CN111269548A - Heat-resistant low-temperature-resistant wear-resistant composition and preparation method thereof - Google Patents
Heat-resistant low-temperature-resistant wear-resistant composition and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a heat-resistant low-temperature-resistant wear-resistant composition and a preparation method thereof, wherein the wear-resistant composition comprises the following components in parts by weight: 39.9-52.6 parts by weight of polycarbonate; 35-47 parts of glass fiber reinforced PET; 10.5-12.3 parts by weight of polyethylene terephthalate; 0.2 to 0.3 weight portion of flame retardant; 0.2 to 0.3 weight portion of antioxidant; 0.2 to 0.3 part by weight of light stabilizer. The preparation method provided by the invention selects paraffin and a specific coupling agent to firstly modify the surface of the glass fiber powder, then blends the glass fiber powder with polyethylene terephthalate, and then blends the glass fiber powder with polycarbonate for extrusion, so that the composition has excellent wear resistance on the premise of ensuring good mechanical properties of the composition, particularly the laser engraved product has very good wear resistance, and can be widely applied to products needing laser engraving.
Description
Technical Field
The invention belongs to the field of high molecular polymers, and particularly relates to a heat-resistant low-temperature-resistant wear-resistant composition and a preparation method thereof.
Background
Polycarbonate (abbreviated as PC in english) is a high molecular polymer containing carbonate groups in its molecular chain, and is classified into various types such as aliphatic, aromatic, aliphatic-aromatic, and the like, depending on the structure of the ester groups. Polycarbonate has been widely used because of its high strength and modulus of elasticity, high impact strength, high transparency, and good dimensional stability.
Three major application fields of PC engineering plastics are the glazing industry, the automotive industry and the electronics and electrical appliance industry, and secondly, industrial machine parts, optical discs, packaging, computer and other office equipment, medical and health care, films, leisure and protective equipment, and the like. PC can be used as door and window glass, and PC laminates are widely used for protective windows in banks, embassys, detention places and public places, for aircraft cabin covers, lighting, industrial safety barriers and bullet-proof glass.
The PC board can be used as various signs, such as gasoline pump panels, automobile dashboards, warehouse and outdoor commercial signs, point-type sliding indicators, PC resin for automobile lighting systems, instrument panel systems and interior decoration systems, as front lamp covers, automobile front and rear baffles with reinforcing ribs, reflecting mirror frames, door frame sleeves, operating rod sheaths, spoilers, PC resin for junction boxes, sockets, plugs and sleeves, gaskets, television switching devices, connectors for communication cables under telephone line supports, switch boxes, telephone exchanges, switchboard components, relay housings. The PC can be used as low-load part for household appliance motor, vacuum cleaner, hair washer, coffee maker, bread toaster, handle of power tool, various gears, worm gear, shaft sleeve, guide gauge and shelf in refrigerator.
In the application field of PC, the PC composition is often required to have good wear resistance, and the product thereof is often required to be processed by laser etching, but the wear resistance of the laser etching product of the PC composition which is commonly used at present is not good.
Disclosure of Invention
The invention aims to provide a heat-resistant and low-temperature-resistant wear-resistant composition which has good heat resistance and low temperature resistance, good impact resistance and good wear resistance, and particularly has better wear resistance of a laser carving product.
It is necessary to provide a method for preparing the heat and low temperature resistant wear resistant composition.
A heat and low temperature resistant wear resistant composition comprising the following ingredients:
a polycarbonate;
glass fiber reinforced PET;
polyethylene terephthalate;
a flame retardant;
an antioxidant;
light stabilizers.
The heat-resistant low-temperature-resistant wear-resistant composition comprises the following components in parts by weight:
39.9-52.6 parts by weight of polycarbonate;
35-47 parts of glass fiber reinforced PET;
10.5-12.3 parts by weight of polyethylene terephthalate;
0.2 to 0.3 weight portion of flame retardant;
0.2 to 0.3 weight portion of antioxidant;
0.2 to 0.3 part by weight of light stabilizer.
Preferably, the sum of the parts by weight of the above components is 100 parts by weight.
