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Degradable PC (Poly Carbonate)/PLA (Poly Lactic Acid) alloy and preparation method thereof

A technology of alloy and polycarbonate, which is applied in the field of degradable PC/PLA alloy and its preparation, can solve the problems that the toughness and heat resistance cannot meet the requirements of engineering plastics, and the comprehensive performance of PLA is not as good as that, so as to improve the heat resistance , good processing fluidity and excellent comprehensive performance

Inactive Publication Date: 2012-09-05
SHENZHEN FUHENG PLASTICS PIGMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the leading degradable plastic, the comprehensive performance of PLA is not as good as that of traditional engineering plastics, especially in terms of toughness and heat resistance, it is far from meeting the requirements of engineering plastics.

Method used

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  • Degradable PC (Poly Carbonate)/PLA (Poly Lactic Acid) alloy and preparation method thereof
  • Degradable PC (Poly Carbonate)/PLA (Poly Lactic Acid) alloy and preparation method thereof
  • Degradable PC (Poly Carbonate)/PLA (Poly Lactic Acid) alloy and preparation method thereof

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Experimental program
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preparation example Construction

[0049] The degradable PC / PLA alloy of the embodiment of the present invention can adopt same preparation method, comprises the following steps:

[0050] (1) Pretreatment of raw materials;

[0051] (2) Take each component according to the following weight percentages:

[0052]

[0053] (3) Mix all the raw materials taken by weighing;

[0054] (4) Add the mixed raw materials into a parallel twin-screw extruder, melt and extrude, and granulate.

[0055] Twin-screw machines are generally divided into the following parts: feeding system, gearbox, main motor, screw, barrel, heating system, vacuum system, cooling system, interlock control system, and electrical control system. Among them, in the temperature control section of the heating system, it is divided into the feeding area, the first area, the second area, the third area, and the fourth area.

[0056] Among them, the process conditions of the melting stage of the parallel twin-screw extruder in the embodiment of the prese...

Embodiment 1

[0058] (1) Pretreatment of raw materials: PC and PLA were dried separately, the drying temperature of PC was 110°C for 4 hours; the drying temperature of PLA was 60°C for 5 hours. The remaining materials were dried at 80°C for 6 hours;

[0059] (2) Weigh PC 73.5kg, PLA 20kg, EMA-GMA 4kg, antioxidant 10100.2kg, antioxidant 1680.2kg, lubricant TAF 0.6kg, transesterification accelerator tetrabutyl titanate 0.5kg, nucleating agent p-tert-butylcalix[8]arene 1kg;

[0060] (3) All the raw materials weighed were mixed in a high-speed mixer for 20 minutes;

[0061] (4) Put the uniformly mixed material into the hopper of the twin-screw extruder, melt, blend and extrude through the twin-screw extruder, water-cool, air-dry, pelletize, and finally pack into PC / PLA alloy finished products.

[0062] The above PC / PLA alloy was injected into a standard sample, and the test performance is shown in Table 1.

Embodiment 2

[0064] (1) Pretreatment of raw materials: PC and PLA were dried separately, the drying temperature of PC was 110°C for 4 hours; the drying temperature of PLA was 60°C for 5 hours. The remaining materials were dried at 80°C for 6 hours;

[0065] (2) Weigh 60kg of PC, 30kg of PLA, 4kg of EMA-GMA, 10760.2kg of antioxidant, 1680.2kg of antioxidant, 0.6kg of lubricant TAF, 0.4kg of PETS, and 1kg of tetrabutyl titanate as a transesterification accelerator. Nucleating agent p-tert-butylcalix[8]arene 1.5kg;

[0066] (3) All the raw materials weighed were mixed in a high-speed mixer for 20 minutes;

[0067] (4) Put the uniformly mixed material into the hopper of the twin-screw extruder, melt, blend and extrude through the twin-screw extruder, water-cool, air-dry, pelletize, and finally pack into PC / PLA alloy finished products.

[0068] The above PC / PLA alloy was injected into a standard sample, and the test performance is shown in Table 1.

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Abstract

The invention relates to the technical field of modification of thermoplastic high molecular materials, and discloses a degradable PC (Poly Carbonate) / PLA (Poly Lactic Acid) alloy which is applied to the aspects of household appliances, living goods, electronic and electrical equipment and the like. The degradable PC / PLA alloy is prepared from the following materials: PC, PLA, compatilizer, antioxidant, nucleating agent, ester exchange accelerator and processing aid. The invention also discloses a preparation method of the degradable PC / PLA alloy. The invention aims to provide a degradable PC / PLA alloy which can be degraded on the basis of ensuring good comprehensive performance, thereby reducing the pollution to the environment. The invention also aims to provide a preparation method of the degradable PC / PLA alloy.

Description

technical field [0001] The invention relates to the technical field of modification of thermoplastic polymer materials, in particular to a degradable PC / PLA alloy applied to household appliances, daily necessities, electronic appliances and the like and a preparation method thereof. Background technique [0002] Polycarbonate (PC) is a high molecular polymer containing carbonate groups in the molecular chain. It is an amorphous transparent engineering plastic with high strength and modulus, high toughness, low shrinkage and other advantages; but its melt viscosity Large size, poor fluidity, difficult processing and poor solvent resistance, etc., so its application range is limited. [0003] Polylactic acid (PLA), also known as polylactide, is a transparent and colorless thermoplastic. It is a new type of biodegradable material made of starch raw materials proposed by renewable plant resources (such as corn). Good biodegradability, after use, it can be completely degraded by...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L67/04C08L23/08B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/40
Inventor 郑辉申应军
Owner SHENZHEN FUHENG PLASTICS PIGMENT
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