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题名: Rheological study on the cure kinetics of two-component addition cured silicone rubber
作者: Guan, Dong-bo1; Cai, Zhong-yi2; Liu, Xin-chun1, 3; Lou, Bo4; Dou, Yan-li1; Xu, Dong-hua3; Yao, Wei-guo1
关键词: Silicone Rubber ; Cure kinetics ; Rheology ; Gel point ; Reaction model
刊名: CHINESE JOURNAL OF POLYMER SCIENCE
发表日期: 2016-10-01
卷: 34, 期:10, 页:1290-1300
收录类别: SCI
英文摘要: The cure kinetics for two-component silicone rubber formed by addition reaction was studied by the rheological method. The influence of reaction temperature (T) on the cure kinetics was explored in detail. It was observed that the data of gel time (t (gel), i.e. the time when the reaction reaches the gel point) or a specific reaction time (t (nc)) (defined as the reaction time before which time the influence of confinement of network on the diffusion of reaction components can be neglected) versus T obey certain functional relationship, which was well explained by the cure kinetics model of thermoset network. The cure kinetics for the two-component silicone rubber can be well fitted by the Kamal-Sourour(autocatalyst) reaction model rather than Kissinger model. When the reaction time was before or equal to t (nc), the reaction order obtained by the Kamal-Sourour reaction model was 2, which was consistent with the reaction order inferred from the two components chemical reaction when the diffusion of reaction components was not influenced by the formed cross-linked polymer network. When the reaction time was larger than t (nc), such as to the end of reaction (t (e)), the influence of confinement of network on the diffusion of reaction components cannot be neglected, and the reaction order obtained by the Kamal-Sourour reaction model was larger than 2. It was concluded that the confinement effect of network had a greater influence on the cure kinetics of the silicone rubber. The reaction rate constants (k (r)) under different temperatures were also determined by Kamal-Sourour reaction model. The activation energy (E) for the two-component silicone rubber was also calculated from the results of lnt (gel), lnt (nc), and lnk (r) versus 1/T, respectively. The three values of E were close, which indicated that above analyses were self-consistent.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35269
Appears in Collections:高分子物理与化学实验室_期刊论文

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作者单位: 1.Jilin Univ, Coll Mat Sci & Engn, Key Lab Automobile Mat, Minist Educ, Changchun 130025, Peoples R China
2.Jilin Univ, Roll Forging Technol Res Inst, Changchun 130025, Peoples R China
3.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
4.Zhejiang Zhulishen Med Co LTD, Zhuji 311814, Peoples R China
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