More preferably, the heat-resistant and low-temperature-resistant wear-resistant composition comprises the following components in parts by weight:
46.4 parts by weight of polycarbonate;
42.5 parts by weight of glass fiber reinforced PET;
10.5 parts by weight of polyethylene terephthalate;
0.2 part by weight of flame retardant;
0.2 part by weight of antioxidant;
light stabilizer 0.2 part by weight.
Wherein the glass fiber reinforced PET is prepared by the following method:
adding 20-30 parts by weight of paraffin into 40-50 parts by weight of diethyl ether, heating until the paraffin is completely melted in the diethyl ether, adding glacial acetic acid to adjust the pH value of the solution to 5, adding 1.5-2 parts by weight of coupling agent, uniformly stirring, slowly adding 31-41 parts by weight of glass fiber powder at the adding speed of 100g/min, carrying out suction filtration at 60 ℃ to remove the diethyl ether, stirring for 2-3 hours at 70 ℃, then grinding in a high-speed grinder, and sieving with a 200-mesh sieve to obtain surface-modified glass fiber powder;
then adding 8-13 parts by weight of surface modified glass fiber powder and 8-13 parts by weight of polyethylene glycol terephthalate into a dispersion machine for uniform mixing, blending and extruding through a double-screw extruder, setting the temperature of the double-screw extruder at 250-260 ℃, and performing extrusion granulation and cooling to obtain the glass fiber reinforced PET.
Preferably, wherein the glass fiber reinforced PET is prepared by the following method:
adding 25 parts by weight of paraffin into 50 parts by weight of diethyl ether, heating until the paraffin is completely melted in the diethyl ether, adding glacial acetic acid to adjust the pH value of the solution to 5, adding 1.8 parts by weight of coupling agent, stirring uniformly, slowly adding 36 parts by weight of glass fiber powder at the adding speed of 100g/min, carrying out suction filtration at 60 ℃ to remove the diethyl ether, stirring for 2.5 hours at 70 ℃, then grinding in a high-speed grinder, and sieving with a 200-mesh sieve to obtain surface-modified glass fiber powder;
then adding 10 parts by weight of surface modified glass fiber powder and 10 parts by weight of polyethylene glycol terephthalate into a dispersion machine for uniform mixing, blending and extruding through a double-screw extruder, setting the temperature of the double-screw extruder at 250-260 ℃, and performing extrusion granulation and cooling to obtain the glass fiber reinforced PET.
The specification of the glass fiber powder is 800-1000 meshes, the particle size specification of the glass fiber has a relatively obvious influence on the performance of the composition, and particularly has a relatively large influence on the wear resistance of a laser carving product prepared from the composition.
Wherein the coupling agent is a titanate coupling agent or/and a silane coupling agent. Preferably, the coupling agent is prepared from a titanate coupling agent or/and a silane coupling agent in a ratio of 1: 1 part by weight.
Preferably, the density of the polycarbonate is 1200KG/m3Tested according to standard ISO 1183.
Preferably, the flame retardant is selected from decabromodiphenylethane or melamine urate.
Preferably, the light stabilizer is a hindered amine light stabilizer or benzoate ultraviolet light absorber, preferably 2,2,6, 6-tetramethyl-4-piperidine stearate.
Preferably, the antioxidant is selected from one or more of pentaerythritol tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], dilauryl thiodipropionate and triphenyl phosphite.
Preferably, the antioxidant is selected from one or more of antioxidant 1010, antioxidant DLTP or antioxidant TPP.
Preferably, the polyethylene terephthalate (PET) has a density of 1.18g/cm3-1.20g/cm3Test standard ASTM D792;
preferably, the paraffin wax is a semi-refined paraffin wax, more preferably a paraffin wax having a melting point of 58 degrees celsius.
The invention also provides a preparation method of the heat-resistant and low-temperature-resistant wear-resistant composition, which comprises the following steps:
uniformly mixing polycarbonate, glass fiber reinforced PET, polyethylene terephthalate, a flame retardant, an antioxidant and a light stabilizer in parts by weight, blending and extruding through a double-screw extruder, setting the temperature of the double-screw extruder at 260-270 ℃, and performing extrusion granulation and cooling to obtain the composition.
