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以丙烯酸异辛酯(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)为主要单体,以丙烯酸(AA)和N,N-二甲基丙烯酰胺(DMAA)为功能性单体,以4-丙烯酰氧基二苯甲酮(ABP)为光引发剂,以十二烷基硫醇(NDM)为链转移剂,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用量,光引发剂ABP和链转移剂NDM用量对PSA性能的影响。结果表明,当DMAA和AA用量分别为单体总质量的10%和2%时,PSA的120℃熔融黏度适中且粘接性能较优;光引发剂ABP用于PSA体系,且用量为单体总质量的0.2%时,光固化效果最佳;当NDM用量为单体总质量的1.5%时,PSA综合性能最佳。
The main monomers of 2-EHA, BA, MMA and THFA were synthesized with acrylic acid (AA) and N, N - Dimethyl acrylamide (DMAA) as functional monomer, using 4-acryloyloxybenzophenone (ABP) as photoinitiator and dodecylmercaptan (NDM) as chain transfer agent, UV curing solvent-free acrylic pressure-sensitive adhesive (PSA) was prepared by bulk polymerization. The effects of the dosage of AA and DMAA, the initiator ABP and the NDM of chain transfer agent on the performance of PSA were discussed respectively. The results show that PSA has good melt viscosity at 120 ℃ and good adhesion when the contents of DMAA and AA are 10% and 2% of the total monomers, respectively. The photoinitiator ABP is used in PSA system and the dosage is monomer When 0.2% of the total mass was used, the photocuring effect was the best. When the amount of NDM was 1.5% of the total mass of the monomer, the PSA performance was the best.