IDENTIFICATION OF OLIGOMERS IN THE REACTION OF POLYOLS WITH ISOCYANATES BY C-13-NMR AND GPC

被引：20

作者：

SEBENIK, A

OSREDKAR, U

VIZOVISEK, I

机构：

[1] Boris Kidric Inst of Chemistry, Ljubljana, Yugosl, Boris Kidric Inst of Chemistry, Ljubljana, Yugosl

来源：

JOURNAL OF MACROMOLECULAR SCIENCE-CHEMISTRY | 1986年 / A23卷 / 03期

关键词：

CHEMICAL REACTIONS - Reaction Kinetics - Glycols - Nuclear magnetic resonance - OLIGOMERS - Chromatographic Analysis;

D O I：

10.1080/00222338608063400

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Kinetics and mechanism of formation of urethane, biuret, allophanate, and isocyanurate in the synthesis of polyurethanes were studied by means of **1**3C-NMR and GPC. In the spectra, the regions of urethane, allophanate, biuret, and isocyanurate were used to study the mechanism of reaction between isocyanates and glycols under different reaction conditions. Urethane groups give signals between 153 and 156 ppm; isocyanurate groups between 149 and 151 ppm.

引用

页码：369 / 379

页数：11

共 6 条

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[3]

JOHNSON F, 1972, CARBON 13 NMR SPECTR

[4] STUDY OF THE REACTION BETWEEN ETHYLENE-GLYCOL OR 1,2-PROPYLENE GLYCOL WITH DIPHENYLMETHANE-4,4'-DIISOCYANATE [J].

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[5]

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[6]

WOODS G, 1982, FLEXIBLE POLYURETHAN, P3

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