CN115449205A - Polycarbonate composition and preparation method and application thereof - Google Patents
Polycarbonate composition and preparation method and application thereof Download PDFInfo
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- CN115449205A CN115449205A CN202211010577.1A CN202211010577A CN115449205A CN 115449205 A CN115449205 A CN 115449205A CN 202211010577 A CN202211010577 A CN 202211010577A CN 115449205 A CN115449205 A CN 115449205A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
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Abstract
The invention relates to a polycarbonate composition, a preparation method and application thereof. The composition comprises the following components in parts by weight: 70-95 parts of PC resin; 5-30 parts of PET resin; 0.001-0.06 part of size stabilizer. The composition has good solvent resistance, dimensional stability, molding processability and toughness.
Description
Technical Field
The invention belongs to the technical field of engineering plastics, and particularly relates to a polycarbonate composition, and a preparation method and application thereof.
Background
PC is widely used in various fields due to excellent physical properties such as impact resistance, heat resistance, mechanical properties and dimensional stability. At present, pure PC is relatively mature when applied to precision injection molding parts, part of consumer electronics, household appliances, OA and automobile parts simultaneously meet the requirement of chemical resistance, and the pure PC faces the problem of cracking. Chinese patent CN102027065A discloses dimensionally stable polycarbonate compositions wherein the polyester used is a non-crystalline polyester, whereas the dimensional stability is poorer than when a crystalline polyester is used. The PC has larger molecular volume, so that the internal stress of a formed product is larger, and the chemical resistance is poorer, and the chemical resistance of the PC is improved by adding polyester, such as PET or PBT resin.
The PET molecular chain has a symmetrical benzene ring structure, and has the advantages of heat resistance, chemical resistance, high mechanical strength and excellent electrical property. The PC/PET alloy can improve the chemical resistance, the fluidity and the stress cracking resistance of PC. However, the decrystallization of PET causes the alloy to have the problem of easy warping, and the application of part of high-demand products has difficulty.
At present, the difficulty of applying the PC/PET alloy to precision assembly parts is higher, particularly in the fields of solvent resistance and high requirement on dimensional flatness, and related technologies are rarely reported.
Disclosure of Invention
The invention aims to solve the technical problem of providing a polycarbonate composition, a preparation method and application thereof, so as to overcome the defects of solvent resistance and poor dimensional stability of PC/PET alloy in the prior art.
The invention provides a polycarbonate composition, which comprises the following components in parts by weight:
70-95 parts of PC resin;
5-30 parts of PET resin;
0.001-0.06 part of size stabilizer;
the size stabilizer is a compound of metallic antimony.
Preferably, the composition comprises the following components in parts by weight:
75-92 parts of PC resin;
8-25 parts of PET resin;
0.005-0.03 part of size stabilizer.
Preferably, the PC resin is an aromatic polycarbonate.
Preferably, the viscosity average molecular weight of the PC resin is 23000-35000.
Preferably, the water content of the PC resin and the PET resin is 0.15% or less. When the moisture content is better, in the extrusion process, under the effect of heat and shearing, moisture makes PC and PET take place slight degradation, and the fracture of molecular chain makes material toughness receive the influence, and more importantly at PC/PET's alloy system, the hydrone has participated in the macromolecular reaction, makes PC and PET's macromolecular reaction become more violent and random, and the molecular chain breaks, and PET crystallization zone receives destruction to influence solvent resistance and toughness. The moisture content was tested as ASTM D570-2010, with the moisture content measured as being measured by placing in a 50% RH environment at 23 ℃ for 24 h.
More preferably, the water content of the PC resin and the PET resin is 0.03-0.1%.
Preferably, the antimony compound comprises Sb 2 O 3 One or more of antimony acetate and ethylene glycol antimony.
Preferably, the Sb is 2 O 3 The D50 particle size is 0.5-1.2um.
Preferably, the composition also comprises 0-2 parts of other auxiliary agents.
Preferably, the other auxiliaries comprise antioxidants and/or lubricants.
Preferably, the weight portion of the antioxidant is 0.1-0.5.
Preferably, the antioxidant comprises one or more of hindered phenol antioxidant, phosphite antioxidant and thioether antioxidant.
Preferably, the lubricant is 0.1-0.5 parts by weight.
Preferably, the lubricant comprises one or more of glyceryl stearate, E wax and ethylene bis stearamide.
The invention also provides a preparation method of the polycarbonate composition, which comprises the following steps:
mixing the components, adding the obtained premix into a double-screw extruder for melt mixing, extruding and granulating to obtain the polycarbonate composition.
Preferably, the length-diameter ratio of a screw of the double-screw extruder is 40-48, the barrel temperature is 220-260 ℃, and the screw rotating speed is 400-500 rpm.