The preparation method comprises the following steps:
1) adding 20-30 parts by weight of paraffin into 40-50 parts by weight of diethyl ether, heating until the paraffin is completely melted in the diethyl ether, adding glacial acetic acid to adjust the pH value of the solution to 5, adding 1.5-2 parts by weight of coupling agent, uniformly stirring, slowly adding 31-41 parts by weight of glass fiber powder at the adding speed of 100g/min, carrying out suction filtration at 60 ℃ to remove the diethyl ether, stirring for 2-3 hours at 70 ℃, then grinding in a high-speed grinder, and sieving with a 200-mesh sieve to obtain surface-modified glass fiber powder;
2) then adding 8-13 parts by weight of surface modified glass fiber powder and 8-13 parts by weight of polyethylene glycol terephthalate into a dispersion machine for uniform mixing, blending and extruding through a double-screw extruder, setting the temperature of the double-screw extruder to be 250-260 ℃, and obtaining glass fiber reinforced PET after extrusion granulation and cooling;
3) uniformly mixing polycarbonate, glass fiber reinforced PET, polyethylene terephthalate, a flame retardant, an antioxidant and a light stabilizer in parts by weight, blending and extruding through a double-screw extruder, setting the temperature of the double-screw extruder at 260-270 ℃, and performing extrusion granulation and cooling to obtain the composition.
The addition amount of the paraffin in the invention can influence the final proportion of the paraffin in the composition, when the paraffin is in a certain range, the addition of the paraffin does not influence the tensile strength and the impact resistance of the composition, and can also improve the wear resistance of the composition, especially the wear resistance of a laser engraving product, but when the paraffin exceeds a certain proportion, the mechanical property of the composition can be obviously reduced, and the application is not facilitated.
Compared with the prior art, the composition provided by the invention is prepared by mixing and extruding polycarbonate, glass fiber reinforced PET, polyethylene glycol terephthalate, a flame retardant, an antioxidant and a light stabilizer, wherein paraffin and a specific coupling agent are used for carrying out surface modification on glass fiber powder, then the glass fiber powder is blended with the polyethylene glycol terephthalate, and then the polyethylene glycol terephthalate is blended and extruded with the polycarbonate.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments in order to make the technical field better understand the scheme of the present invention.
Description of raw materials:
paraffin wax: semi-refined paraffin, hebei xin lang chemical technology ltd, No. 58 #;
the coupling agent is titanate coupling agent 101 and silane coupling agent KH-602, and the ratio of 1: 1 parts by weight;
titanate coupling agent 101 (titanate TTS): titanate 101 is a monoalkoxytitanate coupling agent, Kenrich petrochemical company, usa under the designation: KR-TTS;
silane coupling agent KH-602, N- β -aminoethyl-gamma-aminopropylmethyldimethoxysilane, Shanghai Pensso Biotechnology Ltd;
polycarbonate (PC), Shanghai Kensichu, brand 6555, 1200KG/m3Density is measured according to standard ISO 1183;
the glass fiber powder has the specifications of 500 meshes, 800 meshes, 1000 meshes and 1200 meshes respectively;
chopped glass fiber: diameter of 13 μm, length of 3mm, Hangzhou high-tech composite Co., Ltd;
polyethylene terephthalate (PET): germany Bayer, type 2407, density 1.18g/cm3-1.20g/cm3Test standard ASTM D792;
antioxidant: an antioxidant 1010;
flame retardant: melamine urate;
light stabilizer: 2,2,6, 6-tetramethyl-4-piperidyl stearate.
Example 1
The composition was prepared as follows
1) Adding 25 parts by weight of paraffin into 50 parts by weight of diethyl ether, heating until the paraffin is completely dissolved in the diethyl ether, adding glacial acetic acid to adjust the pH value of the solution to 5, adding 1.8 parts by weight of coupling agent (titanate 101 and silane coupling agent KH-602 in a weight ratio of 1: 1 compounding), stirring uniformly, slowly adding 36 parts by weight of glass fiber powder (800 meshes), wherein the adding speed is 100g/min, carrying out suction filtration at 60 ℃ to remove ether, stirring at 70 ℃ for 2.5 hours, then grinding in a high-speed grinder, and sieving with a 200-mesh sieve to obtain surface-modified glass fiber powder;
2) adding 10 parts by weight of surface-modified glass fiber powder and 10 parts by weight of polyethylene glycol terephthalate into a dispersion machine, uniformly mixing, and blending and extruding through a double-screw extruder, wherein the temperature of the double-screw extruder is set to 250-260 ℃, and the glass fiber reinforced PET is obtained after extrusion, granulation and cooling;
3) uniformly mixing polycarbonate, glass fiber reinforced PET, polyethylene terephthalate, a flame retardant, an antioxidant and a light stabilizer according to the weight parts shown in Table 1, blending and extruding through a double-screw extruder, setting the temperature of the double-screw extruder at 260 ℃ and 270 ℃, and performing extrusion granulation and cooling to obtain the composition.
