高等学校化学学报 ›› 1989, Vol. 10 ›› Issue (10): 1065.

• 研究简报 • 上一篇    下一篇

氯醇橡胶溶液性质的研究

李后强, 陈德本, 贺建业, 黄光琳   

  1. 四川大学化学系
  • 收稿日期:1988-03-18 出版日期:1989-10-24 发布日期:1989-10-24
  • 通讯作者: 李后强

Studies on Solution Properties of Polyepichlorohydrin

Li Houqiang, Chen Deben, He Jianye, Huang Guanglin   

  1. Department of Chemistry, Sichuan University, Chengdu
  • Received:1988-03-18 Online:1989-10-24 Published:1989-10-24

关键词: 氯醇橡胶, Mark-Houwink方程, 无扰分子参数, 小角激光光散射法

Abstract: This paper presented the fractionation of the amorphous polyepichlorohydrin sample with a high molecular weight by reprecipitation with toluene as the solvent and ethyalcohol as the precipitant (50℃).The intrinsic viscosities [η] of the narrow distribution fractions in the solvents cyclohexanone (35℃) and tetrahydrofuran (25℃) were determined, the average values of the constants of Huggins equation and kraemer equation were obtained by calculation as K' = 0.360,β=0.146(in THF) ; K' = 0.356,β=0.148 (in cyclohexanone).The weight-average molecular weight of the fractions were measured experimentally by the low angle laser light scattering (LALLS) photometer, and the Mark-Houwink equations were calibrated as [η]= 2.37 × 10-5Mw0.79(dL/g,THF, 25℃), [η]= 1.36 × 10-5Mw0.85 (dL/ g, cyclohexanone, 35℃).The unperturbed parameters of molecular chains of polyepichlorohydrin were obtained according to the stockmayer-Fixman equation, k0= 5.25 ×10-4 (dL/g),σ=l.57,C = 4.91(THF,25℃);k0= 4.97× 10-4(dL/g), σ=l.54,C = 4.73(cyclohexanone, 35 ℃).

Key words: Polyepichlorohydrin, Mark-Houwink equation, Unperturbed molecular parameter, Low angle laser light scattering

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