| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 227391 | Journal of Industrial and Engineering Chemistry | 2014 | 6 Pages |
•Acrylic PSAs were modified to carry the vinyl groups in side chain for UV curing.•The naphthyl curing agent was synthesized using naphthol of thermally stable structure as a raw material.•UV-cured PSAs with naphthyl curing agent were prepared for thermally stable bonding.•Acrylic PSA crosslinked with naphthyl curing agent allowed the optimal handling of thin silicon wafers.
Pressure sensitive adhesives (PSAs) with higher thermal stability were synthesized by crosslinking acrylic copolymer with naphthyl curing agent. The acrylic copolymer was synthesized for a base resin of PSAs by solution polymerization of 2-ethylhexyl acrylate, ethyl acrylate, and acrylic acid with N,N′-azobisisobutyronitrile as an initiator. The acrylic copolymer was further modified with glycidyl methacrylate to have the vinyl groups available for UV curing. Thermal stability of acrylic PSAs was improved noticeably with increasing naphthyl curing agent content and UV dose mainly due to the extensive formation of crosslinked structure in the polymer matrix. Although the peel strength decreased with UV curing of acrylic polymer, a proper balance between the thermal stability and the adhesion performance of PSAs was obtained by controlling the UV curing with naphthyl curing agent content and UV dose.
Graphical abstractThe naphthyl curing agent was synthesized using naphthol of thermally stable structure as a raw material. UV-cured PSAs with naphthyl curing agent showed the thermal stability suitable for handling of thin silicon wafers.Figure optionsDownload full-size imageDownload as PowerPoint slide