The invention also provides an application of the polycarbonate composition in consumer electronics, household appliances, repeat printers or automobiles, such as earphones, tablet computers, coffee machines, printer housings, automobile door handles, horn supports and the like.
In the process of melting and blending PC and PET at high temperature, a very small amount of metal antimony compounds improve the compatibility of PC and PET, so that a homogeneous system is formed, the molecular chain of the material after homogeneous slipping is relatively difficult, the toughness of the material can be improved, and in addition, the crystallization of PET is adjusted and controlled, is uniformly dispersed in the blending system, and cannot generate two-dimensional orientation, so that the flatness on a two-dimensional plane is improved.
Advantageous effects
The addition of PET in PC raises the solvent resistance and forming processability of the product, but has the problem of poor dimensional stability.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
And (3) reagent sources:
PC resin 1: aromatic polycarbonate with a viscosity average molecular weight of 23000 and a water content of 0.08%, PC S-3000F, mitsubishi, japan;
PC resin 2: aromatic polycarbonate with viscosity average molecular weight of 35000 and water content of 0.12%, PC E-1000F, mitsubishi, japan;
PC resin 3: an aromatic polycarbonate having a viscosity average molecular weight of 25000 and a water content of 0.02%, PC S-2000F, mitsubishi, japan;
PC resin 4: aromatic polycarbonate with viscosity average molecular weight of 16000 and water content of 0.16%, PC H-4000F, mitsubishi;
PC resin 5: an aromatic polycarbonate having a viscosity average molecular weight of 40000 and a water content of 0.17%, PC K-1000F, mitsubishi, japan;
PET resin 1: water content of 0.06%, BG80, huarun chemical;
PET resin 2: water content of 0.12%, FG600, huarun chemical;
PET resin 3: the water content is 0.02%, SB500, standard chemical;
PET resin 4: water content of 0.23%, r-PET Pellet, didorama;
compounds of metallic antimony:
Sb 2 O 3 1: d50 particle size is 0.6um, S-12N, the tin mine sparkling antimony industry;
Sb 2 O 3 2: d50 particle size of 0.8um, WSC-S, belgian Kepin group;
Sb 2 O 3 3: d50 particle size of 0.3um, antimony trioxide, neuro nanometer;
Sb 2 O 3 4: d50 particle size of 3.5um, antimony trioxide, tin mine flash antimony industry;
antimony acetate: liaoyang synthetic catalyst Co., ltd;
ethylene glycol antimony: hunan Ye xing Sb Ye;
copper oxide: DXN-CU05, darcy nanociake;
other auxiliary agents:
antioxidant: hindered phenols, antioxidant 1010, commercially available;
lubricant: glyceryl stearate lubricant, PETS-AP, commercially available;
unless otherwise specified, certain components (e.g., antioxidant, lubricant) in the parallel examples and comparative examples of the present invention are the same commercial products.
A method of making a polycarbonate composition, comprising: mixing the components according to the mixture ratio of table 1, table 2 and table 3, adding the obtained premix into a double-screw extruder for melt mixing, extruding and granulating to obtain the polycarbonate composition, wherein the length-diameter ratio of a screw of the double-screw extruder is 1-48, the temperature of a screw cylinder is 220-260 ℃, and the rotation speed of the screw is 400-500 rpm.
And (3) performance testing:
(1) Solvent resistance: according to the standard ASTM D543-2014, after hand cream (brand: CUCINA flows & pass) is smeared on a test piece (test piece thickness is 3.2 mm) for tensile strength test in a 1.0% strain fixture, appearance change is observed, and four grades of A (no crack), B (crack, no through crack, crack number less than or equal to 10), C (severe crack, through crack, crack number greater than or equal to 10 and less than or equal to 20) and D (crack, through crack is larger, so that a sample strip is cracked and can not be connected) are divided according to the weight of the crack.
(2) Notched izod impact strength: notched Izod impact strength was determined according to the standard ASTM D256-2010 at 23 ℃ using a 3.2mm thick molded notched Izod impact bar, the results being reported in J/m.
(3) Dimensional stability: the composition was injection-molded (injection temperature 250 ℃ C., injection speed 50 mm/s) into a 1 mm-thick disc having a diameter of 100mm, left for 24 hours, and the disc was placed on a marble table so that the center portion of the disc was in contact with the marble. The height of the disc ends was determined using the 3D shape of keyence. Warpage amount (mm) = disc edge height maximum (mm) -disc thickness (mm).
(4) Melt Flow Rate (MFR): the plastic pellets were allowed to melt into plastic fluid at a temperature and pressure for a period of time (10 minutes), and then passed through a 2.1mm diameter circular tube to give a gram flow. The larger the value, the better the processing fluidity of the plastic material, and the worse the processing fluidity. Using the test standard ASTM D1238-2010, unit: g/10min, adopting the test conditions as follows: melt Flow Rate (MFR) at 260 ℃ under a load of 5 kg.
