Ozonolysis of 1,4-cis-polyisoprene and 1,4-trans-polyisoprene in solution

被引：23

作者：

Anachkov, MP ^{[1
]}

Rakovski, SK ^{[1
]}

Stefanova, RV ^{[1
]}

机构：

[1] Bulgarian Acad Sci, Inst Catalysis, BU-1113 Sofia, Bulgaria

来源：

POLYMER DEGRADATION AND STABILITY | 2000年 / 67卷 / 02期

关键词：

ozonolysis; 1,4-cis-polyisoprene; 1,4-trans-polyisoprene; solution; ozone degradation;

D O I：

10.1016/S0141-3910(99)00137-8

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The reaction of ozone with 1,4-cis-polyisoprene (E-IR) and 1,4-trans-polyisoprene (Z-IR) has been investigated in CCl4 solution. By means of IR-spectroscopy and H-1-NMR spectroscopy it was established that the basic ozonolysis products of both elastomers are ozonides, ketones, and aldehydes. The ozonide:ketone:aldehyde ratio, obtained from NMR spectra, was 40:37:23 and 42:39:19 for E-IR and Z-IR, respectively. In addition to the specified functional groups, epoxide groups were also found, their amount being 8 and 7% for E-IR and Z-IR, respectively, in relation to reacted ozone. Based on differential scanning calorimetry analysis of partially ozonized elastomers, the enthalpy of the ozonide thermal decomposition of the two investigated polyisoprenes was evaluated. A reaction mechanism is proposed, which explains the formation of all identified functional groups. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：355 / 363

页数：9