高等学校化学学报 ›› 1989, Vol. 10 ›› Issue (10): 1065.
• 研究简报 • 上一篇 下一篇
李后强, 陈德本, 贺建业, 黄光琳
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Li Houqiang, Chen Deben, He Jianye, Huang Guanglin
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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
TrendMD:
李后强, 陈德本, 贺建业, 黄光琳. 氯醇橡胶溶液性质的研究. 高等学校化学学报, 1989, 10(10): 1065.
Li Houqiang, Chen Deben, He Jianye, Huang Guanglin . Studies on Solution Properties of Polyepichlorohydrin. Chem. J. Chinese Universities, 1989, 10(10): 1065.
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http://www.cjcu.jlu.edu.cn/CN/Y1989/V10/I10/1065