To develop a novel organic catalyst that can effectively cure cyanate ester resins, the effects of incorporating various phenolic compounds on the curing of bisphenol A dicyanate (BADCY) was investigated. Differential scanning calorimetry (DSC) and Fourier transform infrared (FT-IR) spectroscopy analyses revealed that o -(dimethylamino)methylphenol ( o- DAMP) was a highly effective catalyst for accelerating the curing of BADCY, and the addition of o- DAMP reduced the final curing temperature of BADCY to 180 °C. The promoting effect of o- DAMP was found to be due to the presence of an acidic phenolic OH group and a basic (dimethylamino)methyl group at the ortho-positions of the molecule. The addition of o- DAMP improved the modulus, strength and fracture toughness ( K IC ) of the cured BADCY resins. The mechanical and thermal properties of the cured resins could be adjusted by changing the amount of o- DAMP. The investigation of the effects of incorporating various phenolic compounds on the curing of bisphenol A dicyanate (BADCY) revealed that o -(dimethylamino)methylphenol ( o -DAMP) was a very effective catalyst, which reduced the final curing temperature to 180 °C. The promoting effect of o- DAMP was due to the presence of a phenolic OH and a (dimethylamino)methyl groups at the ortho-positions of the molecule. The addition of o- DAMP improved the mechanical properties of the cured BADCY resins, and the most balanced properties were obtained when the ratio of OH to OCN was 0.05.

中文翻译：

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邻位具有叔氨基的酚类化合物促进氰酸酯树脂的固化

为了开发一种能够有效固化氰酸酯树脂的新型有机催化剂，研究了加入各种酚类化合物对双酚 A 二氰酸酯 (BADCY) 固化的影响。差示扫描量热法 (DSC) 和傅里叶变换红外 (FT-IR) 光谱分析表明，o-(二甲氨基)甲基苯酚 (o-DAMP) 是加速 BADCY 固化的高效催化剂，o-DAMP 的加入降低了BADCY的最终固化温度为180°C。发现 o-DAMP 的促进作用是由于在分子的邻位存在酸性酚类 OH 基团和碱性（二甲氨基）甲基基团。o-DAMP 的加入提高了固化 BADCY 树脂的模量、强度和断裂韧性 (K IC )。可以通过改变 o-DAMP 的量来调整固化树脂的机械和热性能。对掺入各种酚类化合物对双酚 A 二氰酸酯 (BADCY) 固化影响的研究表明，o -(二甲氨基)甲基苯酚 (o -DAMP) 是一种非常有效的催化剂，可将最终固化温度降低至 180 °C。o-DAMP 的促进作用是由于在分子的邻位存在酚类 OH 和（二甲氨基）甲基。o-DAMP的加入改善了固化后的BADCY树脂的力学性能，当OH与OCN的比例为0.05时，性能最为平衡。对掺入各种酚类化合物对双酚 A 二氰酸酯 (BADCY) 固化影响的研究表明，o -(二甲氨基)甲基苯酚 (o -DAMP) 是一种非常有效的催化剂，可将最终固化温度降低至 180 °C。o-DAMP 的促进作用是由于在分子的邻位存在酚类 OH 和（二甲氨基）甲基。o-DAMP的加入改善了固化后的BADCY树脂的力学性能，当OH与OCN的比例为0.05时，性能最为平衡。对掺入各种酚类化合物对双酚 A 二氰酸酯 (BADCY) 固化影响的研究表明，o -(二甲氨基)甲基苯酚 (o -DAMP) 是一种非常有效的催化剂，可将最终固化温度降低至 180 °C。o-DAMP 的促进作用是由于在分子的邻位存在酚类 OH 和（二甲氨基）甲基。o-DAMP的加入改善了固化后的BADCY树脂的力学性能，当OH与OCN的比例为0.05时，性能最为平衡。o-DAMP 的促进作用是由于在分子的邻位存在酚类 OH 和（二甲氨基）甲基。o-DAMP的加入改善了固化后的BADCY树脂的力学性能，当OH与OCN的比例为0.05时，性能最为平衡。o-DAMP 的促进作用是由于在分子的邻位存在酚类 OH 和（二甲氨基）甲基。o-DAMP的加入改善了固化后的BADCY树脂的力学性能，当OH与OCN的比例为0.05时，性能最为平衡。