Thermal analysis of polymer-silicate nanocomposites

被引：65

作者：

Kotsilkova, R

Petkova, V

Pelovski, Y

机构：

[1] Bulgarian Acad Sci, Cent Lab Physicochem Mech, BU-1113 Sofia, Bulgaria

[2] Bulgarian Acad Sci, Cent Lab Mineral & Crystallog, BU-1113 Sofia, Bulgaria

[3] Univ Chem Technol & Met, BU-1756 Sofia, Bulgaria

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2001年 / 64卷 / 02期

关键词：

DTA; DTG; interfacial effects; layered silicate-epoxy nanocomposites; multilayered structure; TG; thermal stability;

D O I：

10.1023/A:1011563521316

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The thermal behavior of epoxy-smectite nanocomposites (hybrids) is examined by non-isothermal thermogravimetry (TG, DTG and DTA) in air atmosphere. It has been shown that the thermal stability of hybrids is much greater than that of epoxy resin and strongly depends on both the smectite loading and the type of the gallery cations of organically modified smectites. The kinetics of degradation of nanocomposites is significantly influenced by the presence of smectites and proceeds in three stages. Stage I is attributed to the effect of quaternized ammonium ion exchanged smectite, as stages II and III are associated with the decomposition of the bulk epoxy resin. Because of the interfacial interactions and the silicate-polymer multilayered nanoscale organization, the nanocomposites act as excellent heat insulator and mass transport barrier, which shift the thermal decomposition peaks towards much higher temperatures.

引用

页码：591 / 598

页数：8