THERMAL-STABILITY OF IRRADIATED LDPE-I-PP FILMS

被引：6

作者：

MINKOVA, L ^{[1
]}

LEFTEROVA, E ^{[1
]}

KOLEVA, T ^{[1
]}

机构：

[1] CENT INST COMP TECHNIQUE & TECHNOL,SOFIA,BULGARIA

来源：

POLYMER DEGRADATION AND STABILITY | 1992年 / 37卷 / 03期

关键词：

D O I：

10.1016/0141-3910(92)90166-3

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 kinetic parameters of the non-isothermal decomposition of films of LDPE, i-PP and their blends of various compositions, irradiated with fast electrons in the dose range 5-16 Mrad, have been investigated by the TG and DTG methods. The DTG curves of the non-irradiated and irradiated films of the polymer blends are monomodal like those of the pure components. The initial decomposition temperature, the temperature of 50% weight loss, the degree of conversion at 450-degrees-C and the activating energy of decomposition of LDPE films do not depend on irradiation. The PP films irradiated with doses of 5-16 Mrad show low thermal stability. The kinetic parameters of non-isothermal decomposition of irradiated LDPE-i-PP films depend only slightly on their composition and are almost equal to those of i-PP films. It has been assumed that the low thermal stability of irradiated LDPE-i-PP films is due to an activation of part of the PP free radicals on heating.

引用

页码：247 / 251

页数：5

共 17 条

[1] RADIATION DEGRADATION OF POLYPROPYLENE - IMMEDIATE AND LONG-TERM EFFECTS ON AVERAGE MOLECULAR-WEIGHTS [J].