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We have developed a next-generation, temporary fixing agent that can be easily peeled off in film form after hot water immersion without using organic solvents. Peel-off property after hot water immersion was achieved by controlling the Tg of the cured agent, which induced to accumulate internal stress in curing and to relax the stress in hot water immersion. Such fixing agents are becoming the de facto standard for use in the processing of capacitive touch sensors on cover glasses, for example, on smartphones and tablet PCs.
The cloud point was determined in aqueous poly(N,N-diethylacrylamide) (PDEA) solutions. It was found that the cloud-point curve of each PDEA sample has a critical point and each PDEA solution exhibits phase separation into two liquid phases when the temperature is increased above its cloud point, which has not been previously observed for aqueous poly(N-isopropylacrylamide) (PNIPA) solutions. Therefore, the aqueous PDEA solutions exhibit typical phase behavior of lower critical solution temperature type, which is substantially different from that observed for PNIPA.
The interfacial dynamics of the segment of poly(methyl methacrylate) (PMMA) terminated with elemental blocks containing polyhedral oligomeric silsesquioxane (POSS), namely PPMP (PMAPOSS-b-PMMA-b-PMAPOSS), was much slower than that of the conventional PMMA. The number of platelets adhered to the PPMP film was dependent on the pre-immersion time in phosphate-buffered saline before the platelet seeding, and these results could be explained in terms of the aggregation states of water at the interface.
