摘要
采用热聚合的方法制备了氮磷无卤阻燃剂M PP,用于阻燃玻纤增强尼龙6。通过在阻燃体系中引入成炭催化剂杂多酸(HPA)和阻燃改性剂(CR),成功地解决了玻纤增强尼龙6燃烧时的“烛芯效应”问题。系统研究了HPA和CR对玻纤增强尼龙6阻燃性能的影响。结果表明,所制备的阻燃剂M PP是由三聚氰胺聚磷酸盐和三聚氰胺焦磷酸盐构成,以前者为主。杂多酸和CR对M PP具有协效阻燃作用,加速了尼龙6燃烧时的成炭化学反应,改善了炭层结构。当在阻燃体系中添加2%的杂多酸和2%的CR时,玻纤增强尼龙6可达到UL 94 1.6 mm V-0级的阻燃性能,并具有良好的力学性能。
Nitrogen-phosphorus flame retardant （MPP） was prepared through thermal polymerization of melamine phosphate （MP） at a certain temperature. The obtained reaction product was then used to flame-retard the glass fiber（GF） reinforced nylon 6（PA6）. The problem of ‘candlewick effect’ related to the glass fiber was successfully solved by introduction of the char forming catalyst heteropolyacid（HPA） and the flame retardant modifier（CR） into the flame retarding system. Particularly, the effect of HPA and CR on the flame retardancy of the reinforced PA6 was systematically investigated. The experimental results show that the prepared flame retardant （MPP） is composed of melamine polyphosphate, which proves to be the main component, and melamine pyrophosphate. It is also found that HPA and modifier CR have a synergistic effect on MPP in flame-retardant glass fiber reinforced PA6. The synergistic mechanism was explained by the accelerated char forming reaction caused by the introduction of HPA and modifier CR and hence the improved structure of charred layer during combustion of material. Upon addition of 2% HPA and 2% modifier CR to the flame retarding system, the flame retarded GF reinforced PA6 can achieve UL 94 V-0 level at 1.6 mm thickness, and possesses good mechanical properties with tensile strengt3 of 81MPa and Young＇s modulus of 9767 MPa.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2006年第1期241-245,共5页
Polymer Materials Science & Engineering
基金
国家高技术研究发展计划(863)专项经费资助(2002AA333070)
关键词
尼龙6
玻纤增强
无卤阻燃剂
nylon 6
glass fiber reinforced
halogen free flame retardant
