Although polyurethane pressure-sensitive adhesives (PSAs) have been widely used, there are still some deficiencies in adhesion and heat resistance. To make up for these shortcomings, rosin is introduced into polyurethane/polysiloxane copolymer to improve its heat resistance and adhesion, while its hydrophobicity is also improved. The vinyl-terminated polyurethane/polysiloxane copolymer is synthesized by a one-pot polymerization method, and finally PSA with different content of rosin is obtained by UV radiation. The effects of rosin on heat resistance, hydrophobicity, viscoelasticity, adhesion and antibacterial of PSA have been studied. The results show that the heat resistance index, the contact angle and the peel strength of PSA are increased by 4%, 31 % and 88 % respectively when rosin content is 6 wt%. In addition, the storage modulus and loss modulus of PSAs enhance with the increase of frequency, and the storage modulus of PSAs is always higher than the loss modulus. All PSAs have good antibacterial properties, with an antibacterial rate above 99.2 %. This will help expand the application of polyurethane/polysiloxane PSA such as food packaging materials.

尽管聚氨酯压敏胶粘剂（PSA）已被广泛使用，但在粘合性和耐热性方面仍存在一些不足。为了弥补这些缺点，将松香引入聚氨酯/聚硅氧烷共聚物中以改善其耐热性和粘合性，同时还改善了其疏水性。通过一锅聚合法合成乙烯基封端的聚氨酯/聚硅氧烷共聚物，最后通过紫外线辐射获得具有不同松香含量的PSA。研究了松香对PSA耐热性，疏水性，粘弹性，附着力和抗菌性的影响。结果表明，当松香含量为6 wt％时，PSA的耐热指数，接触角和剥离强度分别提高4％，31％和88％。此外，PSA的储能模量和损耗模量随频率的增加而增加，PSA的储能模量始终高于损耗模量。所有PSA都具有良好的抗菌性能，抗菌率超过99.2％。这将有助于扩大聚氨酯/聚硅氧烷PSA（例如食品包装材料）的应用。