Example 2
The composition was prepared as follows
1) Adding 20 parts by weight of paraffin into 40 parts by weight of diethyl ether, heating until the paraffin is completely dissolved in the diethyl ether, adding glacial acetic acid to adjust the pH value of the solution to 5, and adding 2 parts by weight of coupling agent (titanate 101 and silane coupling agent KH-602 in a weight ratio of 1: 1 compounding), stirring uniformly, slowly adding 41 parts by weight of glass fiber powder (1000 meshes), wherein the adding speed is 100g/min, carrying out suction filtration at 60 ℃ to remove ether, stirring for 2 hours at 70 ℃, then grinding in a high-speed grinder, and sieving with a 200-mesh sieve to obtain surface-modified glass fiber powder;
2) adding 13 parts by weight of surface-modified glass fiber powder and 8 parts by weight of polyethylene glycol terephthalate into a dispersion machine, uniformly mixing, and blending and extruding through a double-screw extruder, wherein the temperature of the double-screw extruder is set to 250-260 ℃, and the glass fiber reinforced PET is obtained after extrusion, granulation and cooling;
3) uniformly mixing polycarbonate, glass fiber reinforced PET, polyethylene terephthalate, a flame retardant, an antioxidant and a light stabilizer according to the weight parts shown in Table 1, blending and extruding through a double-screw extruder, setting the temperature of the double-screw extruder at 260 ℃ and 270 ℃, and performing extrusion granulation and cooling to obtain the composition.
Example 3
The composition was prepared as follows
Adding 30 parts by weight of paraffin into 50 parts by weight of diethyl ether, heating until the paraffin is completely melted in the diethyl ether, adding glacial acetic acid to adjust the pH value of the solution to 5, adding 1.5 parts by weight of coupling agent (titanate 101 and silane coupling agent KH-602 are compounded according to the weight ratio of 1: 1), uniformly stirring, slowly adding 31 parts by weight of glass fiber powder (800 meshes) at the adding speed of 100g/min, carrying out suction filtration at 60 ℃ to remove the diethyl ether, stirring for 3 hours at 70 ℃, then grinding in a high-speed grinder, and sieving with a 200-mesh sieve to obtain surface-modified glass fiber powder;
2) adding 8 parts by weight of surface-modified glass fiber powder and 13 parts by weight of polyethylene glycol terephthalate into a dispersion machine, uniformly mixing, and blending and extruding through a double-screw extruder, wherein the temperature of the double-screw extruder is set to 250-260 ℃, and the glass fiber reinforced PET is obtained after extrusion, granulation and cooling;
3) uniformly mixing polycarbonate, glass fiber reinforced PET, polyethylene terephthalate, a flame retardant, an antioxidant and a light stabilizer according to the weight parts shown in Table 1, blending and extruding through a double-screw extruder, setting the temperature of the double-screw extruder at 260 ℃ and 270 ℃, and performing extrusion granulation and cooling to obtain the composition.
