Transparent and toughening polylactic acid resin and method for preparing the same
A polylactic acid resin and polylactic acid technology, which is applied in the field of polymer materials, can solve the problems of improving the impact strength of polylactic acid resin, the brittleness of polylactic acid resin affecting the wide application of polylactic acid, etc., and achieves great economic and social significance. The effect of declining, promising market prospects
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Embodiment 1
[0022] Embodiment 1: The present invention provides a kind of transparent and toughened polylactic acid resin, and the composition of its formula and the proportioning of mass parts are:
[0023] The number average molecular weight of polylactic acid is 80,000 100 parts;
[0024] 18 parts of toughening agent;
[0025] For the toughening agent methyl methacrylate-butyl acrylate copolymer, the mass percentage content of methyl methacrylate in the copolymer composition is 17%, and the mass percentage content of butyl acrylate is 83%;
[0026] 8 parts of plasticizer acetyl tri-n-butyl citrate;
[0027] The antioxidant is tetrakis(β-(3,5-di-tert-butyl-4-hydroxy) propionate) pentaerythritol ester and tris(2,4-di-tert-butylphenyl phosphite) with a mass ratio of 1:2 ) ester mixture 0.5 parts.
[0028] Weigh each component according to the above formula, mechanically blend each component for 5 minutes, then add the mixed material into a twin-screw extruder to melt, extrude and granu...
Embodiment 2
[0030] Embodiment 2: The present invention provides a kind of transparent and toughened polylactic acid resin, and the composition of its formula and the proportioning of mass parts are:
[0031] The number average molecular weight of polylactic acid is 80,000 100 parts;
[0032] 22 parts of toughening agent;
[0033] For the toughening agent methyl methacrylate-butyl acrylate copolymer, the mass percentage content of methyl methacrylate in the copolymer is 17%, and the mass percentage content of butyl acrylate is 83%;
[0034] 5 parts of plasticizer acetyl tri-n-butyl citrate;
[0035] The antioxidant is tetrakis(β-(3,5-di-tert-butyl-4-hydroxy) propionate) pentaerythritol ester and tris(2,4-di-tert-butylphenyl phosphite) with a mass ratio of 1:2 ) ester mixture 0.3 parts.
[0036]Weigh each component according to the above formula, mechanically blend each component for 5 minutes, then add the mixed material into a twin-screw extruder to melt, extrude and granulate to obtai...
Embodiment 3
[0037] Embodiment 3: each component is taken by following formula and quality:
[0038] The number average molecular weight of polylactic acid is 200,000 100 parts;
[0039] 18 parts of toughening agent;
[0040] For the toughening agent methyl methacrylate-butyl acrylate copolymer, the mass percentage content of methyl methacrylate in the copolymer is 15%, and the mass percentage content of butyl acrylate is 85%;
[0041] 8 parts of plasticizer acetyl tri-n-butyl citrate;
[0042] The antioxidant is tetrakis(β-(3,5-di-tert-butyl-4-hydroxy) propionate) pentaerythritol ester and tris(2,4-di-tert-butylphenyl phosphite) with a mass ratio of 1:2 ) ester mixture 0.3 parts.
[0043] Weigh each component according to the above formula, mechanically blend each component for 5 minutes, then add the mixed material into a twin-screw extruder to melt, extrude and granulate to obtain a transparent and toughened polylactic acid resin; The conditions for extrusion granulation are: the se...
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