Melt Synthesis and Characterization of Aliphatic Low-Tg Polyesters as Pressure Sensitive Adhesives
Melt Synthesis and Characterization of Aliphatic Low-Tg Polyesters as Pressure Sensitive Adhesives
复制标题
压敏胶用脂肪族低 Tg 聚酯的熔体合成及表征
DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
T. Long
中科院分区：
文献类型：
--
作者：
Gozde I. Ozturk;A. Pasquale;T. Long
聚酯是新一代压敏胶粘剂的理想候选者，由于其低成本和潜在的生物降解性，在无溶剂的情况下很容易合成。在本研究中，采用无溶剂、环境友好的熔融缩聚方法合成了具有低玻璃化转变温度(Tg)的线性、全脂肪族聚酯。用不同的二元醇和双酯单体合成了不同组成的聚酯，以调节玻璃化转变温度，获得最佳的粘接性能。1，4-环己烷二甲酸二甲酯(DMCD)、己二酸二甲酯(DMAP)、二甘醇(DEG)和三甘醇(TEG)同分异构体的熔融缩聚反应生成了一系列线性低玻璃化转变温度聚酯。用尺寸排阻色谱(SEC)、差示扫描量热法(DSC)和核磁共振氢谱对所合成的聚酯进行了表征。用动态力学分析(DMA)表征了低Tg聚酯的频率特性和温度特性。通过在环境湿度和温度下测量粘度、剥离和剪切强度来评估聚合物的粘接性能。低Tg聚酯的剥离和粘接性能可与商用丙烯酸胶粘剂相媲美。
Polyesters, which are readily synthesized in the absence of solvent, are excellent candidates for a new generation of pressure sensitive adhesives (PSAs) due to their low cost and potential biodegradability. In this study, linear, all-aliphatic polyesters with low glass transition temperatures (Tg) were synthesized using a solvent-free, environmentally friendly melt polycondensation methodology. Polyesters of various compositions were synthesized from different diol and diester monomers to adjust the glass transition temperature and achieve optimum adhesive properties. Melt polycondensation of an isomeric mixture of dimethyl-1,4-cyclohexane dicarboxylate (DMCD), dimethyl adipate (DMAP), diethylene glycol (DEG), and triethylene glycol (TEG) generated a series of linear low-Tg polyesters. The synthesized polyesters were characterized using size exclusion chromatography (SEC), differential scanning calorimetry (DSC), and 1H NMR spectroscopy. The frequency- and temperature-dependent properties of the low-Tg polyesters were characterized using dynamic mechanical analysis (DMA). The adhesive performance of the polymers was evaluated using tack, peel, and shear strength measurements at ambient humidity and temperature. The low-Tg polyesters exhibited peel and tack properties comparable with commercial acrylic adhesives.