Example 4
The composition was prepared as follows
Adding 40 parts by weight of paraffin into 50 parts by weight of diethyl ether, heating until the paraffin is completely melted in the diethyl ether, adding glacial acetic acid to adjust the pH value of the solution to 5, adding 1.8 parts by weight of coupling agent (titanate 101 and silane coupling agent KH-602 are compounded according to the weight ratio of 1: 1), uniformly stirring, slowly adding 25 parts by weight of glass fiber powder (800 meshes) at the adding speed of 100g/min, carrying out suction filtration at 60 ℃ to remove the diethyl ether, stirring for 2.5 hours at 70 ℃, then grinding in a high-speed grinder, and sieving with a 200-mesh sieve to obtain surface-modified glass fiber powder;
2) adding 10 parts by weight of surface-modified glass fiber powder and 10 parts by weight of polyethylene glycol terephthalate into a dispersion machine, uniformly mixing, and blending and extruding through a double-screw extruder, wherein the temperature of the double-screw extruder is set to 250-260 ℃, and the glass fiber reinforced PET is obtained after extrusion, granulation and cooling;
3) uniformly mixing polycarbonate, glass fiber reinforced PET, polyethylene terephthalate, a flame retardant, an antioxidant and a light stabilizer according to the weight parts shown in Table 1, blending and extruding through a double-screw extruder, setting the temperature of the double-screw extruder at 260 ℃ and 270 ℃, and performing extrusion granulation and cooling to obtain the composition.
Example 5
The composition was prepared as follows
1) 25 parts of paraffin and 1.8 parts of coupling agent (titanate 101 and silane coupling agent KH-602 in a weight ratio of 1: 1 compounding), 36 parts by weight of glass fiber powder (800 meshes) and 62.8 parts by weight of polyethylene glycol terephthalate are added into a dispersion machine to be uniformly mixed, and are blended and extruded by a double-screw extruder, the temperature of the double-screw extruder is set to 250-260 ℃, and the glass fiber reinforced PET is obtained after extrusion granulation and cooling;
2) the polycarbonate, the glass fiber reinforced PET, the polyethylene terephthalate, the flame retardant, the antioxidant and the light stabilizer are uniformly mixed according to the weight parts shown in the table 1, and are blended and extruded by a double-screw extruder, the temperature of the double-screw extruder is set to be 260-plus-one 270 ℃, and the composition is obtained by extrusion, granulation and cooling.
Example 6
The composition was prepared as follows
1) 1.8 parts by weight of coupling agent (titanate 101 and silane coupling agent KH-602 in a weight ratio of 1: 1 compounding), 36 parts by weight of glass fiber powder (800 meshes) and 37.8 parts by weight of polyethylene glycol terephthalate are added into a dispersion machine to be uniformly mixed, and are blended and extruded by a double-screw extruder, the temperature of the double-screw extruder is set to 250-260 ℃, and the glass fiber reinforced PET is obtained after extrusion granulation and cooling;
2) the polycarbonate, the glass fiber reinforced PET, the polyethylene terephthalate, the flame retardant, the antioxidant and the light stabilizer are uniformly mixed according to the weight parts shown in the table 1, and are blended and extruded by a double-screw extruder, the temperature of the double-screw extruder is set to be 260-plus-one 270 ℃, and the composition is obtained by extrusion, granulation and cooling.
Example 7
The composition was prepared as follows
Adding 25 parts by weight of paraffin into 50 parts by weight of diethyl ether, heating until the paraffin is completely melted in the diethyl ether, adding glacial acetic acid to adjust the pH value of the solution to 5, adding 1.8 parts by weight of coupling agent (the titanate 101 and the silane coupling agent KH-602 are compounded according to the weight ratio of 1: 1), uniformly stirring, slowly adding 36 parts by weight of chopped glass fiber at the adding speed of 100g/min, carrying out suction filtration at 60 ℃ to remove the diethyl ether, stirring for 2.5 hours at 70 ℃, then grinding in a high-speed grinder, and sieving with a 200-mesh sieve to obtain the surface-modified chopped glass fiber;
2) adding 10 parts by weight of surface-modified chopped glass fiber and 10 parts by weight of polyethylene glycol terephthalate into a dispersion machine, uniformly mixing, and blending and extruding through a double-screw extruder, wherein the temperature of the double-screw extruder is set to 250-260 ℃, and the glass fiber reinforced PET is obtained after extrusion, granulation and cooling;
3) uniformly mixing polycarbonate, glass fiber reinforced PET, polyethylene terephthalate, a flame retardant, an antioxidant and a light stabilizer according to the weight parts shown in Table 1, blending and extruding through a double-screw extruder, setting the temperature of the double-screw extruder at 260 ℃ and 270 ℃, and performing extrusion granulation and cooling to obtain the composition.
