高等学校化学学报

高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (9): 1477.

• 论文 • 上一篇    下一篇

N-丁基马来酰亚胺/苯乙烯微乳液共聚合研究

赵优良, 黎华明, 刘朋生   

  1. 湘潭大学化学化工学院, 湘潭 411105
  • 收稿日期:1999-06-02 出版日期:2000-09-24 发布日期:2000-09-24
  • 通讯作者: 刘朋生(1937年出生),男,教授,博士生导师,主要从事高分子材料合成及应用研究.
  • 基金资助:

    湖南省科学技术委员会基金(批准号:97JKY-1016-3)资助

Studies on Microemulsion Copolymerization of N-Butyl Maleimide and Styrene

ZHAO You-Liang, LI Hua-Ming, LIU Peng-Sheng    

  1. College of Chemistry and Chemical Engineering, Xiangtan University, Xiangtan 411105, China
  • Received:1999-06-02 Online:2000-09-24 Published:2000-09-24

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摘要： 研究了氘代氯仿中N-丁基马来酰亚胺(NBMI)和苯乙烯(St)的络合性能.以十二烷基硫酸钠(SDS)和正戊醇(PTL)为复合乳化剂,配制了含有NBMI(M1)和St(M2)的O/W微乳液.用过硫酸钾引发该体系进行微乳液共聚合.固定乳化剂的浓度为[SDS]=0.21mol/L,[PTL]=0.28mol/L,详细研究了聚合温度、单体配比和引发剂用量对共聚合动力学的影响.用元素分析法确定共聚物的组成,进而求算出两种单体的竞聚率(r1=0.05,r2=0.08).热分析结果显示,当单体组成比f1=0.4～0.7时,共聚物的玻璃化转变温度基本恒定(Tg=421.6K).实验结果表明,当单体配比在一定范围内(f1=0.4～0.7)变化时,用微乳液聚合法制备的N-丁基马来酰亚胺/苯乙烯共聚物具有交替共聚结构.

关键词: N-丁基马来酰亚胺, 苯乙烯, 微乳液共聚合, 共聚动力学, 竞聚率

Abstract: The complexion properties of N-butyl maleimide(NBMI) and styrene(St) in CDCl3 were studied firstly. By using sodium dodecyl sulfate(SDS) and pentanol(PTL) as emulsifier, the oil-in-water microemulsion containing NBMIand St was prepared. The microemulsion copolymerization was carried out in ampoules with potassium persulfate(KPS) as initiator. The effects of reaction temperature, molar fraction of monomer and initiator concentration on the copolymerization kinetics were studied in detail under the condition of keeping the emulsifier concentration at 0.21 mol/L SDSand 0.28 mol/L PTL. Monomer reactivity ratios of comonomer pairs were determined by a Lewis and Mayo method. Meanwhile, the effects of monomer feed on the Tg and intrinsic viscosity of poly(NBMI-co-St)s were also investigated. The experiment results showed that the Tg of alternating poly(NBMI-co-St) was 421.6 K, and the monomer reactivity ratios of NBMI(M1) and St(M2) were 0.05(r1) and 0.08(r2), respectively. Moreover, it was found that the resulting copolymer was of alternating structure when the molar fraction of NBMI(f1) varied from 0.4 to 0.7.

Key words: N-Butyl maleimide, Styrene, Microemulsion copolymerization, Kinetics of copolymerization, Monomer reactivity ratios

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