转移涂布用水性丙烯酸系压敏黏合剂的交联与性能

以丙烯酸正丁酯、丙烯酸-2-乙基己酯为单体,壬基酚聚氧乙烯醚硫酸铵为乳化剂,巯基乙醇为链转移剂,(N-丁氧基甲基)丙烯酰胺/丙烯酸(NBMA/AA)为交联体系,采用全乳化半连续乳液聚合法制备了适用于转移涂布用丙烯酸系压敏黏合剂,所得黏合剂相对交联速度慢,制品剥离时几乎无残胶。系统研究了NBMA/AA交联体系用量对乳液及压敏黏合剂制品性能的影响,当NBMA用量为1.5%,AA用量为3.0%时,乳液聚合稳定性最好,压敏黏合剂的初黏力可维持在14^#球以上,持黏力超过48h,180°剥离强度为2.72N/25mm。

On-Line Pyrolysis-Liquid Chromatography of （Meth-） Acrylic Acid in Waterborne Polymers Using Cryogenic Injection

Pyrolysis gas chromatography is not a comprehensive analysis method for the determination of acrylics. Polar acrylic monomers show low abundance by gas chromatography. Because of this, a home-made pyrolysis liquid chromatographic injector by means of cryogenic-focussing is developed to determine the presence and concentration of hydroxyl and carboxyl functional monomers present in water- and solvent-borne acrylics. We have shown the prove-of-principle of using cryogenic-focussing for UPLC （pyrolysis-ultra-performance liquid chromatography） injection.