Abstract Random poly(ester amide)s are synthesized from succinic acid, ethylene glycol or 1,4-butanediol and different aliphatic amido diols – symmetric α,ω-diols containing two amide moieties. The formation of chain-terminating N-succinimide end groups, which limit the molecular weight attainable by common synthetic strategies, is effectively suppressed. Poly(ester amide)s crystallize in a suprastructure similar to that of even-even polyamides. The thermal properties of both types of poly(ester amide)s synthesized are considerably improved and transition temperatures are tunable by changing the ratio of aliphatic diol to rapidly crystallizing amido diol in the feed. Using ethylene glycol as diol component, Tg and Tm of the material could be enhanced from −12 to −2 °C and 97 to 157 °C, respectively, while an increase from −33 to −8 °C and 115–153 °C was observed for their 1,4-butanediol derived counterparts. Furthermore, the slow crystallization rate of poly(ethylene succinate) from molten state could be significantly accelerated by the introduction of amide moieties into the polymer backbone.

中文翻译：

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来自聚（琥珀酸亚烷基酯）和快速结晶酰氨基二醇的聚（酯酰胺）：合成、热性能和结晶行为

摘要 无规聚（酯酰胺）由琥珀酸、乙二醇或 1,4-丁二醇和不同的脂肪族酰胺二醇合成——对称的 α,ω-二醇包含两个酰胺部分。有效抑制链终止 N-琥珀酰亚胺端基的形成，这限制了常见合成策略可达到的分子量。聚（酯酰胺）在类似于偶数聚酰胺的超结构中结晶。通过改变进料中脂肪族二醇与快速结晶的酰氨基二醇的比率，合成的两种聚（酯酰胺）的热性能得到显着改善，并且转变温度可调节。使用乙二醇作为二醇组分，材料的 Tg 和 Tm 可以分别从 -12 到 -2 °C 和 97 到 157 °C 提高，而观察到它们的 1,4-丁二醇衍生对应物从 -33 到 -8°C 和 115-153°C 增加。此外，通过将酰胺部分引入聚合物主链，可以显着加快聚（琥珀酸乙二醇酯）从熔融状态的缓慢结晶速率。