Example 8
The composition was prepared as follows
Adding 25 parts by weight of paraffin into 50 parts by weight of diethyl ether, heating until the paraffin is completely melted in the diethyl ether, adding glacial acetic acid to adjust the pH value of the solution to 5, adding 1.8 parts by weight of coupling agent (titanate 101), uniformly stirring, slowly adding 36 parts by weight of glass fiber powder (800 meshes), wherein the adding speed is 100g/min, carrying out suction filtration at 60 ℃ to remove the diethyl ether, stirring for 2.5 hours at 70 ℃, then grinding in a high-speed grinder, and sieving with a 200-mesh sieve to obtain surface-modified glass fiber powder;
2) adding 10 parts by weight of surface-modified glass fiber powder and 10 parts by weight of polyethylene glycol terephthalate into a dispersion machine, uniformly mixing, and blending and extruding through a double-screw extruder, wherein the temperature of the double-screw extruder is set to 250-260 ℃, and the glass fiber reinforced PET is obtained after extrusion, granulation and cooling;
3) uniformly mixing polycarbonate, glass fiber reinforced PET, polyethylene terephthalate, a flame retardant, an antioxidant and a light stabilizer according to the weight parts shown in Table 1, blending and extruding through a double-screw extruder, setting the temperature of the double-screw extruder at 260 ℃ and 270 ℃, and performing extrusion granulation and cooling to obtain the composition.
Example 9
The composition was prepared as follows
Adding 25 parts by weight of paraffin into 50 parts by weight of diethyl ether, heating until the paraffin is completely melted in the diethyl ether, adding glacial acetic acid to adjust the pH value of the solution to 5, adding 1.8 parts by weight of coupling agent (silane coupling agent KH-602), uniformly stirring, slowly adding 36 parts by weight of glass fiber powder (800 meshes), wherein the adding speed is 100g/min, carrying out suction filtration at 60 ℃ to remove the diethyl ether, stirring at 70 ℃ for 2.5 hours, then grinding in a high-speed grinder, and sieving with a 200-mesh sieve to obtain surface-modified glass fiber powder;
2) adding 10 parts by weight of surface-modified glass fiber powder and 10 parts by weight of polyethylene glycol terephthalate into a dispersion machine, uniformly mixing, and blending and extruding through a double-screw extruder, wherein the temperature of the double-screw extruder is set to 250-260 ℃, and the glass fiber reinforced PET is obtained after extrusion, granulation and cooling;
3) uniformly mixing polycarbonate, glass fiber reinforced PET, polyethylene terephthalate, a flame retardant, an antioxidant and a light stabilizer according to the weight parts shown in Table 1, blending and extruding through a double-screw extruder, setting the temperature of the double-screw extruder at 260 ℃ and 270 ℃, and performing extrusion granulation and cooling to obtain the composition.
Example 10
The composition was prepared as follows
Adding 25 parts by weight of paraffin into 50 parts by weight of diethyl ether, heating until the paraffin is completely melted in the diethyl ether, adding glacial acetic acid to adjust the pH value of the solution to 5, adding 1.8 parts by weight of coupling agent (titanate 101 and silane coupling agent KH-602 are compounded according to the weight ratio of 1: 1), uniformly stirring, slowly adding 36 parts by weight of glass fiber powder (500 meshes) at the adding speed of 100g/min, carrying out suction filtration at 60 ℃ to remove the diethyl ether, stirring for 2.5 hours at 70 ℃, then grinding in a high-speed grinder, and sieving with a 200-mesh sieve to obtain surface-modified glass fiber powder;
2) adding 10 parts by weight of surface-modified glass fiber powder and 10 parts by weight of polyethylene glycol terephthalate into a dispersion machine, uniformly mixing, and blending and extruding through a double-screw extruder, wherein the temperature of the double-screw extruder is set to 250-260 ℃, and the glass fiber reinforced PET is obtained after extrusion, granulation and cooling;
3) uniformly mixing polycarbonate, glass fiber reinforced PET, polyethylene terephthalate, a flame retardant, an antioxidant and a light stabilizer according to the weight parts shown in Table 1, blending and extruding through a double-screw extruder, setting the temperature of the double-screw extruder at 260 ℃ and 270 ℃, and performing extrusion granulation and cooling to obtain the composition.
