Barandiaran Irati, Gomez-Hermoso-de-Mendoza Joseba, Gutierrez Junkal, Tercjak Agnieszka, Kortaberria Galder
Group 'Materials + Technologies' (GMT), Chemical and Environmental Engineering Department, Faculty of Engineering of Gipuzkoa, University of the Basque Country (UPV/EHU), Plaza Europa 1, 20018 Donostia-San Sebastian, Spain.
Chemical and Environmental Engineering Department, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad, 7, 01006 Vitoria-Gasteiz, Spain.
Polymers (Basel). 2023 Feb 28;15(5):1216. doi: 10.3390/polym15051216.
A biobased diglycidyl ether of vanillin (DGEVA) epoxy resin was nanostructured by poly(ethylene oxide-b-propylene oxide-b-ethylene oxide) (PEO-PPO-PEO) triblock copolymer. Due to the miscibility/immiscibility properties of the triblock copolymer in DGEVA resin, different morphologies were obtained depending on the triblock copolymer amount. A hexagonally packed cylinder morphology was kept until reaching 30 wt% of PEO-PPO-PEO content, while a more complex three-phase morphology was obtained for 50 wt%, in which large worm-like PPO domains appear surrounded by two different phases, one of them rich in PEO and another phase rich in cured DGEVA. UV-vis measurements show that the transmittance is reduced with the increase in triblock copolymer content, especially at 50 wt%, probably due to the presence of PEO crystals detected by calorimetry.
一种基于生物的香草醛二缩水甘油醚（DGEVA）环氧树脂通过聚（环氧乙烷-b-环氧丙烷-b-环氧乙烷）（PEO-PPO-PEO）三嵌段共聚物进行纳米结构化。由于三嵌段共聚物在DGEVA树脂中的混溶/不混溶特性，根据三嵌段共聚物的用量可获得不同的形态。在PEO-PPO-PEO含量达到30 wt%之前，保持六方堆积圆柱形态，而对于50 wt%的含量，则获得更复杂的三相形态，其中出现大的蠕虫状PPO域，被两个不同的相包围，其中一个相富含PEO，另一个相富含固化的DGEVA。紫外可见光谱测量表明，随着三嵌段共聚物含量的增加，透光率降低，特别是在50 wt%时，这可能是由于量热法检测到的PEO晶体的存在。
