针对分子量不同的溶剂型丙烯酸酯共聚物压敏胶的流变性能进行研究,通过频率扫描、振幅扫描两种不同模式进行流变性能测试,并对其蠕变性能进行了测试,通过测试,分析了分子量对流变性能的影响.结果表明,分子量增大,区分频率值(f*)变小,零剪切黏度(ηo)变大,样品的弹性变好；在振幅扫描模式下,随着分子量变大,样品的线性黏弹区域变大,弹性模量(G′)与黏性模量(G″)均变大,但弹性模量增大的幅度大于黏性模量,因此,随着分子量变大,样品逐渐从G′＜G″变为G′=G″最终G′＞G″,样品由黏弹性液体流变行为逐渐向黏弹性固体流变行为转变；蠕变测试说明分子量增大,有利于改善样品的抗剪切变形能力与蠕变回复能力,蠕变回复时间也随之变大.
参考文献
| [1] | 郑永军.高强度丙烯酸酯双面压敏胶带的研制[J].粘接,1999(06):15-17. |
| [2] | 杨玉昆;吕凤亭.压敏胶产品与技术手册[M].北京:化学工业出版社,2006:230-233. |
| [3] | 唐敏锋;范晓东;唐中华 .交联型聚丙烯酸酯压敏胶乳液的合成及其粘接性能的研究[J].中国胶黏剂,2005,9(14):1-6. |
| [4] | SCHMITZ P J;HOLUBKA J W .Investigation of the surface and interphase composition of adhesion promoter/themoplastic olefin systems:The effect of adhesion promoter bake temperature[J].Journal of Adhesion,1995,48(03):137-148. |
| [5] | DAHLQUIST C A.An investigation into the nature of tack[J].Adhesives Age,1959(02):25-29. |
| [6] | CHU S G.Viscoelastic Properties of Pressure Sensitive Adhesives[M].New York:Van Nostrand Reinhold Company Inc,1989:158-203. |
| [7] | Ho KY;Dodou K .Rheological studies on pressure-sensitive silicone adhesives and drug-in-adhesive layers as a means to characterise adhesive performance.[J].International Journal of Pharmaceutics,2007(1/2):24-33. |
| [8] | DEMARTEAU W;LOUTZ J M .Rheology of acrylic dispersions for pressure sensitive adhesives[J].Progress in Organic Coat ings,1996,27(1-4):33-44. |
| [9] | ADRIENNE E O;NORBERT W .The effect of molecular weight and temperature on tack properties of model polyisobutylenes[J].International Journal of Adhesion and Adhesives,2004,24(04):335-346. |
| [10] | Amelie Baron;Juan Rodriguez-Hernandez;Emmanuel Ibarboure .Adhesives based on polyurethane graft multiblock copolymers:Tack,rheology and first morphological analyses[J].International Journal of Adhesion & Adhesives,2009(1):1-8. |
| [11] | 周明,宋义虎,孙晋,何力,谭红,郑强.硅烷偶联剂对SSBR/SiO2混炼胶体系动态流变行为的影响[J].高分子学报,2007(02):153-157. |
| [12] | Marcelo do Amaral;Alexandra Roos;Jose M.Asua;Costantino Creton .Assessing the effect of latex particle size and distribution on the rheological and adhesive properties of model waterborne acrylic pressure-sensitive adhesives films[J].Journal of Colloid and Interface Science,2005(2):325-338. |
| [13] | SCHRAMM G;李晓晖.实用流变测量学[M].北京:石油工业出版社,1998:90-98. |
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