Example 11
The composition was prepared as follows
Adding 25 parts by weight of paraffin into 50 parts by weight of diethyl ether, heating until the paraffin is completely melted in the diethyl ether, adding glacial acetic acid to adjust the pH value of the solution to 5, adding 1.8 parts by weight of coupling agent (titanate 101 and silane coupling agent KH-602 are compounded according to the weight ratio of 1: 1), uniformly stirring, slowly adding 36 parts by weight of glass fiber powder (1200 meshes) at the adding speed of 100g/min, carrying out suction filtration at 60 ℃ to remove the diethyl ether, stirring for 2.5 hours at 70 ℃, then grinding in a high-speed grinder, and sieving with a 200-mesh sieve to obtain surface-modified glass fiber powder;
2) adding 10 parts by weight of surface-modified glass fiber powder and 10 parts by weight of polyethylene glycol terephthalate into a dispersion machine, uniformly mixing, and blending and extruding through a double-screw extruder, wherein the temperature of the double-screw extruder is set to 250-260 ℃, and the glass fiber reinforced PET is obtained after extrusion, granulation and cooling;
3) uniformly mixing polycarbonate, glass fiber reinforced PET, polyethylene terephthalate, a flame retardant, an antioxidant and a light stabilizer according to the weight parts shown in Table 1, blending and extruding through a double-screw extruder, setting the temperature of the double-screw extruder at 260 ℃ and 270 ℃, and performing extrusion granulation and cooling to obtain the composition.
Table 1 examples formulations table (units are parts by weight)
The compositions prepared in examples 1-11 were subjected to the following performance tests, and the test results are set forth in Table 2:
description of Performance test methods
The tensile strength was tested according to GB/T1040-2006 with a drawing speed of 5mm/s and a temperature of 23 ℃.
The bending strength is tested according to the GB/T9341-2008 standard; sample size (mm): (80. + -. 2) × (10. + -. 0.2) × (4. + -. 0.2), bending speed 20mm/min, temperature 23 ℃.
The notch impact strength is tested according to the GB/T1843-2008 standard; sample size (mm): (80. + -. 2) × (10. + -. 0.2) × (4. + -. 0.2), the radius of the bottom of the notch (mm) is 0.25. + -. 0.05, the thickness of the notch remaining (mm) is 8.0. + -. 0.2, the temperature is 23 ℃.
And (3) testing the frictional wear performance:
in the combined 3cm by 2cm by 0.5cm test specimens prepared by injection molding, the abrasion resistance was tested using a multifunctional friction and abrasion tester (model UMT-2, CETR, usa); the dual sample is steel 440-C, the rotating speed is 400r/min, the load is 100N, the experimental time is 1h, and the abrasion loss m1 is measured according to a weighing method.
And (3) testing the abrasion performance of the laser carving product:
the composition was injection molded into a 8cm by 10cm by 2cm test piece, and the test piece was subjected to abrasion resistance testing after laser engraving a 7cm by 9cm area difference at the center of one side of 8cm by 10cm by a laser marker of a laser engraving machine of model HK-20 of Wake laser technology (Shenzhen) Co., Ltd., depth of 15 mm. The abrasion resistance test was carried out by using a multifunctional friction abrasion tester (UMT-2 type, CETR Corp., USA); the dual sample is steel 440-C, the rotating speed is 400r/min, the load is 100N, the experimental time is 1h, and the abrasion loss m2 is measured according to a weighing method.
And (3) placing the radium carving product sample plate subjected to the friction and wear performance test in a salt spray corrosion test box for treatment, wherein the test is cyclically changed at the temperature of-20 ℃ to 120 ℃, the temperature change speed is 15 ℃/10min, and the mist reduction amount is 0.5mL/80cm × h, and the nozzle pressure is 100 kPa. Spraying an aqueous solution containing 5% of sodium chloride and 5% of HCl by a spraying device, taking out a sample after 10 days, standing for 24 hours at the temperature of 60 ℃, taking out and cooling to room temperature, and carrying out a friction and wear performance test on the sample plate again to measure the wear amount m 3.
