POSS-containing Pressure Sensitive Adhesive Films Exhibiting Enhanced Mechanical and Adhesive Properties
Vol. 56, No. 6, pp. 379-385,
Dec. 2019
10.12772/TSE.2019.56.379
PDF
Abstract
Acrylic-based pressure sensitive adhesive (PSA) has been widely used in diverse
industrial applications such as attaching various materials and vehicle painting. Its extensive
use is mainly attributed to its excellent transparency, adhesive strength, and chemical
resistance characteristics. However, it has been widely accepted that PSA’s thermal and
mechanical stabilities are not sufficient since it is primarily dependent on the physical interactions
of linear molecular structures. In this study, to improve the adhesive’s mechanical
strength while retaining the adhesion properties of the photocurable acrylic adhesives,
polyhedral oligomeric silsesquioxanes (POSS) derivatives were employed as filler materials
and their impact on mechanical and adhesive properties was evaluated. Four types of
functional groups, methacryl, isooctyl, glycidyl, and acryloisobutyl substituents, were
attached to the 8-armed POSSs analyzed in this study. It was observed that the addition of
methacryl POSS to the adhesive material induced a significant increase in mechanical
strength. The overall physical properties were measured by first controlling the amount of
methacryl POSS to keep the POSS wt% of the adhesive compositions between 0.1 to 1 and
then assessing the corresponding changes of the acrylic adhesives in terms of tensile
strength, strain, peel strength, and surface characteristics. Curing time adjustment and UV/
ozone treatments were additionally applied to determine the optimized composition for
an acrylic adhesion film.
Keywords: pressure sensitiv
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