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Guo L, Xu H, Wu N, Yuan S, Zhou L, Wang D, Wang L. Molecular dynamics simulation of the effect of the thermal and mechanical properties of addition liquid silicone rubber modified by carbon nanotubes with different radii. E-POLYMERS 2023. [DOI: 10.1515/epoly-2022-8105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Abstract
For microscopic analysis of the effect of doping with carbon nanotubes (CNTs) of different radii on the thermal and mechanical properties of addition liquid silicone rubber (ALSR) composites, models of pure silicone rubber and silicone rubber composites containing CNTs of different radii were constructed based on a molecular dynamics approach using vinyl-capped polydimethylsiloxane (VPDMS) as the base polymer and polyhydroxymethylsiloxane (PHMS) as the cross-linker. The thermal and mechanical properties and microstructures of the different models were analyzed and compared. It was found that the doping of CNTs could change the thermomechanical properties of the composites, and the doping of CNTs with small radius had a more positive effect on the material, the thermal conductivity, glass transition temperature, and mechanical properties of the composites are improved. Due to the doping of CNTs, the free volume percentage and the mean square displacement of the composites are reduced. It is noteworthy that during the modeling and optimization process, there are molecular chains that pass through the large radius CNTs, and the structural properties of the composite CNTs themselves play a more critical role in the enhancement effect of the thermodynamic properties of the composites compared to the binding energy and free volume.
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Affiliation(s)
- Lei Guo
- School of Electrical Engineering, Southwest Jiaotong University , Chengdu 611756 , China
| | - Haiyun Xu
- School of Electrical Engineering, Southwest Jiaotong University , Chengdu 611756 , China
| | - Nenghang Wu
- School of Electrical Engineering, Southwest Jiaotong University , Chengdu 611756 , China
| | - Shuai Yuan
- School of Electrical Engineering, Southwest Jiaotong University , Chengdu 611756 , China
| | - Lijun Zhou
- School of Electrical Engineering, Southwest Jiaotong University , Chengdu 611756 , China
| | - Dongyang Wang
- School of Electrical Engineering, Southwest Jiaotong University , Chengdu 611756 , China
| | - Lujia Wang
- School of Electrical and Power Engineering, China University of Mining and Technology , Xuzhou 221116 , China
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Arras MM, He B, Jandt KD. High molar mass amphiphilic block copolymer enables alignment and dispersion of unfunctionalized carbon nanotubes in melt-drawn thin-films. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.08.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Tran MP, Detrembleur C, Alexandre M, Jerome C, Thomassin JM. The influence of foam morphology of multi-walled carbon nanotubes/poly(methyl methacrylate) nanocomposites on electrical conductivity. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.03.053] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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O'Donnell JM. Reversible addition-fragmentation chain transfer polymerization in microemulsion. Chem Soc Rev 2012; 41:3061-76. [DOI: 10.1039/c2cs15275d] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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