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
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页码：355 / 363
页数：9
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