|本期目录/Table of Contents|

[1]王 敏,文华银,罗世凯,等.超临界二氧化碳对硅橡胶硫化动力学的影响[J].合成橡胶工业,2022,5:393-399.
 WANG Min,WEN Hua-yin,LUO Shi-kai,et al.Effect of supercritical carbon dioxide on vulcanization kinetics of silicone rubber[J].China synthetic rubber industy,2022,5:393-399.
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超临界二氧化碳对硅橡胶硫化动力学的影响(PDF)

《合成橡胶工业》[ISSN:1000-1255/CN:62-1036/TQ]

期数:
2022年5期
页码:
393-399
栏目:
出版日期:
2022-09-15

文章信息/Info

Title:
Effect of supercritical carbon dioxide on vulcanization kinetics of silicone rubber
文章编号:
1000-1255(2022)05-0393-07
作者:
王 敏1文华银1罗世凯12周元林1刘 涛2
1. 西南科技大学 材料科学与工程学院, 四川 绵阳 621010; 2. 中国工程物理研究院 化工材料研究所, 四川 绵阳 621900
Author(s):
WANG Min1WEN Hua-yin1LUO Shi-kai 12ZHOU Yuan-lin1 LIU Tao2
1. School of Materials Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,China; 2. Institute of Chemical Materials,China Academy of Engineering Physics,Mianyang 621900,China
关键词:
甲基乙烯基硅橡胶差示扫描量热法超临界二氧化碳硫化动力学表观活化能
Keywords:
methyl vinyl silicone rubber diffe-rential scanning calorimetry supercritical carbon dioxide vulcanization kinetics apparent activation energy
分类号:
TQ 333.93
DOI:
DOI:10.19908/j.cnki.ISSN1000-1255.2022.05.0393
文献标识码:
B
摘要:
采用差示扫描量热法考察了超临界二氧化碳(scCO2)的饱和时间、饱和温度(Ts)、饱和压力(Ps)和过氧化二异丙苯(DCP)用量对甲基乙烯基硅橡胶(MVQ)非等温硫化动力学的影响,并根据Kissinger法计算得到MVQ的硫化表观活化能(Ea),通过Málek法和?eatak-Berggren自催化模型确定了可用于描述MVQ硫化动力学行为的参数。结果表明,随着DCP用量增加,Ea增大。MVQ在scCO2中饱和12 h后Ea减少至117.0 kJ/mol。当Ts为70 ℃,Ps为20 MPa时Ea分别降至110.6 kJ/mol和109.4 kJ/mol。scCO2饱和前后MVQ的硫化反应级数均约为1,硫化过程均表现出自催化反应的特征。
Abstract:
Differential scanning calorimetry (DSC) was used to investigate the effects of saturation time, saturation temperature (Ts) and saturation pressure (Ps) of supercritical carbon dioxide (scCO2) and the amount of diisopropylbenzene peroxide (DCP) on the non-isothermal curing kinetics of methyl vinyl silicone rubber (MVQ). The apparent activation energy (Ea) of MVQ vulcanization was calculated according to the Kissinger method, and the parameters that could be used to describe the kinetic behavior of MVQ vulcanization were determined by the Málek method and?eatak-BerggrenBerggren autocatalytic model. The results showed that the Ea increased with the increasing amount of DCP. But Ea decreased to 117.0 kJ/mol after the MVQ was saturated in scCO2 for 12 h. When Ts was 70 ℃, and Ps was 20 MPa, Ea decreased to 110.6 kJ/mol and 109.4 kJ/mol, respectively. The order of MVQ vulcanization reaction before and after scCO2 saturation was about 1, and the vulcanization process showed the characteristics of autocatalytic reaction.

参考文献/References

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备注/Memo

备注/Memo:
国家自然科学基金资助项目(51773186)。
更新日期/Last Update: 2022-09-15