甲基硅油改性丙烯酸树脂乳液的合成与性能研究
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摘要
本论文以D4、KOH、DMSO、MM、KH-570为原料,通过聚合反应生成含有双键的有机硅低聚物;再以十二烷基苯磺酸钠为乳化剂,过硫酸氢钠为引发剂制备有有机硅改性丙烯酸树脂乳液。然后分别采用傅利叶红外光谱仪、粒径分析仪、热重分析仪等对不同硅含量的丙烯酸树脂乳液进行性能分析和结构表征。结果表明有机硅改性的丙烯酸树脂在1680~1550cm~(-1)区间有很强的吸收峰,说明C=C已经被成功引入;共聚法制出的丙烯酸树脂在一定温度范围内它的失重率小于物理共混法制得的,进而说明其热稳定性更好;对其进行性能分析结果显示出:在有机硅含量为2%时,乳液的耐酸性最好;在有机硅含量为8%时,样品耐碱性最优;在有机硅含量为6%时,乳液的耐热性最强。粒径分析结果显示:化学共聚法优于物理共混法,当有机硅含量为6%时,乳液的稳定性最小。
Used D4,KH-570 and MM as raw materials,catalyzed by KOH and promoted by DMSO,organosilicon with double bond prepolymers were synthesized by polymerization in this paper,and organic siliconemodified acrylic resin emulsion were prepared by co-polymerization with sodium dodecylbenzenesulfonate as emulsifier,sodium hydrogen persulfate as the initiator and silicone prepolymer as monomer.The samples were characterised and analysised by the Fourier infrared spectroscopy(FTIR),thermogravimetric analyzer(TGA)and performance testing,the results showed copolymer of silicone-modified legal acrylic resins had strong absorption peaks at 1680~1550 cm~(-1),indicating organic silicon monomer copolymer with C=C bond was successed,and the weightlessness rate of the chemical copolymerization of the acrylic resin was less than the physical blending polymeriza-tion at a certain temperature range,which thermal stability was better;and the emulsions had prefect the acid resistance when the silicone content was 2%,and the emulsion had optimal alkali resistance when silicone content was 8%;and the emulsion had strongest heat resistance when silicone content was 6%.Particle size analysis results showed that chemical copolymerization method was better than that of physical blending method. When the organic silicon content was 6%,the stability of the emulsion was minimal.
Used D4,KH-570 and MM as raw materials,catalyzed by KOH and promoted by DMSO,organosilicon with double bond prepolymers were synthesized by polymerization in this paper,and organic siliconemodified acrylic resin emulsion were prepared by co-polymerization with sodium dodecylbenzenesulfonate as emulsifier,sodium hydrogen persulfate as the initiator and silicone prepolymer as monomer.The samples were characterised and analysised by the Fourier infrared spectroscopy(FTIR),thermogravimetric analyzer(TGA)and performance testing,the results showed copolymer of silicone-modified legal acrylic resins had strong absorption peaks at 1680~1550 cm~(-1),indicating organic silicon monomer copolymer with C=C bond was successed,and the weightlessness rate of the chemical copolymerization of the acrylic resin was less than the physical blending polymeriza-tion at a certain temperature range,which thermal stability was better;and the emulsions had prefect the acid resistance when the silicone content was 2%,and the emulsion had optimal alkali resistance when silicone content was 8%;and the emulsion had strongest heat resistance when silicone content was 6%.Particle size analysis results showed that chemical copolymerization method was better than that of physical blending method. When the organic silicon content was 6%,the stability of the emulsion was minimal.
引文
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[2]Andryustchenko L A,Kudin A M,Goriletsky V I,et al.Functional possibilities of organosilicon coatings on the surface of Cs I-based scintillators[J].Nucl Instrum Methods Phys Res Sect A,2002,48(1/2):40-47.
[3]Marukha M V,Gnyp I P.Anticorrosive temperature-resistant organosilicon coatings with compacted mineral fillers[J].Mater Science,2004,40(1):89-93.
[4]薛健.有机硅创新技术在涂料中的应用[J].上海涂料,2004,42(5):1-5.
[5]杨凯,曹光群,杨成.乳液聚合法制备有机硅树脂乳液的研究[J].化工新型材料,2008,36(11):62-64.
[6]张平,王明利,管晶.羟基硅油乳液的合成[J].纺织高校基础科学学报,2009,22(2):241-244.
[7]Hu Liang,Zhang Chaocan,Chen Yanjun,et al.Synthesis and silicon gradient distribution of emulsifier-free TRIS-containing acrylate copolymer[J].Colloids and Surfaces A:Physicochem Eng Aspects,2010,37(8):72-78.
[8]马建中,王华金,鲍艳.核壳型硅丙复合乳液的合成及性能研究[J].精细化工,2010,27(2):195-200.
[9]龚兴宇,解云川,张乾,等.高硅烷含量硅丙复合乳液的性能及应用研究[J].涂料工业,2002,32(5):6-9.