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摘要
采用阴离子聚合的方法合成了聚苯乙烯-异戊二烯-苯乙烯树脂(SIS),并按一定配方制备出热熔压敏胶。研究了SIS的相对分子质量和分子结构对热熔压敏胶性能的影响,并结合嵌段聚合物的聚集态结构对实验结果进行了分析。研究发现,随着SIS中苯乙烯含量的增加,热熔压敏胶初粘力和熔融黏度降低,软化点升高,持粘力和剥离强度先升高后降低。随着SIS相对分子质量的增加,所制得热熔压敏胶熔融黏度和持粘力升高,剥离强度在一定范围波动,初粘力呈现先升高后降低的趋势。可见,嵌段共聚物SIS的结构对热熔压敏胶的粘附性能影响显著。
Abstract
SIS (styrene-isoprene-styrene block copolymer) was synthesized via an anionic-polymerization strategy and used in hot-melt pressure-sensitive adhesive.The effect of structure and molecular weight of SIS on the properties of the adhesive were studied systematically.The results showed that the initial viscosity and melting viscosity of the adhesive reduced with the increase of the styrene content in SIS resin.At same time,the softening point increased,while the adhesion and peel strength exhibited a maximum with the increase of styrene content.Additionally,the melt viscosity and adhesion strength of the adhesive increased with the increase of SIS molecular weight,while the peel strength fluctuated within a certain range.These results indicated that the structure of the SIS block copolymer had a significant influence on the adhesive performance of the adhesive.
关键词
SIS
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结构
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热熔压敏胶
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性能
Key words
styrene-isoprene-styrene block copolymer
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structure
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hot-melt pressure sensitive adhesive
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property
SIS基热熔压敏胶结构与性能关系[J].
化工新型材料, 2020, 48(4): 121-124 DOI:
[1] 王承潇,汤秀珍,沈平孃,等.热熔压敏胶应用于中药贴剂的研究进展[J].中草药,2010,41(3):496-499.
[2] Galán C,Sierra C A,Fatou J M G,et al.A hot-melt pressure-sensitive adhesive based on styrene-butadiene-styrene rubber.the effect of adhesive composition on the properties[J].Journal of Applied Polymer Science,2015,62(8):1263-1275.
[3] Powell T,Pacholski M,Griffith B,et al.Correlating substrate properties with pressure sensitive adhesive performance[J].Microscopy and Microanalysis,2016,22(S3):388-389.
[4] 王德充,梁爱民,韩丙勇.锂系合成橡胶及热塑性弹性体[M].北京:中国石化出版社,2008:182-187.
[5] Sotoodeh-Nia Z,Hohmann A,Buss A,et al.Rheological and physical characterization of pressure sensitive adhesives from bio-derived block copolymers[J].Journal of Applied Polymer Science,2018,135(34):46618.
[6] O'Connor A E,Willenbacher N.The effect of molecular weight and temperature on tack properties of model polyisobutylenes[J].International Journal of Adhesion & Adhesives,2004,24(4):335-346.
[7] Morèseséguéla B,Stjacques M,Renaud J M,et al.Microphase separation in low molecular weight styrene-isoprene diblock copolymers studied by DSC and 13C-NMR[J].Macromolecules,1980,13(1):100-106.
[8] Poh B T,Kwo H K.Shear strength of SMR—based pressure-sensitive adhesives[J].Polymer-Plastics Technology and Engineering,2007,46(10):1021-1024.
基金资助
国家自然科学基金面上资助(21773310)
