摘要
通过利用锥形量热仪（ Ｃ Ｏ Ｎ Ｅ）实验获得的热失重速率（ Ｍ Ｌ Ｒ）、热释放速率（ Ｈ Ｒ Ｒ）、有效燃烧热（ Ｅ Ｈ Ｃ）、烟释放速率（ Ｓ Ｐ Ｒ）和点燃时间（ Ｔ Ｔ Ｉ）等参数研究了氧化铜对 Ｐ Ｖ Ｃ热降解行为、阻燃和抑烟的影响。研究表明，氧化铜促进了 Ｐ Ｖ Ｃ早而快地脱 Ｈ Ｃｌ，并且明显降低了链段的裂解速度，促进了成炭量的增加。因此， Ｃｕ Ｏ 明显降低了 Ｈ Ｒ Ｒ 和 Ｓ Ｐ Ｒ，说明它具有良好的阻燃性和抑烟性。氧化铜使 Ｐ Ｖ Ｃ的点燃时间缩短，并使挥发物有利于气相燃烧反应。由于 Ｃｕ Ｏ 促进阴燃，从而导致总热释放量增加。
The effects of copper oxide on the thermal degradation, flame retardance, and smoke suppression of poly(vinyl chloride)(PVC) were investigated through various parameters such as MLR,HRR,EHC,SPR and TTI , etc, which were measured at an irradiance of 25 kW/m 2 from Cone calorimeter. The influence of CuO on PVC can be shown as follows : (1) promote the reaction of HCl elimination earlier and more quickly, and decrease the rate of segment pyrolysis;(2) enhance the amount of charformed;(3) decrease HRR,SPR and total smoke production significantly, compared with rigid PVC, and ability of flame retardance and smoke suppression increases with increasing add on of copper oxide;(4) shorten TTI of PVC;(5) volatiles produced by heating are easier to burn in the gas phase;(6) increase total heat release because copper oxide makes char afterglow.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1999年第5期124-127,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金
关键词
锥形
量热仪
聚氯乙烯
抑烟
氧化铜
阻燃
热解
cone calorimeter, poly(vinyl chloride), flame retardance, smoke suppression, copper oxide
