丙烯酸酯液体光学胶的制备与性能
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Study on Liquid Optical Acrylic Adhesive and Its Properties
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    摘要:

    摘要: 以丙烯酸、3,3,5-三甲基环己醇为原料,甲苯为携水剂,对甲苯磺酸为催化剂,采用直接酯化法合成丙烯酸酯。最优化的工艺条件为:对甲苯磺酸质量浓度为1.0%,酸醇摩尔比为1.2,反应温度为125℃,转化率最高达到94.86%。采用半连续工艺,以丙酮为溶剂,偶氮二异丁腈(AIBN)为引发剂,十二烷基硫醇为链转移剂,制备出粘度合适的丙烯酸酯预聚物。实验表明:在AIBN为反应单体总质量1%,十二烷基硫醇为反应单体总质量2%,温度为75℃时,合成出粘度为12000mPa•s的聚丙烯酸酯树脂。用该预聚物为基体,丙烯酸异冰片酯(IBOA)和二缩三丙二醇二丙烯酸酯(TPGDA)为活性稀释剂、1-羟基环己基苯基甲酮(184)为自由基光引发剂,调配出性能优异光学胶。当活性稀释剂质量分数为40%,质量比m(TPGDA):m(IBOA)=3:1时,液体光学胶固化后折射率达到了1.486。 关键词:丙烯酸酯、预聚物、光学胶、折射率

    Abstract:

    Abstract:Acylic trimethylcyclohexanol ester was synthesized from acrylic acid and 3,3,5 – trimethylcyclohexanol, while the methylbenzene worked as water carrying agent, the p-toluenesulfonic acid worked as catalyst.When the mass ratio of the p-toluenesulfonic acid was at 1.0% to the whole mass of reactants, the mole ratio of acylic acid to trimethylcyclohexanol was at 1.2, and the reaction temperature was at 125℃, the optimum conversion of the reaction could reach 94.86%. Moreover, an acrylate prepolymer was synthesized through semi-batch solution polymerization process in acetone, with AIBN as thermal initiator and 1-dodecanethiol (NDM) as chain transfer agent. It was concluded that the optimum process conditions were as follow: to the whole mass of monomer, the mass ratio of 2,2'-Azobis(2-methylpropionitrile) (AIBN) at 1%, 1-dodecanethiol at 2%, the temperature at 75℃. The acylic trimethylcyclohexanol ester prepolymer was synthesized with a viscosity of 12000mPa•s. Finally, an adhesive was prepared by the prepolymer, 1 - hydroxy cyclohexyl phenyl ketone, acrylic acid isobornyl ester(IBOA) and tri(propylene glycol) diacrylate( TPGDA). It has been revealed that the refractive index of the cured adhensive could reach 1.48 when the mass concentration of reactive thinning agent was 40%, and the mass ratio of TPGDA to IBOA was 3. Keywords: Acylate, Prepolymer, Optical clear adhesive, Refractive index

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潘朝群.丙烯酸酯液体光学胶的制备与性能[J].精细化工,2015,32(2):

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  • 收稿日期:2014-05-05
  • 最后修改日期:2014-11-24
  • 录用日期:2014-11-26
  • 在线发布日期: 2015-01-07
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