Preparation method of polybutylene succinate
A technology for polybutylene succinate and succinic acid is applied in the field of ester preparation, which can solve the problems of complex preparation method, difficulty in popularization and application, and achieve the effects of low preparation cost and simple operation.
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Embodiment 1
[0017] The preparation method of polybutylene succinate comprises the following steps:
[0018] (1) Esterification reaction: Add 0.1 mol of succinic acid, 0.11 mol of butanediol and 0.01 mol of butyl titanate into a 250 mL three-neck round bottom flask, heat in an oil bath, and control the temperature at 130°C under stirring. Water vacuum pump depressurizes to -0.1MPa, reacts for 2h;
[0019] (2) Polycondensation reaction: add nitrogen, stir, raise the temperature of the oil bath to 220°C, remove the nitrogen, use a circulating water vacuum pump to depressurize to -0.1MPa, and react at a constant temperature for 2 hours, stop heating and stirring, remove the oil bath, and cool naturally To room temperature, obtain thick polybutylene succinate;
[0020] (3) Purification of polybutylene succinate: dissolve the crude polybutylene succinate obtained in step (2) with 200 mL of chloroform to obtain trichloromethane of crude polybutylene succinate methane solution, then under the c...
Embodiment 2
[0022] The preparation method of polybutylene succinate comprises the following steps:
[0023] (1) Esterification reaction: Add 0.1 mol of succinic acid, 0.11 mol of butanediol and 0.01 mol of butyl titanate into a 250 mL three-neck round bottom flask, heat in an oil bath, and control the temperature at 150°C under stirring. Water vacuum pump depressurizes to -0.1MPa, reacts for 2h;
[0024] (2) Polycondensation reaction: Introduce nitrogen, stir, raise the temperature of the oil bath to 230°C, remove the nitrogen, use a circulating water vacuum pump to depressurize to -0.1MPa, react at constant temperature for 2 hours, stop heating and stirring, remove the oil bath, and cool naturally To room temperature, obtain thick polybutylene succinate;
[0025] (3) Purification of polybutylene succinate: dissolve the crude polybutylene succinate obtained in step (2) with 200 mL of chloroform to obtain trichloromethane of crude polybutylene succinate methane solution, then under the c...
Embodiment 3
[0027] The preparation method of polybutylene succinate comprises the following steps:
[0028] (1) Esterification reaction: Add 0.1 mol of succinic acid, 0.11 mol of butanediol and 0.01 mol of butyl titanate into a 250 mL three-neck round bottom flask, heat in an oil bath, and control the temperature at 140°C under stirring. Water vacuum pump depressurizes to -0.1MPa, reacts for 2h;
[0029] (2) Polycondensation reaction: add nitrogen, stir, raise the temperature of the oil bath to 225°C, remove the nitrogen, use a circulating water vacuum pump to depressurize to -0.1MPa, react at a constant temperature for 2 hours, stop heating and stirring, remove the oil bath, and cool naturally To room temperature, obtain thick polybutylene succinate;
[0030] (3) Purification of polybutylene succinate: dissolve the crude polybutylene succinate obtained in step (2) with 200 mL of chloroform to obtain trichloromethane of crude polybutylene succinate methane solution, then under the condi...
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