Effect of network morphology on adhesive performance in emulsion blends of acrylic pressure sensitive adhesives

被引：33
|
作者：
Tobing, Singa [1 ,2 ]
Klein, Andrew [2 ,3 ]
Sperling, L.H. [2 ,4 ]
Petrasko, Bob [1 ]
机构：
[1] Avery Dennison Corporation, 7670 Auburn Road, Painesville, OH 44077, United States
[2] Department of Chemical Engineering, Lehigh University, Bethlehem, PA 18015, United States
[3] Emulsion Polymers Institute, Lehigh University, Bethlehem, PA 18015, United States
[4] Department of Materials Science and Engineering, Lehigh University, Bethlehem, PA 18015, United States
来源：
| 2001年 / John Wiley and Sons Inc.卷 / 81期
关键词：
Acrylics - Crosslinking - Emulsion polymerization - Gels - Latexes - Molecular weight - Morphology - Polymer blends;
D O I：
10.1002/app.1646
中图分类号：
学科分类号：
摘要：
High-gel containing latices and gel-free latex were blended at various weight ratios. The high-gel containing latices was made of poly(2-ethyl hexylacrylate-stat-acrylic acid) and the gel-free latex was made of poly(2-ethyl hexylacrylate-stat-acrylic acid-stat-isobutoxymethyl acrylamide) using semicontinuous emulsion polymerization. Films were cast at room temperature and dried at 121°C for 10 min. Adhesive performance was evaluated in terms of loop tack, peel, and shear holding power. It was found that interlinking the microgels by the linear polymer due to the isobutoxymethyl acrylamide-acrylic acid reaction in the film when heated gave synergistic effects in increasing shear. This interlinking could take place only if the molecular weight between crosslinks (Mc) of the microgels was greater than the entanglement molecular weight of the linear polymer (Me), and if the weight average molecular weight of the linear polymer (Mw) was greater than 2 × Me. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci.
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