Varganici Cristian-Dragos, Rosu Liliana, Rosu Dan, Rosca Irina, Ignat Maurusa-Elena, Ignat Leonard
Centre of Advanced Research in Bionanoconjugates and Biopolymers, "Petru Poni" Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania.
Polymers (Basel). 2023 Dec 25;16(1):67. doi: 10.3390/polym16010067.
In this study, the effects of three diamine curing agents (aromatic, cycloaliphatic, aliphatic) on the photochemical behavior of bisphenol A diglycidyl ether networks were comparatively examined. In order to monitor structural changes and study the curing agents' action mode, the cured epoxy resins were characterized before and after photoirradiation by means of Fourier-transform infrared spectroscopy, contact angle, differential scanning calorimetry, scanning electron microscopy, and energy-dispersive X-ray analysis, mass loss, and color modification measurements. Water absorption tests were also conducted. The cured epoxy resins are to be used in different multicomponent polymer materials for outdoor protection. The presence of the cycloaliphatic hardener led to reduced water absorption, and after UV irradiation, an increase in the glass transition temperature and lowest mass loss of the corresponding cured epoxy resin compared to the ones cured with aromatic and aliphatic hardener.
在本研究中，比较考察了三种二胺固化剂（芳香族、脂环族、脂肪族）对双酚A二缩水甘油醚网络光化学行为的影响。为了监测结构变化并研究固化剂的作用模式，通过傅里叶变换红外光谱、接触角、差示扫描量热法、扫描电子显微镜、能量色散X射线分析、质量损失和颜色变化测量等手段，对光辐照前后的固化环氧树脂进行了表征。还进行了吸水性测试。固化环氧树脂将用于不同的多组分聚合物材料的户外防护。与用芳香族和脂肪族固化剂固化的环氧树脂相比，脂环族固化剂的存在导致吸水性降低，并且在紫外线辐照后，相应固化环氧树脂的玻璃化转变温度升高且质量损失最低。
