CELLULOSE MOLECULAR-WEIGHTS DETERMINED BY VISCOMETRY
CELLULOSE MOLECULAR-WEIGHTS DETERMINED BY VISCOMETRY
复制标题
DOI：
10.1002/app.1989.070370822
复制
发表时间：
1989-04-01
影响因子：
3
通讯作者：
WALLIS, AFA
中科院分区：
文献类型：
--
作者：
EVANS, R;WALLIS, AFA
标准方法 SCAN C15:62 中提出的用于根据纤维素样品在氢氧化铜（异丙苯）溶液中的特性粘度 ([η]) 估算其聚合度 (DP) 的方程，P0.905= 0.75 [η]/mL g−1，其中 P 是不确定的平均 DP，是不正确的。虽然几个实验室的实验结果之间的差异需要解决，但根据汇总数据以及从四氢呋喃 (THF) 中三氨基苯甲酸纤维素 (CTC) 的特性粘度到枯烯中纤维素特性粘度的换算，建议尝试性替代 (PV= 1.65 [η])。讨论了 Mark–Houwink–Sakurada 参数中统计误差的处理以及 log[η]−logPv 相关性的非线性。
The equation suggested in the standard method SCAN C15:62 for the estimation of the degree of polymerization (DP) of a cellulose sample from its intrinsic viscosity ([η]) in cupriethylenediamine hydroxide (cuene) solution,P0.905= 0.75 [η]/mL g−1, wherePis an indeterminate average DP, is incorrect. Although differences between the experimental results from several laboratories need to be resolved, a tentative replacement (PV= 1.65 [η]) is suggested, based upon the pooled data and a conversion from the intrinsic viscosity of cellulose tricarbanilate (CTC) in tetrahydrofuran (THF) to that of cellulose in cuene. The treatment of statistical errors in Mark–Houwink–Sakurada parameters, and the nonlinearity of the log[η]−logPvcorrelation are discussed.