摘要
以聚氨酯树脂、丙烯酸酯单体结合引发剂(CHP)、促进剂(TMTU)等主要材料,通过热溶解法制备了建筑墙体环保装饰板用酯溶型复合胶粘剂。选择异佛尔酮二异氰酸酯作为固化剂,测试了不同制备温度、引发体系的物质用量、引发剂用量、丙烯酸酯类单体/聚氨酯树脂比例、固化温度和固化剂含量等条件下,胶粘剂的拉伸剪切强度、绝对黏度、涂膜性能、固化时间、断面形貌、热稳定性等性能。研究结果表明:(1)制备温度在45~55℃之间,胶粘剂的制备效果相对最好。选择由CHP-TMTU共同组成的引发体系,当w(CHP)=5%、w(TMTU)=4%时,胶粘剂的拉伸剪切强度可达到6.48MPa。(2)引发剂用量对胶粘剂的绝对黏度有显著影响,适当增加引发剂用量可以提高聚合反应速率和固含率,从而增加胶粘剂的黏度。(3)丙烯酸酯类单体/聚氨酯树脂比例对胶粘剂涂膜性能有显著影响,丙烯酸酯类单体的引入增加了交联度和硬段含量,从而提高了涂膜的硬度和耐冲击性。(4)固化温度和固化剂比例对胶粘剂的固化时间有明显的影响。添加固化剂后,胶粘剂具有更为韧性的断面特点,且胶粘剂在高温条件下表现出更高的热稳定性。
A ester-soluble composite adhesive for environmentally friendly decorative panel on building wall was prepared by thermal dissolution method using main materials such as polyurethane resin,acrylic monomer,combined with initiator(CHP),and accelerator(TMTU).Isophorone diisocyanate was selected as the curing agent,and the tensile shear strength,absolute viscosity,coating film properties,curing time,cross-sectional morphology,thermal stability,and other properties of the adhesive were tested under different preparation temperatures,mass amounts of initiator system,amounts of initiators,proportions of acrylic monomer/polyurethane resin,curing temperatures,and curing agent contents.The research results showed that,(1)The preparation temperature was between 45-55℃,and the preparation effect of the adhesive was relatively good.When choosing the initiation system composed of CHP-TMTU,the tensile shear strength of the adhesive could reach 6.48 MPa when w(CHP)=5%and w(TMTU)=4%.(2)The amount of initiator had a significant impact on the absolute viscosity of the adhesive.Increasing the amount of initiator appropriately could improve the polymerization reaction rate and solid content,thereby increasing the viscosity of the adhesive.(3)The proportion of acrylic monomer/polyurethane resin had a significant impact on the performance of adhesive coating film.The introduction of acrylic monomer increased the crosslinking degree and hard segment content,thereby improving the hardness and impact resistance of the coating film.(4)The curing temperature and curing agent ratio had a significant impact on the curing time of the adhesive.After adding the curing agent,the adhesive had a more resilient cross-sectional characteristic,and the adhesive exhibited higher thermal stability under high temperature conditions.
作者
卢真琮
谢翔宇
高帅
李成尧
高磊
Lu Zhencong;Xie Xiangyu;Gao Shuai;Li Chengyao;Gao Lei(The First Company of China Eighth Engineering Bureau Ltd.,Ji’nan 250100,Shandong,China;Guangzhou Hi-Tech Investment Group Co.,Ltd.,Guangzhou 510799,Guangdong,China)
出处
《中国胶粘剂》
CAS
2024年第7期59-64,共6页
China Adhesives
关键词
建筑墙体
环保装饰板
酯溶型
胶粘剂
固化剂
building wall
environmentally friendly decorative panel
ester soluble
adhesive
curing agent
