concentration, light scattering and viscosity, enables us to evaluate experimental data by various computational procedures yielding n and weight-average molecular weight, w. Analysis of the results has shown that the universal calibration theorem has limited validity, apparently due to the dependence of...
Number average molecular weight, M n is dependent on the stoichiometry of a reaction in the case of polycondensation. Flory (D. J. Flory, Principles of Polymer Chemistry, Cornell University Press, Ithaca, NY, 1953, p. 92) has developed a relationship connecting the extent of reaction with ...
Techniques of using osmotic membranes to determine the number-average molecular weight of polymers by a dynamic method ☆doi:10.1016/0032-3950(68)90255-4I.M. KoshelevaM.M. KusakovElsevier B.V.Polymer Science U S S R
The length or size of a polymer molecule can be quantified by ___. A. The number of repeating units linked together in a polymer chain B. The degree of polymerization C. Number-average molecular weight D. Weight-average molecular weight 相关知识...
The increase in the average molecular weight of the epoxy-amine polymer is shown to be the main thermodynamic factor leading to phase separation. The competition between nucleation-growth and spinodal decomposition is analyzed. Low values ... D Verchère,H Sautereau,JP Pascault,... 被引量: 79...
The length or size of a polymer molecule can be quantified by _. A.The number of repeating units linked together in a polymer chainB.The degree of polymerizationC.Number-average molecular weightD.Weight-average molecular weight相关知识点: 试题来源: 解析 ABCD 反馈 收藏 ...
number average molecular weight 【化】 数均分子量 The number of prep...的数目 to the number of adv.达到...的数目,合计数为... number of package packages件数 number in 把...算作 in number adv.总共,在数字上 the number of prep...的数目 相似单词...
The present work deals with changes in the number average molecular weight (Mn) of PTFE irradiated at different temperatures. A decrease in Mn was observed and attributed to the scission of polymer chains. On the other hand, it was also observed that Mn decreased to a minimum value with ...
A sustained-release composition containing a lactic acid-glycolic acid polymer having a ratio or weight average molecular weight and number average molecular weight of about 1.90 or lower, or a salt thereof, and a physiologically active substance.Kazumichi Yamatomo...
The process can be advantageously practiced a reaction tempera ture of at least 60° C., preferably above 80° C., most preferably above 110° C., to achieve high number average molecular weight polymer having high o-olefin monomer and diene monomer contents with high diene conversion rates. ...