Sustainable isosorbide-based transparent pressure-sensitive adhesives for optically clear adhesive and their adhesion performance

Abstract

A biomass-based isosorbide acrylate (ISA) was synthesized in a one-pot reaction at low temperature with a quite slow dropwise technique using a syringe pump. Using the ISA monomer, UV-cured transparent acrylic pressure-sensitive adhesives (PSAs) composed of semi-interpenetrating networks were prepared. The effect of ISA on the adhesion performance of the resulting acrylic PSAs was investigated by changing the ISA content, while fixing the mole ratio between 2-ethylhexyl acrylate and 2-hydroxyethyl acrylate in the PSAs. The prepared acrylic PSAs, with ISA content ranging from 3.2 to 14.3 mol%, were evaluated in terms of 180 ∘ peel strength, probe tack, static shear testing and optical properties. Increasing the ISA content in the acrylic PSAs improved the adhesion properties, such as 180 ∘ peel strength (0.25-0.32 N/25 mm), shear holding power (0.086-0.023 mm) and probe tack (1.21-2.26 N). Dynamic mechanical analysis indicated that ISA is a good candidate monomer, playing the role of adhesion promoter and hard monomer in the acrylic PSAs.

Free-Radical Bulk-Photopolymerization Process as a Method of Obtaining Thermally Curable Structural Self-Adhesive Tapes and Effect of Used Type I Photoinitiators

“…Relatively rarely the photopolymerization method is used to obtain a liquid polymer or polymer solutions. Admittedly, in the last decade several publications have been published ‘regarding the method of obtaining acrylate syrups via the photoinduced polymerization process that occurs in large amounts of monomers’ mixture and with a mechanical mixing [ 26 , 27 , 28 , 29 , 30 , 31 , 32 ]. Obtained products were mainly used as transparent pressure-sensitive adhesives.…”

Incorporation of flame retardancy in bio‐resourced mannitol based curing agent for clear pressure‐sensitive adhesive

“…This acidic group decreases with an increase in the % of PMM in CPSAs, the hydroxyl group from the PMM will react with -COOH of acrylic acid and form the ester bond. [45][46][47] In respect to this, the peak at 3018 cm The inertness of the hydroxyl group during modification was confirmed with the existence of a peak at 56 ppm.…”

“…The peak around 1706 cm −1 is the typical peak of C=O associated with ‐COOH functionality of acrylic acid. This acidic group decreases with an increase in the % of PMM in CPSAs, the hydroxyl group from the PMM will react with ‐COOH of acrylic acid and form the ester bond 45‐47 . In respect to this, the peak at 3018 cm −1 associated with the hydroxyl group increases with an increase in the dose of PMM.…”

Carbohydrate-derived unsaturated polyester for high bio-based carbon content photopolymer

“…Indeed, the isohexide is composed of 2 tetrahydrofuran rings fused together with an angle of 120° which lead to a V-shaped molecule. However, the endo and exo hydroxyl groups won't have the same reactivity in esterification depending of the steric requirements and intramolecular hydrogen bonding [10], which can make more difficult the functionalization [11].…”