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首页> 外文期刊>Journal of Applied Polymer Science >STUDIES ON THE FORMATION OF NOVEL COPOLYESTERS CONTAINING NAPHTHALENE AND ARALKYLOXY STRUCTURES
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STUDIES ON THE FORMATION OF NOVEL COPOLYESTERS CONTAINING NAPHTHALENE AND ARALKYLOXY STRUCTURES

机译：含萘和芳氧基结构的新型共聚酯的形成研究

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Copolyesters containing naphthalene structure were synthesized from bis(hydroxyethyl)naphthalate (BHEN) and various aralkyloxy diols. The starting bis(4-(2-hydroxyethoxy)aryl) compounds were derived from a nucleophilic substitution of various bisphenols with ethylene carbonate in the presence of potassium iodide (KI). Copolyesters having intrinsic viscosities of 0.50 to 0.60 dL/g were obtained by melt polycondensation in the presence of metallic catalysts. The effects of reaction temperature and time on the formation of copolyesters were investigated in order to obtain an optimum condition for copolyester manufacturing. The optimal reaction temperature and time were found to be 290 to 310 degrees C and 90 to 120 min, respectively. Most of these copolyesters have better solubilities than polyethylene naphthalate (PEN) in aprotic solvents such as N-methyl-2-pyrrolidone or m-cresol. The thermal properties of the copolyesters were investigated by differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA). Glass transition temperatures of these copolyesters were in the range of 90 to 141 degrees C, and 10% weight loss values in nitrogen were all above 460 degrees C. (C) 1995 John Wiley & Sons, Inc. [References: 17]
机译：由萘二（羟乙基）萘酸酯（BHEN）和各种芳烷氧基二醇合成了含有萘结构的共聚酯。起始双（4-（2-羟基乙氧基）芳基）化合物是在碘化钾（KI）存在下，将各种双酚用碳酸亚乙酯进行亲核取代而得到的。在金属催化剂的存在下通过熔融缩聚获得具有0.50至0.60dL / g的特性粘度的共聚酯。研究了反应温度和时间对共聚酯形成的影响，以便获得用于共聚酯生产的最佳条件。发现最佳反应温度和时间分别为290至310℃和90至120分钟。这些共聚酯中的大多数在非质子传递溶剂（例如N-甲基-2-吡咯烷酮或间甲酚）中的溶解度比聚萘二甲酸乙二醇酯（PEN）好。通过差示扫描量热法（DSC）和热重分析（TGA）研究了共聚酯的热性能。这些共聚酯的玻璃化转变温度在90至141摄氏度的范围内，氮气中10％的失重值均在460摄氏度以上。（C）1995 John Wiley＆Sons，Inc. [参考：17]

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