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首页> 外文期刊>Polymers >Production and Characterization of Non-Isocyanate Polyurethane/SiO 2 Films Through a Sol-Gel Process for Thermal Insulation Applications
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Production and Characterization of Non-Isocyanate Polyurethane/SiO 2 Films Through a Sol-Gel Process for Thermal Insulation Applications

机译：用于隔热应用的非异氰酸酯聚氨酯/ SiO 2薄膜的溶胶-凝胶法制备和表征

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摘要

The reaction of cyclic carbonates with amines is the most attractive among the synthesis methods for isocyanate-free polyurethane. Non-isocyanate polyurethane films with SiO 2 NPs fabricated by a sol-gel process are reported, where cyclic carbonates (CC) were produced under mild conditions by CO 2 insertion in an epoxide complex in the presence of LiCl. A reaction of CC and polyamines was carried out in a low concentration polymer matrix of PVA. The materials were characterized by 1 H-NMR, FTIR, UV-Vis, SEM, TGA, DTG, and a KD 2 pro technique. polymer FTIR results are consistent with the literature, even with the use of a non-conventional methodology, where the found chemical interactions values were 3330, 2930 and 1637 cm ?1 . There are differences in the polymers’ morphologies due to the presence and absence of SiO 2 NPs according to SEM, where the spherical morphology and homogenous particle size distribution of NPs around 100 nm. According to TGA results, all polymers showed their last stage decomposition after 300 °C and polymers with higher concentration of NPs showed even better stability. Due to the obtained results, the polymers have the potential to be used for thermal insulation without negative effect on the environment.
机译：在无异氰酸酯聚氨酯的合成方法中，环状碳酸酯与胺的反应是最有吸引力的。报道了通过溶胶-凝胶法制备的具有SiO 2 NP的非异氰酸酯聚氨酯膜，其中在温和条件下，通过在LiCl存在下将CO 2插入环氧化物络合物中，生产环状碳酸酯（CC）。 CC和多胺的反应在PVA的低浓度聚合物基质中进行。通过1 H-NMR，FTIR，UV-Vis，SEM，TGA，DTG和KD 2 pro技术对材料进行表征。聚合物FTIR结果与文献一致，即使使用非常规方法也是如此，在该方法中发现的化学相互作用值为3330、2930和1637 cm？1。根据SEM，由于存在和不存在SiO 2 NP，聚合物的形态存在差异，其中NP的球形形态和均一的粒径分布在100 nm附近。根据TGA结果，所有聚合物在300℃后都显示出其最后阶段的分解，并且具有较高NP浓度的聚合物显示出甚至更好的稳定性。由于获得的结果，该聚合物具有用于绝热的潜力，而对环境没有负面影响。

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