聚氨酯胶粘剂热稳定性研究进展

聚氨酯胶粘剂具有化学粘合力强、耐超低温、耐磨、耐溶剂等优点,在航天、建筑、电子工业等领域应用广泛。但是聚氨酯胶粘剂存在热稳定性差的缺陷,通过改性方法可以提高其热稳定性。围绕交联改性(与丙烯酸酯类单体、环氧类树脂及异氰酸酯三聚体共聚)、引入耐热基团(引入苯环、硅氧键、酰亚胺及碳硼烷)、与无机纳米材料(纳米二氧化硅、纳米黏土及纳米碳材料)复合这3种改性方法,综述了近年来国内外聚氨酯胶粘剂热稳定性的研究进展,并对提高聚氨酯胶粘剂热稳定性的研究方向进行了展望。

Research progress on thermal stability of PUR adhesive

Polyurethane(PUR)adhesive has the advantages of strong chemical adhesion,ultra-low temperature resistance,abrasion resistance,solvent resistance,etc.,and is widely used in aerospace,construction and electronics industry.However,PUR adhesives have the defect of poor thermal stability,and it can be improved by modification methods.The research progress of the thermal stability of PUR adhesives at home and abroad in recent years was reviewed around three modification methods including crosslinking modification(copolymerization with acrylate monomers,epoxy resins and isocyanate trimers),the introduction of heat-resistant groups(the introduction of benzene ring,silicon-oxygen bond,imide and carbon borane),composite with inorganic nano materials(nano silica,nano clay and nano carbon materials).The development trend of improving the thermal stability of PUR adhesives was prospected.