新型含砜环氧树脂胶粘剂的研制  

Development of new type of sulfone-containing epoxy resin adhesive

作　　者：杨心雨 黄莉茜[1,2] 虞鑫海[3] Yang Xinyu;Huang Liqian;Yu Xinhai(College of Textiles,Donghua University,Shanghai 201620,China;Key Laboratory of Textile Science&Technology,Ministry of Education,Donghua University,Shanghai 201620,China;College of Chemistry and Chemical Engineering,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学纺织学院,上海201620 [2]东华大学纺织面料技术教育部重点实验室,上海201620 [3]东华大学化学与化工学院,上海201620

出　　处：《中国胶粘剂》2023年第7期22-27,共6页China Adhesives

摘　　要：采用热塑性含羧基聚合物(PDTD),对由含砜低聚物(BPA21)、环氧树脂、多功能环氧树脂制得的无溶剂胶粘剂体系进行改性。对改性胶粘剂的性能进行了测试分析,并探索了PDTD添加比例对环氧胶粘剂体系性能的影响。研究结果表明:加入PDTD的胶粘剂体系反应活性提高,且m(环氧树脂)∶m(PDTD)=100∶10时,反应速率最快,其保存时需要与固化剂分开保存;随着增韧剂比例的增加,胶粘剂体系黏度增加,成正相关关系,为便于涂覆,需控制其添加量;当m(环氧树脂)∶m(PDTD)=100∶10时,环氧树脂胶粘剂体系的拉伸剪切强度取得最高值10.74 MPa,比未加时提高了29%,充分达到了增韧的效果;添加PDTD会使得环氧树脂胶粘剂的介电性能有轻微下降,但是5种含不同比例增韧剂的胶粘剂都表现出良好的介电性能;5种含不同比例PDTD的胶粘剂吸水率都极低,拥有良好的疏水能力,其中当m(环氧树脂)∶m(PDTD)=100∶10和100∶8时,吸水率最低,适用于潮湿环境的保存和使用。综上所述,当m(环氧树脂)∶m(PDTD)=100∶10时,环氧树脂胶粘剂的黏度比较适中,体系反应活性较高,可较快固化,且拥有较优异的拉伸剪切力学性能,综合性能相对最好,为本次研究的相对最佳配方比例。The solvent-free adhesive system prepared from sulfone-containing oligomer(BPA21),epoxy resin,and multifunctional epoxy resin was modified by using thermoplastic carboxyl-containing polymer(PDTD).The performance of modified adhesive was tested and analyzed,and the effect of addition ratio of PDTD on the performance of epoxy adhesive system was explored.The research results showed that the reactivity of adhesive system with the addition of PDTD was increased,and when m(epoxy resin)∶m(PDTD)=100∶10,the reaction rate was the fastest,it needed to be stored separately from the curing agent during storage.With the increase of the proportion of toughening agent,the viscosity of adhesive system was increased in a positive correlation.In order to facilitate the coating,it was necessary to control its addition amount.When m(epoxy resin)∶m(PDTD)=100∶10,the tensile shear strength of epoxy resin adhesive system reached the highest value of 10.74 MPa,which was 29%higher than that without addition,fully achieving the toughening effect.The addition of PDTD could reduce slightly the dielectric properties of epoxy resin adhesive,but all five kinds of adhesive with different ratios of toughening agent showed good dielectric properties.Five kinds of adhesive containing different ratios of PDTD had extremely low water absorption rate and possessed good hydrophobicity,among which when m(epoxy resin)∶m(PDTD)=100∶10 and 100∶8,the water absorption rate was the lowest,making them suitable for storage and application in humid environment.In summary,when m(epoxy resin)∶m(PDTD)=100∶10,the viscosity of epoxy resin adhesive was relatively moderate,the system reactivity was high,it could be cured quickly and had excellent tensile shear mechanical properties,the overall performance was relatively the best,making it the relatively optimal proportion of the formula in this study.

关 键 词：热塑性含羧基聚合物 含砜环氧树脂胶粘剂 改性 性能 

分 类 号：TQ436[化学工程]