UV固化无溶剂型丙烯酸酯压敏胶的合成与性能表征

Synthesis and characterization of UV-curing non-solvent acrylic pressure-sensitive adhesive

摘要:

摘要：以丙烯酸酯单体丙烯酸异辛酯（2-EHA）、丙烯酸丁酯（BA）、甲基丙烯酸甲酯（MMA）和四氢化糠基丙烯酸酯（THFA），功能性单体丙烯酸（AA）和N,N-二甲基丙烯酰胺（DMAA），可聚合型光引发剂4-丙烯酰氧基二苯甲酮（ABP）和链转移剂十二烷基硫醇（NDM）为基本原料，通过本体聚合法制备了UV固化无溶剂型丙烯酸酯压敏胶（PSA）。分别探讨了两种功能单体AA和DMAA，光引发剂ABP和链转移剂NDM对UV固化无溶剂型丙烯酸酯PSA的性能影响。实验结果表明，当DMAA和AA用量分别为总单体质量的10%和2%时，PSA的120℃熔融粘度适中且粘接性能较优；光引发剂ABP适用于无溶剂型丙烯酸酯PSA体系，且用量为总单体质量的0.2%时，光固化效果最佳；当NDM用量为总单体质量的1.5%时， PSA综合性能最佳。

Abstract:

Abstract: UV curing non-solvent acrylic pressure-sensitive adhesives (PSA) were synthesized through bulk polymerization with 2-Ethylhexyl acrylate (2-EHA),Butyl Acrylate (BA),Methyl methacrylate (MMA) and Tetrahydrofurfuryl acrylate (THFA) used as acrylic monomers,acrylic acid (AA) and N,N-dimethylacrylamide (DMAA) used as functional monomers,4-acryloyloxy benzophenone (ABP) used as copolymerizable photoinitiators,2，2′-Azobisisobutyronitrile (AIBN) used as radical initiators and 1-dodecanethiol (NDM) used as chain transfer agent. The influences of functional monomers AA and DMAA, copolymerizable photoinitiators ABP and chain transfer NDM agent were discussed on performances of UV curing non-solvent acrylic pressure-sensitive adhesive (PSA). The other relative performances were then characterized. The results showed that when ω(DMAA)=10% and ω(AA)=2%,120℃ melt viscosity and the adhesive property of PSA were optimal; Copolymerizable photoinitiator ABP is suitable for the system of non-solvent acrylic PSA and PSA had the good UV-curing when mass fraction of ABP was 0.2%. The integrated properties of PSA are the best when mass fraction of NDM was 1.5%.