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Citation: LI Qiang, HUANG Guang-Su, JIANG Lu-Xia. Effect of Crosslinking Density on Damping Behavior of PMPS/PEMA SIN[J]. Chinese Journal of Applied Chemistry, ;2003, 20(6): 566-569. shu

Effect of Crosslinking Density on Damping Behavior of PMPS/PEMA SIN

1.
College of Polymer Science and Engineering, Sichuan University, Chengdu 610065

Corresponding author: HUANG Guang-Su,
Received Date: 6 September 2002
Available Online: 20 January 2003
Fund Project: 国家自然科学基金资助项目(59873014) (59873014)

A novel simultaneous interpenetrating polymer networks (SIN) damping material has been synthesized based on polyphenylsiloxane (PMPS) and poly (ethyl methacrylate)(PEMA).The average molecular weight between crosslinking point in SIN was found decreased with increase of the crosslinking agent polypropylene glycol diacrylate (PPDA),content in PEMA when ω(PMPS):ω(PEMA) was 50:50.According to the DMA,DSC and AFM results,the loss peak profits,heights and the temperature regions of tan δ≥0.3 all depended on the crosslinking agent content in PEMA,and it was also true for both the area under the curves of linear loss modulus vs temperature (LA) and the area under the linear loss factor vs temperature (TA).With mass fraction of crosslinking agent being 5%,the maximum TA and LA values were obtained and a damping platform appeared and the temperture region for tan δ≥0.3 could reach 170℃.
- polysiloxane,
- polyacrylate,
- interpenetrating polymer networks,
- crosslinking density,
- damping property
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