Studies on Microemulsion Copolymerization of N-Butyl Maleimide and Styrene

Abstract

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 T_g and intrinsic viscosity of poly(NBMI-co-St)s were also investigated. The experiment results showed that the T_g 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

CLC Number:

O635

TrendMD:

ZHAO You-Liang, LI Hua-Ming, LIU Peng-Sheng  . Studies on Microemulsion Copolymerization of N-Butyl Maleimide and Styrene[J]. Chem. J. Chinese Universities, 2000, 21(9): 1477.

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Studies on Microemulsion Copolymerization of N-Butyl Maleimide and Styrene

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