A kind of polylactic acid composition containing amide type nucleating agent and preparation method thereof
The technology of a nucleating agent and polylactic acid is applied to the polylactic acid composition containing an amide-type nucleating agent and the field of preparation thereof, and achieves the effects of good compatibility, uniform component distribution and simple post-processing
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Embodiment 1
[0030] An amide-type nucleating agent is prepared by the following steps:
[0031] Step A1: First, 1 mol of trimesic acid and 3 mol of triphosgene are mixed and dissolved in 15 mol of ethyl acetate solvent, then 1.5 mol of N,N-dimethylformamide is added dropwise, the temperature is raised to 60° C., and the reaction is kept for 6.5 h. to obtain trimesoyl chloride solution;
[0032] Step A2: Dissolve 3mol of 1-aminoindane in 5mol of ethyl acetate solvent, then dropwise add the trimesoyl chloride solution obtained in Step A1, strictly control the temperature of the reaction system to be 30°C during the dropwise addition, and heat up after the dropwise addition to 75 °C, stop heating after 7 hours of reaction, cool down to 55 °C, suction filtration to obtain a filter cake, and crush the filter cake to obtain a crude nucleating agent;
[0033] The reaction process is as follows:
[0034]
[0035] Step A3: Wash the crude nucleating agent with boiling water, after suction filtr...
Embodiment 2
[0037] An amide-type nucleating agent is prepared by the following steps:
[0038] Step A1: First, 1 mol of trimesic acid and 3 mol of triphosgene are mixed and dissolved in 15 mol of ethyl acetate solvent, then 1.5 mol of N,N-dimethylformamide is added dropwise, the temperature is raised to 65 ° C, and the reaction is incubated for 8 h, and the synthesis is obtained. trimesic acid chloride solution;
[0039] Step A2: Dissolve 3mol 5-aminoindane in 5mol ethyl acetate solvent, then dropwise add the trimesoyl chloride solution obtained in Step A1, strictly control the temperature of the reaction system to be 50°C during the dropwise addition, and heat up after the dropwise addition to 77°C, stop heating after 10 hours of reaction, cool down to 40°C, suction filtration to obtain a filter cake, and crush the filter cake to obtain a crude nucleating agent;
[0040] The reaction process is as follows:
[0041]
[0042] Step A3: Wash the crude nucleating agent with boiling water...
Embodiment 3-8
[0044] A polylactic acid composition is prepared from the following steps:
[0045] Step S1, take by weighing L-polylactic acid, nucleating agent, antioxidant 1010 and polycarbodiimide respectively according to the formula data in Table 1 below, add all raw materials into the high-speed mixer, stir 10min to obtain a mixture;
[0046] Step S2, adding the mixture into a twin-screw extruder for granulation, the melting temperature is 210° C., the screw length-diameter ratio is 35, extruding and granulating after melting and plasticizing, and drying to obtain a polylactic acid composition.
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