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A kind of degradable high flow pc/pla alloy material and preparation method thereof
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An alloy material, PETG-G-PLA technology, applied in the field of degradable high-flow PC/PLA alloy material and its preparation, can solve the problems of limited application, low notch impact, lack of flexibility and elasticity, etc., and achieve high toughness, high Mobility, environment-friendly effect
Inactive Publication Date: 2017-07-07
ANHUI KEJU NEW MATERIALS
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At the same time, PLA has high tensile strength and compression modulus, but it is hard, has poor toughness, lacks flexibility and elasticity, and is easy to bend and deform.
These disadvantages limit its application
[0003] Polycarbonate (PC) is a high molecular polymer containing carbonate groups in the molecular chain. It is an amorphous transparent engineering plastic. It has the advantages of high strength and modulus, high toughness, and low shrinkage, which can make up for the toughness of PLA. , the publication number is CN201010151864A Chinese patent application which discloses a halogen-free flame-retardant PC / ABS / PLA alloy, its strength and rigidity are better than ordinary flame-retardant PC / ABS, flame-retardant V0, but the notch impact is low, publication number CN201110056797 Chinese patent application discloses a PC / PLA alloy material, which uses a transesterification accelerator to increase the compatibility of PC and PLA, and a nucleating agent to increase the strength of the material to obtain a flame retardancy and mechanical properties Relatively balanced material, but there is still a big gap in impact strength compared with PC or PC / ABS
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[0078] Correspondingly, an embodiment of the present invention provides a method for preparing a degradable high-flow PC / PLA alloy material. The flow chart of the preparation method is as follows figure 1 Shown, this preparation method comprises the steps:
[0079] (1) Weigh the formula components
[0080] Weigh polycarbonate, polylactic acid, compatibilizer PETG-G-PLA, toughening agent, and other additives according to the formula of the above-mentioned degradable high-flow PC / PLA alloy material;
[0081] (2) Pretreatment
[0082] The PC weighed in step (1) was dried at 120°C for 3-4 hours, and the PLA and compatibilizer PETG-G-PLA were dehumidified and dried at 60°C for 4-6 hours.
[0083] (3) Prepare the mixture
[0084] Put the toughening agent and other auxiliary agents weighed in the step (2) through pretreated PC, PLA and compatibilizer PETG-G-PLA and the step (1) into a high-speed mixer and mix for 5-20min, Mix well to get a mixture;
[0097] (2) Pretreatment of symmetrical PLA and PETG
[0098] The PLA weighed in step (1) was dehumidified and dried at 60°C for 5 hours, and the PETG was dehumidified and dried at 80°C for 3 hours;
[0099] (3) Prepare the mixture
[0100] Put the pretreated PLA and PETG in the step (2) and the polyethylene glycol diglycidyl ether in the step (1) into a high-speed mixer for mixing to obtain a mixture;
[0102] Add the mixture obtained in step (3) into a twin-screw extruder, and melt and extrude it to obtain a compatibilizer PETG-G-PLA, select a co-rotating twin-screw extruder, L:D=41:1, extrude The temperature is 200-230°C, and the ...
Embodiment 2
[0116] The compatibilizer uses the PETG-G-PLA prepared in Example 1.
[0117] The degradable high-flow PC / PLA alloy material is composed of the following components in parts by weight: PC69%, PLA18%, PETG-G-PLA 5%, toughening agent AX8900 7%, antioxidant 1010 0.2%, Antioxidant 168 0.2%, lubricant TAF 0.6%, other steps are the same as embodiment 1.
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Abstract
The invention belongs to the technical field of high polymer material modification and provides a degradable high-flowability PC / PLA alloy material and a preparation method thereof. The degradable high-flowability PC / PLA alloy material is prepared from the following raw materials in percentage by weight: 45-80% of polycarbonate, 5-35% of polylactic acid, 2-10% of compatilizer PETG-G-PLA, 3-10% of a flexibilizer and 0.2-1% of other auxiliaries. After the raw materials are weighed in the percentage by weight, all the raw materials are mixed evenly, melt-extruded by use of a screw extruder and pelletized, and therefore, the degradable high-flowability PC / PLA alloy material can be obtained. The preparation method of the degradable high-flowability PC / PLA alloy material is simple in process and low in cost; the obtained degradable high-flowability PC / PLA alloy material has the characteristics of high flowability, high toughness, formability and high notch impact resistance; in addition, due to the addition of PLA, the alloy material has biodegradability, is more friendly to the environment and conforms to the development direction of materials at present.
Description
technical field [0001] The invention belongs to the field of polymer materials, in particular to a degradable high-flow PC / PLA alloy material and a preparation method thereof. Background technique [0002] Since the emergence of plastics, it has quickly occupied a place in the world. While bringing convenience to production and life, it has also caused the problem of white pollution. At the same time, due to the continuous reduction of petroleum resources, the cost of traditional plastics industries that use petroleum as raw materials has increased. Biodegradable plastics have replaced traditional plastics. Plastic will become a trend, and various degradable materials have been gradually developed and utilized by people. Among them, polylactic acid (PLA) is a more important one. PLA has excellent biocompatibility and biodegradability, and the final degradation products are carbon dioxide and water, which will not pollute the environment. At the same time, PLA has high tensi...
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