TABLE 2 composition Performance test Table
The results show that when the addition amount of the paraffin exceeds a certain proportion, the mechanical property of the material is greatly reduced, and the wear resistance is not good.
In example 5, the paraffin, the coupling agent, the glass fiber and the PET are directly blended and extruded, and when the surface modification is not performed on the glass fiber, the polymer is not good in blending crosslinking, mechanical property and wear resistance.
In example 6, paraffin is not added, and the obtained composition has good mechanical properties, but the laser etched product has poor wear resistance.
Example 7 compares with example 1 and replaces the glass fiber powder with the chopped glass fiber, example 10, example 11 compares with example 1, its mesh number of glass fiber powder is different, example 7, example 10 and example 11 composition performance test result, prove in the composition of the invention, when the glass fiber chooses the 800 mesh-1000 mesh glass fiber, the composition mechanical property that gets is better, the abrasion resistance of the radium carving products is better.
The coupling agents of the embodiment 8 and the embodiment 9 adopt a single coupling agent, and performance test results show that the composite coupling agent has better effect.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A heat and low temperature resistant wear resistant composition comprising the following ingredients:
a polycarbonate;
glass fiber reinforced PET;
polyethylene terephthalate;
a flame retardant;
an antioxidant;
light stabilizers.
2. The heat and low temperature resistant abrasion resistant composition according to claim 1, comprising the following components in parts by weight:
39.9-52.6 parts by weight of polycarbonate;
35-47 parts of glass fiber reinforced PET;
10.5-12.3 parts by weight of polyethylene terephthalate;
0.2 to 0.3 weight portion of flame retardant;
0.2 to 0.3 weight portion of antioxidant;
0.2 to 0.3 part by weight of light stabilizer.
3. The heat and low temperature resistant abrasion resistant composition of claim 2, wherein:
the glass fiber reinforced PET is prepared by the following method:
adding 20-30 parts by weight of paraffin into 40-50 parts by weight of diethyl ether, heating until the paraffin is completely melted in the diethyl ether, adding glacial acetic acid to adjust the pH value of the solution to 5, adding 1.5-2 parts by weight of coupling agent, uniformly stirring, slowly adding 31-41 parts by weight of glass fiber powder at the adding speed of 100g/min, carrying out suction filtration at 60 ℃ to remove the diethyl ether, stirring for 2-3 hours at 70 ℃, then grinding in a high-speed grinder, and sieving with a 200-mesh sieve to obtain surface-modified glass fiber powder;
then adding 8-13 parts by weight of surface modified glass fiber powder and 8-13 parts by weight of polyethylene glycol terephthalate into a dispersion machine for uniform mixing, blending and extruding through a double-screw extruder, setting the temperature of the double-screw extruder at 250-260 ℃, and performing extrusion granulation and cooling to obtain the glass fiber reinforced PET.
4. The heat and low temperature resistant abrasion resistant composition of claim 3, wherein:
the specification of the glass fiber powder is 800-1000 meshes.
5. The heat and low temperature resistant abrasion resistant composition of claim 3, wherein:
the coupling agent is a titanate coupling agent or/and a silane coupling agent.
6. The heat and low temperature resistant abrasion resistant composition of claim 2, wherein:
the density of the polycarbonate is 1200KG/m3Tested according to standard ISO 1183.
7. The heat and low temperature resistant abrasion resistant composition of claim 2, wherein:
the flame retardant is selected from decabromodiphenylethane or melamine urate.
8. The heat and low temperature resistant abrasion resistant composition of claim 2, wherein:
the light stabilizer is hindered amine light stabilizer or benzoate ultraviolet absorber.
9. The heat and low temperature resistant abrasion resistant composition of claim 2, wherein:
the antioxidant is selected from one or more of pentaerythritol tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], dilauryl thiodipropionate and triphenyl phosphite.
10. A method of preparing a heat and low temperature resistant abrasion resistant composition as claimed in any one of claims 1 to 9, comprising the steps of:
uniformly mixing polycarbonate, glass fiber reinforced PET, polyethylene terephthalate, a flame retardant, an antioxidant and a light stabilizer in parts by weight, blending and extruding through a double-screw extruder, setting the temperature of the double-screw extruder at 260-270 ℃, and performing extrusion granulation and cooling to obtain the composition.
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