Rheological Study on the Cure Kinetics of Two-component Addition Cured Silicone Rubber

Guan Dong-bo; Cai Zhong-yi; Liu Xin-chun; Lou Bo; Dou Yan-li; Xu Dong-hua; Yao Wei-guo

doi:10.1007/s10118-016-1847-8

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Rheological Study on the Cure Kinetics of Two-component Addition Cured Silicone Rubber

PAPERS | Updated：2021-05-12

- Rheological Study on the Cure Kinetics of Two-component Addition Cured Silicone Rubber
- Rheological Study on the Cure Kinetics of Two-component Addition Cured Silicone Rubber
- Chinese Journal of Polymer Science 2016年34卷第10期页码：1290-1300
- Affiliations：
  
  a. Key Laboratory of Automobile Materials, Ministry of Education, College of Materials Science and Engineering, Jilin University, Changchun 130025, China
  b. Jilin University Roll Forging Technology Research Institute, Changchun 130025, China
  c. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  d.Zhejiang Zhulishen Medical Co. LTD, Zhuji 311814, China
- Author bio：
  
  Dong-hua Xu (许东华), E-mail: dhxu@ciac.ac.cn
  Wei-guo Yao (姚卫国), E-mail: wgyao@jlu.edu.cn
- Funds：
  
  the National Natural Science Foundation of China(21274152);the Science and Technology Development Project of Jilin Province, China(20150301002GX)
- DOI：10.1007/s10118-016-1847-8
  中图分类号：
- 收稿：2016-04-07，
  
  修回：2016-4-27，
  
  录用：2016-5-8，
  
  纸质出版：2016-02-25
- Accepted：
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Guan Dong-bo, Cai Zhong-yi, Liu Xin-chun, 等. Rheological Study on the Cure Kinetics of Two-component Addition Cured Silicone Rubber[J]. Chinese Journal of Polymer Science, 2016,34(10):1290-1300.

Guan Dong-bo, Cai Zhong-yi, Liu Xin-chun, et al. Rheological Study on the Cure Kinetics of Two-component Addition Cured Silicone Rubber[J]. Chinese Journal of Polymer Science, 2016, 34(10): 1290-1300.
Guan Dong-bo, Cai Zhong-yi, Liu Xin-chun, 等. Rheological Study on the Cure Kinetics of Two-component Addition Cured Silicone Rubber[J]. Chinese Journal of Polymer Science, 2016,34(10):1290-1300. DOI： 10.1007/s10118-016-1847-8.

Guan Dong-bo, Cai Zhong-yi, Liu Xin-chun, et al. Rheological Study on the Cure Kinetics of Two-component Addition Cured Silicone Rubber[J]. Chinese Journal of Polymer Science, 2016, 34(10): 1290-1300. DOI： 10.1007/s10118-016-1847-8.

摘要

Abstract

The cure kinetics for two-component silicone rubber formed by addition reaction was studied by the rheological method. The influence of reaction temperature (

) on the cure kinetics was explored in detail. It was observed that the data of gel time (

gel

i.e.

the time when the reaction reaches the gel point) or

a specific reaction time (

) (defined as the reaction time before which time the influence of confinement of network on the diffusion of reaction components can be neglected) versus

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

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

such as to the end of reaction (

)

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 (

) under different temperatures were also determined by Kamal-Sourour reaction model. The activation energy (

) for the two-component silicone rubber was also calculated from the results of ln

gel

and ln

versus 1/

respectively. The three values of

were close

which indicated that above analyses were self-consistent.

关键词

Keywords

references

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