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Effect of the n-butyl acrylate/2-ethylhexyl acrylate weight ratio on the performances of waterborne core-shell PSAs

Author(s)
Park, Sun HeeLee, Tae HeePark, Young IlNoh, Seung ManKim, Jin Chul
Issued Date
2017-09
DOI
10.1016/j.jiec.2017.04.010
URI
https://scholarworks.unist.ac.kr/handle/201301/22370
Fulltext
http://www.sciencedirect.com/science/article/pii/S1226086X17301983
Citation
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, v.53, pp.111 - 118
Abstract
A series of core-shell pressure-sensitive adhesives (PSAs) containing a poly(n-butyl-co-2-ethylhexyl acrylate) shell copolymer were synthesized via a multi-step emulsion process. The weight ratio of n-butyl acrylate (BA) to 2-ethylhexyl acrylate (2-EHA) was manipulated to vary the PSA properties. Measuring performance parameters of the resulting PSAs showed that increasing the relative amount of BA led to a decrease in the tack strength but an increase in the peel strength. In addition, the resistance of the PSAs to heat and humidity increased with increasing BA concentration. This result was correlated with the rheological and thermal properties of the PSA polymer. Finally, the dispersion stability levels of the PSAs were investigated by taking dynamic light scattering (DLS) measurements and applying the Turbiscan technique. Increasing the BA concentration in the PSA was found to lead to the formation of smaller particles and to faster fusion of the dispersed particles.
Publisher
ELSEVIER SCIENCE INC
ISSN
1226-086X
Keyword (Author)
Core-shell emulsionDispersion stabilityPressure sensitive adhesives (PSA)Viscoelastic propertiesWaterborne PSA
Keyword
PRESSURE-SENSITIVE ADHESIVESATOMIC-FORCE MICROSCOPYCROSS-LINKINGPOLYMERIZATIONEMULSIONSUSPENSIONSYSTEMS

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