摘要
以丁香酚和环氧氯丙烷为原料经醚化反应合成了丁香酚环氧树脂(EER)。以FeCl_(3)·6H_(2)O、对苯二甲酸(H_(2)BDC)和N-苯基-3-氨基丙基三甲氧基硅烷(TPA)等为原料,通过载体修饰-浸渍法制备的Pt/TPA-MIL-88为催化剂,EER和七甲基三硅氧烷经非均相硅氢加成反应合成了丁香酚有机硅环氧树脂(ES-EP)。ES-EP与E-51环氧树脂混合后经固化反应制备了ES-EP/E-51固化物。采用FTIR、^(1)HNMR、万能试验机、冲击试验机、SEM、TGA、DSC、动态机械分析仪对ES-EP/E-51固化物进行了结构表征和性能测试,考察了m(ES-EP)∶m(E-51环氧树脂)(两者质量之和为10 g)对制备的ES-EP/E-51固化物的力学性能和热稳定性的影响。结果表明,当m(ES-EP)∶m(E-51环氧树脂)=10∶100时,制备的10%ES-EP/E-51固化物交联密度为2.79×10^(3) mol/m^(3),其拉伸强度、弯曲强度和冲击强度均达到最大值,分别为73.38、122.79 MPa和16.33 kJ/m^(2);ES-EP/E-51固化物的玻璃化转变温度随m(ES-EP)∶m(E-51环氧树脂)的增加而升高,并保持了良好的耐热性能。ES-EP中含有刚性的苯环结构和高稳定性Si—O—Si链段赋予ES-EP/E-51固化物较高的交联密度、优异的力学性能和热稳定性。
Eugenol epoxy resin(EER)was prepared through etherification of eugenol and epichlorohydrin.The Pt/TPA-MIL-88 catalyst was prepared by carrier modification-impregnation method using FeCl_(3)·6H_(2)O,terephthalic acid(H_(2)BDC),trimethoxy[3-(phenylamino)propyl]silane and other materials as raw materials.Then,EER went through heterogeneous hydrosilylation reaction with heptamethyltrisiloxane under the catalysis of Pt/TPA-MIL-88 to synthesize eugenol silicone epoxy resin(ES-EP),which was further mixed with E-51 epoxy resin to obtain ES-EP/E-51 cured products.The structure and properties of ES-EP/E-51 cured products were analyzed by FTIR,^(1)HNMR,universal testing machine,impact testing machine,SEM,TGA,DSC and dynamic mechanical analyzer.The effects of m(ES-EP)∶m(E-51 epoxy resin)(the total mass 10 g)on mechanical properties and thermal stability of ES-EP/E-51 cured products were investigated.The results showed that when m(ES-EP)∶m(E-51 epoxy resin)=10∶100,the prepared 10%ES-EP/E-51 cured product displayed a cross-linking density of 2.79×10^(3) mol/m^(3),with its tensile strength,flexural strength,and impact strength reaching the maximum values of 73.38,122.79 MPa,and 16.33 kJ/m^(2),respectively.Meanwhile,ES-EP/E-51 cured product exhibited a positive correlation between its glass transition temperature with the ratio of m(ES-EP)∶m(E-51 epoxy resin)and maintained good heat resistance.The ES-EP/E-51 cured product showed high cross-linking density,excellent mechanical properties and thermal stability,which were attributed to the rigid benzene ring structure and highly stable Si—O—Si segments contained in ES-EP.
作者
陈慕华
孙晨晖
嵇震
陈鹏
谈继淮
王芳
朱新宝
CHEN Muhua;SUN Chenhui;JI Zhen;CHEN Peng;TAN Jihuai;WANG Fang;ZHU Xinbao(College of Chemical Engineering,Nanjing Forestry University,Nanjing 210037,Jiangsu,China)
出处
《精细化工》
北大核心
2025年第3期678-683,696,共7页
Fine Chemicals
基金
国家自然科学基金项目(NSFC32171722)
国家重点研发计划项目(2022YFD2200802)。
关键词
非均相催化
丁香酚
有机硅环氧树脂
力学性能
热性能
原位增韧
建筑用化学品
heterogeneous catalysis
eugenol
organic silicone epoxy resin
mechanical properties
thermal properties
in situ toughening
building chemicals
