DETERMINATION OF MOLECULAR-WEIGHT OF NONLINEAR POLYMERS BY NMR-SPECTROSCOPY - APPLICATION ON A POLYMER OF 2,2-BIS(4-CYANATOPHENYL)PROPANE

被引：18

作者：

FANG, T

机构：

[1] AT&T Bell Laboratories, Engineering Research Center, Princeton, NJ-08540

来源：

MACROMOLECULES | 1990年 / 23卷 / 21期

关键词：

Nuclear Magnetic Resonance - Plastics--Spectroscopic Analysis - Spectroscopy;

D O I：

10.1021/ma00223a010

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A general method for determining molecular weight of nonlinear polymers is developed based on the backbone to end group ratio measured by13C NMR spectroscopy. The number-average molecular weight (Mn) of the poly(cyanate ester) resin prepared from polycyclotrimerization of 2,2-bis(4-cyanatophenyl)- propane including the unreacted monomer is represented by the formula Mn = 834((R’ + R + 2)/(3R’-R + 2)) where R is the backbone to end group ratio and R’ is the monomer to end group ratio. Mathematical derivation of this equation is discussed. © 1990, American Chemical Society. All rights reserved.

引用

页码：4553 / 4556

页数：4

共 13 条

[1] UNIVERSALITY OF M[ETA] IN GEL-PERMEATION CHROMATOGRAPHY [J].