Polylactic acid-based bio-based polyesteramide and preparation method thereof
A technology of polyester amide and polylactic acid, which is applied in the field of bio-based polyester amide based on polylactic acid and its preparation, can solve the problems of brittle performance, poor heat resistance and thermal stability, and achieve improved performance and good thermal stability. , the effect of expanding the scope of application
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Embodiment 1
[0025] Example 1: 100 parts of polylactic acid prepolymer and 100 parts of polycaprolactam 6 prepolymer are fully mixed and placed in a reactor with a stirring device, and then 0.5 parts of SnCl are added 2 As a catalyst, nitrogen, vacuum, repeat the process of nitrogen and vacuum three times, replace the air in the reactor, vacuum control the pressure of the reaction system at -0.04 ~ -0.08MPa, first melt reaction at 145 ° C for 2 hours , and then heated up to 180°C for 5 hours of melt co-condensation to obtain a polyester amide copolymer. TGA analysis showed that the initial decomposition temperature and final decomposition temperature were 335.02°C and 429.61°C.
Embodiment 2
[0026] Example 2: 100 parts of polylactic acid prepolymer and 70 parts of polycaprolactam 66 prepolymer are fully mixed and evenly placed in a reactor with a stirring device, and then 1 part of SnCl is added 2 As a catalyst, nitrogen, vacuum, repeat the process of nitrogen and vacuum three times, replace the air in the reactor, vacuum control the pressure of the reaction system at -0.04 ~ -0.08MPa, first melt reaction at 145 ° C for 3 hours , and then heated up to 190°C for 3 hours to melt and copolymerize to obtain a polyester amide copolymer. TGA analysis showed that the initial decomposition temperature and final decomposition temperature were 303.97°C and 424.96°C.
Embodiment 3
[0027] Example 3: 100 parts of polylactic acid prepolymer and 50 parts of polycaprolactam 1010 prepolymer are fully mixed and evenly placed in a reactor with a stirring device, and then 3 parts of SnCl are added 2 As a catalyst, nitrogen, vacuum, repeat the process of nitrogen and vacuum three times, replace the air in the reactor, vacuum control the pressure of the reaction system at -0.04 ~ -0.08MPa, first melt reaction at 145 ° C for 1 hour , and then heated up to 170°C for 7 hours to melt and copolymerize to obtain a polyester amide copolymer. TGA analysis showed that the initial decomposition temperature and final decomposition temperature were 295.02°C and 410.92°C.
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