UV固化脂环族环氧树脂体系的设计及其响应面优化

Design of UV-curable Alicyclic Epoxy Resin System and Optimization of Its Response Surface

为了明确光敏剂的种类及用量对脂环族环氧树脂3,4-环氧环己基甲基-3,4-环氧环己基甲酸酯(TTA-21)固化特性、透光性和力学性能的影响,采用差示扫描量热法(DSC)和紫外可见光光度计探究了2-异丙基硫杂蒽酮(ITX)、安息香二甲醚(BDK)、1-羟环己基苯酮(184)及其用量对脂环族环氧树脂TTA-21(4-乙烯基环氧环己烷为稀释剂,三苯基六氟锑酸盐为光引发剂)薄膜固化程度和透光率的影响。在此基础上进一步分析了二((3,4-环氧环己基)甲基)己二酸酯(TTA-26)和三羟甲基丙烷三缩水甘油醚(TPEG)对TTA-21固化物薄膜拉伸强度的作用规律。利用Box-Behnken响应面分析法对体系中TTA-26、TPEG和稀释剂的含量进行了优化。研究表明,在脂环族环氧树脂体系中光敏剂BDK的添加量为1%时,薄膜固化率可达98.12%,透光率可达86%以上;TPEG和TTA-26在固化体系中的添加量均为20%时,固化薄膜的拉伸强度分别为46.80 MPa和42.78 MPa,断裂伸长率分别为11.2%和13.7%;稀释剂添加量为30%时,固化薄膜的拉伸强度可达到最高值57.14 MPa。各响应因子对拉伸强度的影响强弱顺序为稀释剂(C)>TTA-26(A)>TPEG(B),响应面法优化最佳工艺为TTA-26添加量24.75%、TPEG添加量20.65%、稀释剂添加量18.70%,在此条件下固化薄膜的拉伸强度可达58.97 MPa。

In order to clarify the effects of the type and dosage of photosensitizer on the curing properties,light transmittance and mechanical properties of 3,4-epoxy cyclohexylmethyl-3,4-epoxy cyclohexylformate(TTA-21)of aliphatic group epoxy resin,differential scanning calorimetry(DSC)and UV-visible photometer were used to investigate the effects of 2-isopropylthioxanone(ITX),benzoin dimethyl ether(BDK),1-hydroxycyclohexylphenone(184)and their dosages on the diluent of atyclic epoxy resin TTA-21(4-vinyl epoxy cyclohexane).Effect of triphenylhexafluoroantimonate as photoinitiator on curing degree and light transmittance of films.On this basis,the effects of bis(3,4-epoxycyclohexylmethyl)adipate(TTA-26)and trimethylolpropane triglycidyl ether(TPEG)on the TTA-21 cured film were further analyzed.The law of tensile strength.The Box-Behnken response surface analysis method was used to optimize the content of TTA-26,TPEG and diluent in the system.Research shows that when the photosensitizer BDK is 1% in the cycloaliphatic epoxy resin system,the film curing rate can reach 98.12%,and the light transmittance can reach more than 86%.When the addition amount of TPEG and TTA-26 is 20%,the tensile strength and elongation at break are 46.80 MPa and 42.78 MPa,respectively,and 11.2% and 13.7%,respectively.When the amount of diluent is 30%,the tensile strength of the cured film can reach the highest value of 57.14 MPa.The order of the influence of each response factor on tensile strength is diluent(C)>TTA-26(A)>TPEG(B);The optimized process by response surface methodology is TTA-26 addition amount 24.75%,TPEG addition the amount is 20.65%,and the amount of diluent is 18.70%.Under these conditions,the tensile strength of the cured film can reach 58.97 MPa.