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Biosourced vanillin Schiff base platform monomers as substitutes for DGEBA in thermoset epoxy
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2020-09-16 , DOI: 10.1002/pen.25497
Eric Desnoes 1 , Lotfi Toubal 1 , Amel Hadj Bouazza 1 , Daniel Montplaisir 1
Affiliation  

Diglycidyl ether Schiff base monomers were prepared from vanillin and various diamines. FT‐IR, 1H NMR, 13C NMR, and mass spectroscopy were used to determine their structure. Cured thermoset epoxies made with them were compared to commercial epoxy in terms of mechanical properties. Tensile strengths ranged from 35.1 to 60.4 MPa, Young's modulus from 3.9 to 6.9 GPa, similar to the commercial product. The glass transition ranged from 80 to 117°C, the phase transition Tα from 80 to 121°C and the storage modulus from 2 to 3.5 GPa. Thermogravimetric analysis showed that the vanillin‐based epoxies were less heat resistant but had higher residual mass (20‐30% wt/wt). Hydrolysis, hydrophobicity and degradation were also monitored to evaluate their potential for coating applications.

中文翻译:

生物来源的香兰素席夫碱平台单体可替代热固性环氧树脂中的DGEBA

由香草醛和各种二胺制备二缩水甘油基醚席夫碱单体。FT-IR,1 H NMR,13 C NMR和质谱用于确定其结构。用它们制成的固化的热固性环氧树脂在机械性能方面与商用环氧树脂进行了比较。类似于商业产品,拉伸强度为35.1至60.4 MPa,杨氏模量为3.9至6.9 GPa。玻璃化转变范围为80〜117℃,相变Ť α80至121°C的储能模量为2至3.5 GPa。热重分析表明,基于香草醛的环氧树脂耐热性较低,但残留质量较高(20-30%wt / wt)。还监测水解,疏水性和降解,以评估其在涂料应用中的潜力。
更新日期:2020-10-17
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