zhang, LX; Jiang, ZT; Zha, DL
2002
Source PublicationJOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
ISSN0887-6266
Volume40Issue:1Pages:105-114
AbstractThe rubberlike elastic behavior of bimodal poly(dimethylsiloxane) (PDMS) networks was investigated by the Monte Carlo simulation method and enumeration calculation method on the basis of the rotational-isomeric-state (RIS) model. These bimodal PDMS networks consist of short chains (chain length from 10 to 20) as well as long chains (chain length equal to 150), For long PDMS chains, through generating many PDMS conformations in the equilibrium state using the Monte Carlo simulation method we can obtain the average Helmholtz free energy and the average energy. For short PDMS chains with chain lengths from 10 to 20, as the total number of conformations is only from 6.56 X 10(3) to 3.87 X 10(8), we adopt the enumeration calculation method. The deformation is partitioned nonaffinely between the long and short chains, and this partitioning can be determined by requiring the free energy of the deformed network to be minimized. Chain dimensions and thermodynamic statistical properties of bimodal PDMS networks at various elongation ratios are discussed. We find that elastic force f increases with elongation ratio lambda; the energy contribution f(u) to elastic force is significant, and the ratio of ranges from 0.15 to 0.36 at T = 343 K. In the meantime, elastic force f increases with the average energy (U). The energy change in the process of tensile elongation is taken over, which has been ignored in previous theories. Our calculations may provide some insights into the phenomena of rubberlike elasticity of bimodal networks. (C) 2001 John Wiley & Sons, Inc.
KeywordElastic Behavior Rotational-isomeric-state (Ris) Model Monte Carlo Simulation Enumeration Calculation Method Bimodal Poly(Dimethylsiloxane) (Pdms) Networks Strain Conformational Analysis
Indexed BySCI
Language英语
WOS IDWOS:000172727700010
PublisherJOHN WILEY & SONS INC
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Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/78960
Collection中国科学院化学研究所
Corresponding AuthorZhang, LX
Affiliation1.Zhejiang Univ, Dept Phys, Hangzhou 310028, Peoples R China
2.Chinese Acad Sci, Inst Chem, Polymer Phys Lab, Ctr Mol Sci, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Zhang, LX,Jiang, ZT,Zha, DL. Elastic behavior of bimodal poly(dimethylsiloxane) networks[J]. JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS,2002,40(1):105-114.
APA Zhang, LX,Jiang, ZT,&Zha, DL.(2002).Elastic behavior of bimodal poly(dimethylsiloxane) networks.JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS,40(1),105-114.
MLA Zhang, LX,et al."Elastic behavior of bimodal poly(dimethylsiloxane) networks".JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS 40.1(2002):105-114.
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