Synthesis and characterization of polystyrene-g-polydimethylsiloxane copolymers

XU Yongshen; DAI Jianhua; ZHANG Minlian; YUAN Caideng

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Synthesis and characterization of polystyrene-g-polydimethylsiloxane copolymers

更新时间：2025-12-10

- Synthesis and characterization of polystyrene-g-polydimethylsiloxane copolymers
- CIESC Journal Issue 6, Pages: 1120-1123(2005)
- 作者机构：
  
  天津大学化工学院,天津,300072
- 作者简介：
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- Online First：25 June 2005，
  
  Published：25 June 2005
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XU Yongshen, DAI Jianhua, ZHANG Minlian, et al. Synthesis and characterization of polystyrene-g-polydimethylsiloxane copolymers[J]. CIESC Journal, 2005, (6): 1120-1123.
DOI：

XU Yongshen, DAI Jianhua, ZHANG Minlian, et al. Synthesis and characterization of polystyrene-g-polydimethylsiloxane copolymers[J]. CIESC Journal, 2005, (6): 1120-1123. DOI：

摘要

以甲基丙烯酰氧丙基聚硅氧烷大单体(PDMS-MA)与苯乙烯共聚合

制备了聚苯乙烯-聚硅氧烷梳状接枝共聚物（PSt-g-PDMS），采用傅里叶变换红外光谱（FTIR）表征了接枝共聚物的组成，研究了聚硅氧烷大单体的相对分子质量对共聚合活性的影响，并对接枝共聚物的热性能进行了表征.结果表明，大单体PDMS-MA的共聚合活性随其相对分子质量的增大而减小，随投料比的增加，共聚合转化率下降.与纯聚苯乙烯相比，PSt-g-PDMS的热稳定性提高.而且，随着大单体PDMS-MA相对分子质量和它在共聚物中含量的增加，接枝共聚物的热稳定性增加.

Abstract

Polystyrene-g-polydimethylsiloxane copolymers were prepared by using the methacryloxypropyl-polysiloxane(PDMS-MA) macromonomer technique.The structures of graft copolymers were characterized by Fourier transform infrared(FTIR) spectroscopy.The influence of molecular mass of PDMS-MA on copolymerization activity was investigated.Thermal properties of the graft copolymer were also studied.The reactivity of PDMS-MA decreased with increasing molecular mass. Meanwhile with increasing ratio of PDMS-MA to styrene

the copolymerization conversion of PDMS-MA decreased. The heat-resistance of PSt-g-PDMS was improved comparing to PSt alone.The improvement was greater when the molecular mass of PDMS-MA and its contents were increased.

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