硅溶胶杂化改性环氧固化材料性能研究
|
摘要
正硅酸乙酯在碱性条件下常温水解得到硅溶胶杂化物,并进而通过硅溶胶杂化改性方法制备了一系列改性环氧树脂。通过对化学改性产物的红外光谱、环氧值的测定,表明杂化改性方法能将硅溶胶成功引入到环氧树脂中。将所得改性环氧树脂用异佛尔酮二胺(IPDA)固化,对所得固化物的阻燃性、玻璃化转变温度(T_g)、热稳定性、拉伸强度及断裂伸长率、微观结构进行了分析测定,探讨了化学改性与物理混合方法、硅溶胶含量等对材料性能的影响。结果表明:经过化学反应得到的改性环氧树脂具有更加优良的性能,固化产物的极限氧指数、热稳定性明显高于纯环氧树脂,拉伸强度等力学性能得到大幅度提高,达到了同时提高环氧材料的阻燃性、耐热性能和力学性能的目标。
silica sol hybrid was synthesized by the hydrolysis reaction of ethyl silicate(TEOS) at 25℃ under alkaline conditions.Then a series of modified epoxy resins were successfully prepared by using the silica sol hybrid. IR spectrum, epoxy value indicated that the silica sol hybrid is incorporated into epoxy resin. The modified epoxy resin was cured with isophorone diamine(IPDA), Then investigated the cured materials via measuring the flame retardancy, glass transition temperature(T_g), thermal stability, tensile strength and elongation, microstructure of the cured materials, The effects of chemical modification, physical mixing and the content of the TOES on the properties of the composites were discussed. The results show that the modified epoxy resin obtained by chemical reaction has better performance. The limiting oxygen index and thermal stability of the cured product are obviously higher than that of pure epoxy resin, and the tensile strength and other mechanical properties have been greatly improved, which achieved that the flame retardant, heat resistance and mechanical properties of the epoxy materials were increased at the same time.
silica sol hybrid was synthesized by the hydrolysis reaction of ethyl silicate(TEOS) at 25℃ under alkaline conditions.Then a series of modified epoxy resins were successfully prepared by using the silica sol hybrid. IR spectrum, epoxy value indicated that the silica sol hybrid is incorporated into epoxy resin. The modified epoxy resin was cured with isophorone diamine(IPDA), Then investigated the cured materials via measuring the flame retardancy, glass transition temperature(T_g), thermal stability, tensile strength and elongation, microstructure of the cured materials, The effects of chemical modification, physical mixing and the content of the TOES on the properties of the composites were discussed. The results show that the modified epoxy resin obtained by chemical reaction has better performance. The limiting oxygen index and thermal stability of the cured product are obviously higher than that of pure epoxy resin, and the tensile strength and other mechanical properties have been greatly improved, which achieved that the flame retardant, heat resistance and mechanical properties of the epoxy materials were increased at the same time.
引文
[1]Kim J,Yoo S,Bae J Y,et al.Polym Degrad Stabil,2003,81(2):207~213.
[2]Toldy A,Anna P,Csontos I,et al.Polym Degrad Stabil,2007,92(12):2223~2230.
[3]Balabanovich A L,Luda M P,Operti L.J Fire Sci,2005,23(3):227~245.
[4]Liu YL,Wu CS,Hsu KY.Polym Sci,Part A:PolymChem,2002(40)∶2329~2339
[5]Wu CS,Liu YL.Polym Degrad Stabil,2002(78)∶41~48
[6]Lu W,Schmidt H.J Eur Ceram Soc,2005,25(6):919~925.
[7]Park S J,Jin F L,Park J H.Mat Sci Eng A,2005,399(1-2):377~381.
[8]吕文晏,程俊华,闻荻江.材料导报,2011,(s1):411~414.
[9]杨锐.有机硅改性环氧树脂增韧研究及其在涂料中的应用.山西:中北大学,2007.
[10]郑亚萍,马瑞,夏印平.热固性树脂,2005,20(3):39~41.
[11]Chru?ciel J J,Leniak E.Prog Polym Sci,2015,41:67~121.
[2]Toldy A,Anna P,Csontos I,et al.Polym Degrad Stabil,2007,92(12):2223~2230.
[3]Balabanovich A L,Luda M P,Operti L.J Fire Sci,2005,23(3):227~245.
[4]Liu YL,Wu CS,Hsu KY.Polym Sci,Part A:PolymChem,2002(40)∶2329~2339
[5]Wu CS,Liu YL.Polym Degrad Stabil,2002(78)∶41~48
[6]Lu W,Schmidt H.J Eur Ceram Soc,2005,25(6):919~925.
[7]Park S J,Jin F L,Park J H.Mat Sci Eng A,2005,399(1-2):377~381.
[8]吕文晏,程俊华,闻荻江.材料导报,2011,(s1):411~414.
[9]杨锐.有机硅改性环氧树脂增韧研究及其在涂料中的应用.山西:中北大学,2007.
[10]郑亚萍,马瑞,夏印平.热固性树脂,2005,20(3):39~41.
[11]Chru?ciel J J,Leniak E.Prog Polym Sci,2015,41:67~121.