TABLE 1 examples 1-11 proportions (parts by weight)
TABLE 2 examples 12-18 proportions (parts by weight)
TABLE 3 comparative example proportions (parts by weight)
As is clear from tables 1 to 3, comparative example 1, in which no antimony metal compound was added, had a composition with a significantly larger amount of warpage than example 1. Comparative example 2 was added with a metallic antimony compound content less than the range of the present invention, and the composition had a significantly greater amount of warpage than example 1. Comparative example 3 added metallic antimony compound in an amount larger than the range of the present invention, the composition was inferior to example 1 in solvent resistance, dimensional stability, molding processability and toughness. Comparative example 4 other dimensional stabilizers were added, and the composition had greater warpage than example 1 and inferior solvent resistance and toughness to example 1. Therefore, the invention adds the antimony compound into the PC/PET alloy, can improve the dimensional stability and toughness of the composition, and has little influence on the solvent resistance and the molding processability of the composition.
Claims (10)
1. The polycarbonate composition is characterized by comprising the following components in parts by weight:
70-95 parts of PC resin;
5-30 parts of PET resin;
0.001-0.06 part of size stabilizer;
the size stabilizer is a compound of metallic antimony.
2. The composition according to claim 1, wherein the composition components comprise, in parts by weight:
75-92 parts of PC resin;
8-25 parts of PET resin;
0.005-0.03 part of size stabilizer.
3. The composition of claim 1, wherein the PC resin is an aromatic polycarbonate.
4. The composition of claim 1, wherein the viscosity average molecular weight of the PC resin is 23000 to 35000.
5. The composition according to claim 1, wherein the water content of the PC resin and the PET resin is 0.15% or less.
6. The composition as claimed in claim 1, wherein the compound of metallic antimony comprises Sb 2 O 3 One or more of antimony acetate and ethylene glycol antimony; the Sb 2 O 3 The D50 particle size is 0.5-1.2um.
7. The composition of claim 1, wherein the composition further comprises 0-2 parts of other auxiliary agents; the other auxiliary agents comprise an antioxidant and/or a lubricant.
8. A process for preparing a composition as claimed in any one of claims 1 to 7, comprising:
mixing the components, adding the obtained premix into a double-screw extruder for melt mixing, extruding and granulating to obtain the polycarbonate composition.
9. The method for preparing the polypropylene composition according to claim 8, wherein the screw length-diameter ratio of the twin-screw extruder is 40-48, the barrel temperature is 220-260 ℃, and the screw rotation speed is 400-500 rpm.
10. Use of a composition according to any one of claims 1 to 7 in consumer electronics, home appliances, rewinders or automobiles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211010577.1A CN115449205B (en) | 2022-08-23 | 2022-08-23 | Polycarbonate composition and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211010577.1A CN115449205B (en) | 2022-08-23 | 2022-08-23 | Polycarbonate composition and preparation method and application thereof |
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| CN115449205A true CN115449205A (en) | 2022-12-09 |
| CN115449205B CN115449205B (en) | 2023-09-05 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009155377A (en) * | 2007-12-25 | 2009-07-16 | Teijin Chem Ltd | Polycarbonate resin composition |
| CN109836795A (en) * | 2019-02-01 | 2019-06-04 | 华政炎 | One kind is from capacity increasing modifying PET/PC alloy and preparation method thereof |
| CN113637310A (en) * | 2021-08-17 | 2021-11-12 | 金发科技股份有限公司 | Polycarbonate/polyester alloy composition with long-term thermal oxidation stability and preparation method and application thereof |
| CN114106546A (en) * | 2021-10-26 | 2022-03-01 | 上海金发科技发展有限公司 | Polycarbonate alloy material and preparation method and application thereof |
-
2022
- 2022-08-23 CN CN202211010577.1A patent/CN115449205B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009155377A (en) * | 2007-12-25 | 2009-07-16 | Teijin Chem Ltd | Polycarbonate resin composition |
| CN109836795A (en) * | 2019-02-01 | 2019-06-04 | 华政炎 | One kind is from capacity increasing modifying PET/PC alloy and preparation method thereof |
| CN113637310A (en) * | 2021-08-17 | 2021-11-12 | 金发科技股份有限公司 | Polycarbonate/polyester alloy composition with long-term thermal oxidation stability and preparation method and application thereof |
| CN114106546A (en) * | 2021-10-26 | 2022-03-01 | 上海金发科技发展有限公司 | Polycarbonate alloy material and preparation method and application thereof |
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