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Silicon-containing polycarbonate and preparation method thereof
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A technology of polycarbonate and maleic anhydride, which is applied in the field of silicon-containing polycarbonate and its preparation, can solve problems restricting the application of silicon-containing polycarbonate, and achieve the effects of improving low-temperature toughness, saving production costs, and improving production efficiency
Active Publication Date: 2019-05-10
SHANGHAI KUMHO SUNNY PLASTICS
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Problems solved by technology
However, the synthesis process of silicon-containing polycarbonate mainly concentrates on a small number of polycarbonate manufacturers, and the price is much higher than that of ordinary polycarbonate, which seriously restricts the application of silicon-containing polycarbonate
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Embodiment 1
[0022] 1. Prepare materials according to the following components and parts by weight:
[0023]
[0024] 2. Add PC resin, polydimethylsiloxane, styrene-maleic anhydride copolymer SMA, antioxidant and lubricant into the mixing mixer for mixing;
[0025] 3. Blend and granulate the mixture in step 2 through a twin-screw extruder to obtain alloy particles. The barrel temperature of the extruder is 260° C., and the screw speed is 600 rpm.
[0026] The relative molecular weight of the PC resin is 6000g / mol, and its glass transition temperature is 150°C;
[0027] The styrene-maleic anhydride copolymer SMA is SMA 1000, and the molar ratio of styrene and maleic anhydride is 1:1;
[0028] The polydimethylsiloxane, through nSi(CH 3 ) 2 Cl 2 +nH 2 O→[Si(CH 3 ) 2 O] n +2nHCl reaction prepared for the end-capped product;
[0029] Described antioxidant is dioctadecyl alcohol pentaerythritol diphosphite;
[0030] The lubricant is a mixture of 0.2 part of liquid paraffin and 0.1 p...
Embodiment 2
[0032] 1. Prepare materials according to the following components and parts by weight:
[0033]
[0034]
[0035] 2. Add PC resin, polydimethylsiloxane, styrene-maleic anhydride copolymer SMA, antioxidant and lubricant into the mixing mixer for mixing;
[0036] 3. Blend and granulate the mixture in step 2 through a twin-screw extruder to obtain alloy particles. The barrel temperature of the extruder is 260° C., and the screw speed is 600 rpm.
[0037] The relative molecular weight of the PC resin is 6000g / mol, and its glass transition temperature is 150°C;
[0038] The styrene-maleic anhydride copolymer SMA is SMA 1000, and the molar ratio of styrene and maleic anhydride is 1:1;
[0039] The polydimethylsiloxane, through nSi(CH 3 ) 2 Cl 2 +nH 2 O→[Si(CH 3 ) 2 O] n +2nHCl reaction prepared for the end-capped product;
[0040] Described antioxidant is dioctadecyl alcohol pentaerythritol diphosphite;
[0041] The lubricant is a mixture of 0.2 part of liquid paraff...
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Abstract
The invention provides silicon-containing polycarbonate and a preparation method thereof. The silicon-containing polycarbonate is prepared from, by weight, 80-98 parts of PC resin, 1-10 parts of polydimethylsiloxane, 1-10 parts of SMA resin, 0.1-1 part of an antioxidant and 0.1-1 part of a lubricant. The preparation method includes the following steps that the PC resin, the polydimethylsiloxane, the SMA resin, the antioxidant and the lubricant are mixed, and blending and granulation are performed in a twin-screw extruder to obtain a product. The silicon-containing polycarbonate has the advantages that the silicon-containing polycarbonate is prepared through reactive extrusion, the polydimethylsiloxane is embedded into the polycarbonate through reactive extrusion, and accordingly the low temperature toughness of the materials is improved; in addition, the organic silicon content can be adjusted according to the adding parts of the polydimethylsiloxane as required, the method is flexible, fast and convenient, the expensive development costs are saved, and the method has the advantages of saving the production costs, improving production efficiency and being environmentally friendly.
Description
technical field [0001] The invention relates to a silicon-containing polycarbonate and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] Polycarbonate refers to a type of polymer whose macromolecular chain is composed of carbonate-type repeating structural units. The English name Polycarbonate, referred to as PC, has excellent impact resistance and transparency, excellent mechanical properties and electrical insulation. It is used Wide temperature range, high dimensional stability and high creep resistance, it is a typical plastic representative integrating rigidity, hardness and toughness. Due to these advantages, polycarbonate is widely used in many fields such as electronic appliances, office supplies, precision machinery, medical treatment, labor insurance, household goods and automobiles. However, as people's requirements for material properties are getting higher and higher, ordinary bisphenol A-based po...
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