Thermo-oxidative stability of polyamide 6 films III.: Isothermal microcalorimetry

被引：14
作者：
Forsström, D
Svensson, LG
Terselius, B [1 ]
机构：
[1] Kristianstad Univ, Sch Engn, S-29188 Kristianstad, Sweden
[2] Royal Inst Technol, Dept Polymer Technol, S-10044 Stockholm, Sweden
[3] Celsius Mat CMK, S-69127 Karlskoga, Sweden
来源：
POLYMER DEGRADATION AND STABILITY | 2000年 / 67卷 / 02期
关键词：
polyamides; nylon 6 [25038-54-4; film; antioxidant; Irganox; 1098; radical scavenger; oven ageing; mechanical properties; embrittlement; oxidative stability; microcalorimetry; oxygen uptake; oxidation rate;
D O I：
10.1016/S0141-3910(99)00123-8
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Isothermal microcalorimetry (MC) was used to study the thermo-oxidative stability of polyamide 6 film in the temperature range of 100-130 degrees C. The heatflow was found to vary for ageing times beyond the embrittlement of the film samples. The heatflow curve was characterised by an initial peak and a sigmoidal increase through a maximum. Polyamide 6 stabilised with the phenolic antioxidant Irganox 1098 shows a similar heatflow time curve although shifted towards lower heatflow levels and longer times. A maximum in the heatflow curve was found to correspond to an accumulated heat energy in the range of 15-20 J g(-1), whereas a drop in strain at break occurred in the range of 45-55 J g(-1). Microcalorimetry was compared to oxygen uptake and chemiluminescence measurements. All of these techniques respond to oxidation but exhibit distinctly different rate time curves. (C) 2000 Elsevier Science Ltd. All rights reserved.
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收藏
页码：263 / 269
页数：7
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