Preparation and Characterization of a Renewable Pressure-Sensitive Adhesive System Derived from 蔚-Decalactone, l-Lactide, Epoxidized Soybean Oil, and Rosin Ester

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• 作者：Sangjun Lee ; Kyungchan Lee ; Young-Wun Kim ; Jihoon Shin
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2015
• 出版时间：September 8, 2015
• 年：2015
• 卷：3
• 期：9
• 页码：2309-2320
• 全文大小：717K
• ISSN：2168-0485

文摘

Pressure-sensitive adhesives (PSAs) are prepared with plant-based thermoplastic polyester elastomers (TPPEs), rosin ester tackifier, and epoxidized soybean oil plasticizer. Controlled bulk ring-opening transesterification polymerization of 蔚-decalactone and l-lactide using diethylene glycol as an initiator gives ABA type block polyesters via a one-pot, two-step process with only tin(II) ethylhexanoate. Three semicrystalline poly(l-lactide)鈥損oly(蔚-decalactone)鈥損oly(l-lactide) (PLLA鈥揚DL鈥揚LLA) triblock copolymers are prepared containing 100 kg mol^鈥? PDL midblocks and 8鈥?0 wt % PLLA end blocks with narrow dispersities. The mechanical behavior of the triblock architectures is investigated by tensile experiments. The triblocks are combined with the tackifier of 50 wt % and the plasticizer of 15鈥?0 wt %. The thermal, viscoelastic, and morphological properties of the elastomers and the adhesive formulations are determined with differential scanning calorimetry, thermal gravimetric analysis, dynamic mechanical analysis, and atomic force microscopy. The renewable self-adhesive performance is evaluated showing peel strength of 1.9鈥?.6 N cm^鈥?, probe tack of 2.2鈥?.0 N, and static shear strength of >20鈥?00 min comparable to current thermoplastic elastomers and PSAs. These novel materials could hold promise for sustainability and high adhesive performance.