Solutions of amorphous poly(d,l‐lactide‐co‐trimethylene carbonate)s (PDLTMCs) in ethyl acetate work as solvent‐based physical adhesives through diffusion mechanisms for a variety of aliphatic polyester‐based adherents. The random PDLTMCs with a trimethylene carbonate content of 11, 16, and 20 mol% are synthesized in bulk, achieving high molecular weight, M_n, up to 128 kg mol⁻¹ and dispersity around 1.7. The PDLTMCs are amorphous and have a glass transition temperature in the range 34.7 to 43.6 °C and in agreement with the theoretical values calculated using the Fox equation. The mechanical and surface properties of the PDLTMCs are tested preparing solvent cast films, which are soft and tough and, although they have a higher contact angle than the parent homopolymer, they show higher water uptake capacity. The potential application as adhesives of the synthesized PDLTMCs is evaluated by preparing a 20 wt% solution in ethyl acetate and testing them by adhering films with different compositions as well as constructs having different geometries and surface roughness. The results demonstrate that the adhesion strength is higher on adherent films having similar chemical compositions as the adhesives and on surfaces having similar compositions to each other but different roughness. The similar chemical nature of the adhesive and adherent probably favors the diffusion mechanism through which adhesion takes place.

中文翻译：

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基于聚（d，l-丙交酯-三亚甲基碳酸酯）的多用途可降解物理胶粘剂

无定形聚（解d，升-lactide-共同在通过扩散机制乙酸乙酯工作作为溶剂系粘合剂物理三亚甲基碳酸酯）（PDLTMCs）用于各种脂肪族聚酯系的追随者。批量合成了碳酸亚丙酯含量为11、16和20 mol％的无规PDLTMC，实现了高达128 kg mol ^-1的高分子量M _n分散度约为1.7。PDLTMC为非晶态，玻璃化转变温度为34.7至43.6°C，与使用Fox方程计算的理论值一致。对PDLTMC的机械和表面性能进行了测试，制备了溶剂型流延膜，该膜柔软且坚韧，尽管它们的接触角比母体均聚物高，但它们显示出更高的吸水能力。通过制备20 wt％的乙酸乙酯溶液并通过粘合具有不同组成的薄膜以及具有不同几何形状和表面粗糙度的膜来测试合成的PDLTMCs作为粘合剂的潜在应用。结果表明，在具有与粘合剂相似的化学组成的粘合膜上以及在具有彼此相似但粗糙度不同的表面上的粘合强度更高。粘合剂和被粘物的相似化学性质可能有利于发生粘着的扩散机理。