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本文在Ambler方法和kraus方法的基础上,用GPC-级分特性粘数法来测定聚合物的长链支化度,能同时以g_i、λ_i、G_i、m_i、支化重量百分数等支化参数来表征聚合物的支化分布、支化程度和支化含量等;得到了相应的计算gi、λi、[η]_i等有关的计算公式和计算方法;还研制成了以光导纤维为冷光源的高精度光电自动计时毛细管粘度计和60小时内恒温精度优于±5×10~(-4)℃的超级恒温水浴,使计时精度达到≤±4×10~(-3)秒;并以国产和进口的镍系顺丁橡胶为例,讨论了分子量和支化度多分散性之间的某些关系;从而确定了该法比较合理地、全面地相对比较聚合物的长链支化度。
Based on the Ambler method and the kraus method, GPC-FTIR was used to determine the degree of long-chain branching. The branching parameters such as g_i, λ_i, G_i, m_i, The branching distribution, degree of branching and branching content of the polymer were characterized. Corresponding calculation formulas and calculation methods of gi, λi, [η] _i and so on were also obtained. The optical fiber with cold light source Precision high-precision photoelectric capillary capillary viscometer and within 60 hours, the thermostatic accuracy is better than ± 5 × 10 ~ (-4) ℃ super-constant temperature water bath, so that the timing accuracy of ≤ ± 4 × 10 -3 seconds; and to Domestic and imported nickel-based butadiene rubber as an example, the relationship between molecular weight and degree of branching degree polydispersity was discussed. It was confirmed that the method was relatively rational and comprehensive comparative long-chain branching degree .