Polycarbonate composite material and preparation method thereof

A polycarbonate and composite material technology, applied in the field of polymer materials, can solve the problems of difficulty in simultaneously improving PC processing fluidity and notched impact strength, increasing material complexity and cost, and poor notched impact strength, etc. And the effect of flexible adjustment of molecular weight, viscosity reduction, and improved processing fluidity

Inactive Publication Date: 2015-07-08
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

ABS has good processing fluidity and formability, so it can obviously improve the disadvantages of poor processing fluidity and easy stress cracking after compounding with PC, but the notched impact strength of ABS is often not good, and the compatibility with PC is not good. , so PC / ABS composites often need to add some compatibilizers and elastomers to improve the impact strength of the composite, which increases the complexity and cost of the material
The other two main modes of toughening PC are to add acrylate polymer and high rubber powder, as Chinese patents CN102532855, CN101486825A and CN103834152A have announced the composite material of PC and acrylate polymer and its preparation method, Chinese patent CN103242637A, CN102604319A and CN103087495A disclose the PC composite material toughened by high rubber powder and its preparation method, and these two toughening methods also often involve the compatibility of modified materials and PC, without adding other components It is difficult to improve the processing fluidity and notched impact strength of PC at the same time

Method used

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  • Polycarbonate composite material and preparation method thereof
  • Polycarbonate composite material and preparation method thereof
  • Polycarbonate composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Embodiment 1, prepare polycarbonate composite material

[0060] Polycarbonate composites were prepared according to the following steps:

[0061] (1) Dry the linear bisphenol A type aromatic polycarbonate resin (trade name PC2200R, weight average molecular weight is 22000g / mol) at 100°C for 20 hours, polybutylene carbonate (weight average molecular weight is 85000g / mol) Dry at 60°C for 24 hours.

[0062] (2) In a high-speed stirrer, mix aromatic polycarbonate resin, aliphatic polycarbonate, primary antioxidant, secondary antioxidant and plasticizer according to the following proportions, in parts by weight, each The composition of the components is as follows:

[0063]

[0064] (3) Melting and extruding through a twin-screw extruder to prepare a polycarbonate composite material. Among them, the temperature and screw speed of each section of the twin-screw extruder are set as follows:

[0065] The temperature of the first and second stages is 240°C, the temperatur...

Embodiment 2

[0067] Embodiment 2, prepare polycarbonate composite material

[0068] Polycarbonate composites were prepared according to the following steps:

[0069] (1) Dry the linear bisphenol A type aromatic polycarbonate resin (the weight average molecular weight is 22000g / mol) at 110°C for 20 hours, polybutylene carbonate (the weight average molecular weight is 85000g / mol) at 80°C Let dry for 24 hours.

[0070] (2) In a high-speed stirrer, mix aromatic polycarbonate resin, aliphatic polycarbonate, primary antioxidant, secondary antioxidant and inorganic powder (with a particle size of 2 to 3 μm) uniformly in the following ratio , in parts by weight, each component is composed as follows:

[0071]

[0072] (3) Melting and extruding through a twin-screw extruder to prepare a polycarbonate composite material. Among them, the temperature settings of each section of the twin-screw extruder are as follows:

[0073] The temperature of the first and second stages is 220°C, the temperat...

Embodiment 3

[0075] Embodiment 3, prepare polycarbonate composite material

[0076] Polycarbonate composites were prepared according to the following steps:

[0077] (1) Dry the linear bisphenol A type aromatic polycarbonate resin (the weight average molecular weight is 22000g / mol) at 100°C for 20 hours, and dry polybutylene carbonate (the weight average molecular weight is 85000g / mol) at 70°C Let dry for 24 hours.

[0078] (2) In a high-speed mixer, mix aromatic polycarbonate resin, aliphatic polycarbonate, primary antioxidant, secondary antioxidant, inorganic powder (with a particle size of 4 to 5 μm) and plasticizer as follows Said ratio is mixed evenly, and in parts by weight, each component is composed as follows:

[0079]

[0080]

[0081] (3) Melting and extruding through a twin-screw extruder to prepare a polycarbonate composite material. Among them, the temperature settings of each section of the twin-screw extruder are as follows:

[0082] The temperature of the first a...

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Abstract

The invention discloses a polycarbonate composite material and a preparation method thereof. The polycarbonate composite material is composed of the following components in parts by weight: 50-95 parts of aromatic polycarbonate, 5-50 parts of fatty group polycarbonate, 0.1-0.3 part of main antioxidant, 0.1-2 parts of auxiliary antioxidant, 0-10 parts of inorganic powder and 0-5 parts of plasticizer. The preparation method comprises the following steps: 1) respectively drying the aromatic polycarbonate and fatty group polycarbonate at 50-120 DEG C for 4-30 hours; 2) mixing the components; and 3) carrying out melt extrusion on the mixture in the step (2) through a double screw extruder, and granulating. Under the condition of not adding any compatilizer or elastomer, the polycarbonate composite material has the advantages of high notch impact strength and favorable processing flowability, and is partially biodegradable. The fatty group polycarbonate has flexible and adjustable chemical structure and molecular weight, and can be prepared into a series of polycarbonate composite materials according to practical application demands.

Description

technical field [0001] The invention relates to a polycarbonate composite material and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] Polycarbonate (PC) is an engineering plastic with excellent mechanical, optical and heat-resistant properties. After realizing industrial production in the early 1960s, it has achieved large-scale industrial production by the end of the 1990s. It is currently the only The second largest engineering plastic after polyamide, it is widely used in various fields of national life. However, PC has poor processing fluidity, is sensitive to notches, is prone to stress cracking, and has low impact strength at low temperatures. [0003] There are many methods to improve its shortcomings by preparing PC alloys, among which the research on modifying PC by acrylonitrile-butadiene-styrene copolymer (ABS) is in the majority, as Chinese patents CN103289347, CN103772936 and CN103724964 all disclose PC ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L71/02C08K13/02C08K5/134C08K5/526C08K5/18C08K5/523C08K3/26B29C47/92B29C48/92
CPCB29C48/92B29C2948/92209C08K3/36C08K5/053C08K5/1345C08K5/526C08K13/02C08L69/00C08L2201/06C08L2205/025C08L2205/03C08L71/08C08K5/18C08K5/523C08K2003/265C08K5/524C08K3/34
Inventor 刘琛阳赵体鹏张宝庆朱文祥李春成张洁
Owner INST OF CHEM CHINESE ACAD OF SCI
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