用不同量的端巯基液体聚硫橡胶(PSR)对酚醛环氧树脂(F-51)进行改性,合成F-51/PSR预聚物,并用3种不同的固化剂(聚酰胺固化剂PA650、环氧酚醛胺固化剂T-31、腰果壳油改性胺固化剂NX-5454)分别对其进行固化.用红外光谱(FT-IR)对F-51/PSR预聚物的分子结构进行了表征.通过对改性环氧固化物拉伸性能的测试和用扫描电子显微镜(SEM)对固化物断面形貌的分析,评价了该固化物的增韧效果并分析了其增韧机理.此外还通过差示扫描量热仪(DSC)和热重(TGA)对涂膜的固化行为与热稳定性能进行了研究.结果表明PSR可以有效增韧F-51树脂,采用NX-5454为固化剂,当m(PSR):m(F-51)=0.2时,涂膜柔韧性和干燥速度得到了最有效提高,断裂伸长率从6.42％增长到18.25％,室温下涂膜1.5h内表干,4.5h内实干,达到了快速固化的要求.
参考文献
| [1] | 石璞,向贤伟,王正祥,李福枝,刘跃军.常温快干环氧树脂金属底漆的研究[J].现代涂料与涂装,2007(01):1-3. |
| [2] | 涂料工业编委.涂料工艺(上册)[M].3版.北京:化学工业出版社,1997:646-653.,1997. |
| [3] | 李国荣,张慰盛,管从胜.重防腐涂料[M].北京:化学工业出版社,1999:28-29.,1999. |
| [4] | CADDY M,KEMP T J .Photoactive liquid polysulfides:preparation,characterzation,photocuring and potential applications[J].European Polymer Journal,2003,39(3):461-487.,2003. |
| [5] | ARUNDHATI,SINGHAL R,NAGPAL A K .Thermal and chemical resistance behavior of cured epoxy based on diglycidyl ether of bisphenol-A and thiol treated liquid polysulfide blends[J].Advanced Materials Letters,2010,1(3):238-245.,2010. |
| [6] | LIU B,WANG Y H .A novel design for water-based modified epoxy coating with anti-corrosive application properties[J].Progress in Organic Coatings,2014,77(1):219-224.,2014. |
| [7] | SPRENGER S .Epoxy resins modified with elastomers and surface-modified silica nanoparticles[J].Polymer,2013,54(18):4790-4797.,2013. |
| [8] | CHONKAEW W,SOMBATSOMPOP N,BROSTOW W .High impact strength and low wear of epoxy modified by a combination of liquid carboxyl terminated poly(butadieneco-acrylonitrile) rubber and organoclay[J].European Polymer Journal,2013,49(6):1461-1470.,2013. |
| [9] | TRIPATHI G,SRIVASTAVA D .Studies on the physicomechanical and thermal characteristics of blends of DGEBA epoxy,3,4 epoxy cyclohexylmethyl,3 ',4'-epoxycylohexane carboxylate and carboxyl terminated butadiene coacrylonitrile (CTBN)[J].Materials Science and Engineering A,2008,49(6):483-493.,2008. |
| [10] | THOMAS R,DURIX S,SINTUREL C,et al .Cure kinetics,morphology and miscibility of modified DGEBA-based epoxy resin-effects of a liquid rubber inclusion[J].Polymer,2007,48(6):1695-1710.,2007. |
| [11] | 赵祺,廖宏,马玉珍.聚硫橡胶对环氧胶粘剂的增韧作用研究[J].化学研究与应用,2009(03):432-434. |
| [12] | BLAINE R L,KISSINGER H E .Homer Kissinger and the Kissinger equation[J].Thermochimica Acta,2012,540(2):1-6.,2012. |
| [13] | 吴平章,戎宗明,陆冲,程树军,叶章基,苏雅丽,王胜龙.硅烷单体改性环氧树脂的固化及性能[J].涂料工业,2012(04):1-4. |
| [14] | 刘国际,张勇,刘伟,雒廷亮,徐丽.腰果酚的应用研究进展[J].材料导报,2012(09):90-94. |
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