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Sustainable phenolic thermosets coatings derived from urushiol
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2020-11-21 , DOI: 10.1002/pen.25593
Jianrong Xia 1 , Hanyu Xue 1 , Renjin Gao 1 , Yuchi Zhang 1 , Qi Lin 1
Affiliation  

The over‐exploitation of finite fossil resources and/or the increased environmental and sustainable awareness inspire scientists and technologists to search for inexpensive alternatives from renewable chemicals. Phenol formaldehyde (PF) resins, the oldest type of synthetic polymers with good mechanical properties and heat resistance, are widely used in the production of coatings, laminates, molding compositions, and glues. Here, biobased urushiol‐derived PF resins were synthesized from the alkali‐catalyzed reaction between urushiol and formaldehyde. The chemical compositions and molecular structures of resole resins were characterized by carbon‐13 nuclear magnetic resonance and Fourier transform infrared spectroscopy, and their curing behaviors were studied by differential scanning calorimetry. The as‐prepared urushiol‐derived resole resins had methylol (Ph−CH2OH), ortho‐ and para‐hemiformal groups (Ph−CH2OCH2OH), and the para−para/ortho−para/ortho−ortho links of methylene groups (Ph−CH2−Ph), whereas the resole resins had low curing temperatures at about 100–113°C. Additionally, given the long side alkyl group moiety on the aromatic rings of urushiol, the films of cured urushiol‐derived resole resins had low glass transition temperatures of 132 ± 2°C. Furthermore, the as‐prepared urushiol‐derived coatings exhibited excellent physical and mechanical properties.

中文翻译:

源自漆酚的可持续酚醛热固性涂料

对有限的化石资源的过度开发和/或对环境和可持续意识的增强,激发了科学家和技术人员从可再生化学品中寻找廉价替代品的机会。苯酚甲醛(PF)树脂是最古老的具有良好机械性能和耐热性的合成聚合物,广泛用于涂料,层压板,模塑组合物和胶水的生产中。在这里,生物基漆酚醇类PF树脂是由漆酚醇和甲醛之间的碱催化反应合成的。通过碳13核磁共振和傅立叶变换红外光谱对可熔酚醛树脂的化学组成和分子结构进行表征,并通过差示扫描量热法研究了其固化行为。2 OH),邻半和副半形基团(Ph-CH 2 OCH 2 OH)以及亚甲基的对-对/对-邻/对-对/邻-邻键(Ph-CH 2 -Ph)树脂的固化温度较低,约为100–113°C。此外,考虑到漆酚的芳环上的长侧烷基部分,固化的漆酚衍生的甲阶酚醛树脂的膜的玻璃化转变温度低,为132±2°C。此外,所制备的漆酚来源的涂料还具有优异的物理和机械性能。
更新日期:2020-11-21
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