摘要
采用对苯二甲酰氯与丙二胺通过低温溶液法合成了一种半芳香族聚酰胺(PPTA)成炭剂,研究了反应温度、反应时间、单体摩尔比等因素对产物产率和比浓黏度的影响。确定了PPTA的最佳合成工艺:预聚温度0℃,单体摩尔比(丙二胺∶苯二甲二酰氯)1.05∶1,助溶盐CaCl2用量4 g/100 mL溶剂,单体浓度0.7 mol/L,聚合时间4 h。用傅里叶红外、核磁共振氢谱和热失重分析方法对产物进行了表征。探讨了以PPTA为碳源,聚磷酸铵(APP)为酸源的膨胀型阻燃体系(IFR)对ABS的成炭阻燃效应。结果表明,PPTA的热分解性能与ABS的分解温度较为匹配,可显著提高ABS/APP阻燃体系在高温下的残炭量和阻燃性能。SEM形貌显示PPTA的加入能促进阻燃体系在燃烧后表面形成均匀、致密的炭层结构。
A charring agent semi-aromatic polyamides（PPTA） was synthesized via terephthaloyl chloride and 1,3-propanediamine through solution polycondesation at low temperature.The effects of reaction temperature,reaction time,and material ratios et al.on the inherent viscosity and yield of PPTA were investigated.The optimized synthesis conditions for PPTA were the polymeration temperature of 0 ℃,CaCl2 content of 4 g/100 mL solvent,reaction time of 4 h,monomer concentration of 0.7 mol/L,and material ratio（1,3-propanediamine∶terephthaloyl chloride）of 1.05∶1,respectively.The product was characterized by FTIR,1HNMR and TG tests.The effect of the intumescent flame retardant（IFR）,comprised of PPTA for carbon sources and ammonium polyphosphate（APP） for acid sources,on ABS was studied.The results showed that the thermal degradation property of PPTA is similar to that of ABS and PPTA improved the flame retardancy and weight of residues at high temperature of ABS/APP system.SEM indicated that PPTA could promote the formation of compact intumescent charred layers in IFR-ABS system after burning.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2012年第1期177-182,共6页
Journal of Sichuan University (Engineering Science Edition)
关键词
半芳香族聚酰胺
成炭剂
膨胀型阻燃
semi-aromatic polyamides
charring agent
intumescent flame retardant
