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Method for synthesizing poly(butylene succinate) catalyzed by biogenic guanidinine
Method for synthesizing poly(butylene succinate) catalyzed by biogenic guanidinine
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机译:生物胍鸟碱催化合成聚丁二酸丁二酯的方法
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摘要
A method for synthesizing poly(butylene succinate) (PBS) having a weight average molecular weight (Mw) equal to or larger than 1.4×105. The method employs biogenic guanidine (BG) as the main catalyst and includes: a) adding succinic acid (SA), 1.4-butanediol (BDO), and biogenic guanidine to a reactor, heating the reactor to a temperature of between 180 and 200° C. and conducting the esterification between succinic acid and 1.4-butanediol for 2 to 3 hours under atmospheric pressure until all of the water is distilled or boiled off; and b) adding a first cocatalyst, a second cocatalyst, and a third cocatalyst to the reactor, adjusting the absolute pressure in the reactor to be between 0.5 and 3 torr, and polycondensing the mixture in the reactor at the temperature between 210 and 230° C. over 20 to 30 hours.
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机译:一种重均分子量(M w Sub>)等于或大于1.4×10 5 Sup>的聚丁二酸丁二酯(PBS)的合成方法。该方法采用生物胍(BG)作为主要催化剂,包括:a)向反应器中加入琥珀酸(SA),1.4-丁二醇(BDO)和生物胍,将反应器加热至180至200°之间的温度。 C.在大气压下使琥珀酸和1.4-丁二醇之间酯化2-3小时,直到所有水被蒸馏或蒸出为止; b)向反应器中加入第一助催化剂,第二助催化剂和第三助催化剂,将反应器中的绝对压力调节至0.5至3托之间,并在210至230°C的温度下使反应器中的混合物缩聚。 C. 20至30小时。
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