CN103881345A - PC-PBT alloy material and preparation method thereof - Google Patents

Abstract

The invention discloses a PC-PBT alloy material and a preparation method thereof. The PC-PBT alloy material comprises, by mass, 30 to 70% of PC, 30 to 70% of PBT, 0.5 to 2% of triphenyl phosphite, 0.5 to 2% of a compatilizer, 0.5 to 2% of a lubricating dispersant and 0.1 to 1% of an anti-oxidant. The invention has the following beneficial effects: compared with the prior art, the PC-PBT alloy material provided by the invention inherits respective advantages of PC and PBT and has excellent comprehensive performance; addition of the compatibilizer enables PC and PBT to have good compatibility during blending, so the impact strength and elongation at break of the PC-PBT alloy material are greatly improved; since the addition amount of the compatibilizer is small, the original mechanical properties of the material are maintained. The invention brings forward a preparation method for the PC-PBT alloy material; and the preparation method has the advantages of simple process, convenient operation and low cost.

Description

A kind of PC and PBT alloy material and preparation method thereof

Technical field

The present invention relates to technical field of polymer materials, specifically a kind of PC and PBT alloy material and preparation method thereof.

Background technology

Polycarbonate (PC) and polybutylene terephthalate (PBT) all belong to general engineering plastic.PC excellent performance, especially shock strength is high, rank first, and creep resistant is good in engineering plastics, and second-order transition temperature is high, can in the scope of 120 DEG C～130 DEG C, use continuously, has good electrical insulating property and dimensional stability.But the melt viscosity of PC is large, poor fluidity, poor solvent resistance, wears no resistance.PBT is a kind of crystallization velocity thermoplastic engineering plastic faster, has excellent solvent resistance, and fluidity of molten is good, but the second-order transition temperature of PBT is low, high temperature rigid deficiency, and notch sensitivity is large.Therefore, PC and PBT are carried out to blending and modifying, can overcome PBT poor heat resistance, shock-resistance is low, notched Izod impact strength is not high shortcoming, made up the deficiency of PC chemical proofing, forming process and wear resistance simultaneously, there is good practical prospect.

Because PC is non-crystalline polymer, PBT is crystalline polymer, and therefore, PC and PBT blend belong to typical noncrystalline and crystalline polymer co-mixing system, and its interfacial bond is bad, and shock strength is low.

Summary of the invention

The object of the present invention is to provide that a kind of consistency is good, the PC of good mechanical performance and PBT alloy material and preparation method thereof.

The technical solution adopted for the present invention to solve the technical problems is: a kind of PC and PBT alloy material, its component by mass percent proportioning is: PC 30%～70%, PBT 30%～70%, triphenyl phosphite 0.5%～2%, expanding material 0.5%～2%, lubrication dispersing agent 0.5%～2%, oxidation inhibitor 0.1%～1%.

Described PC is polycarbonate.

Described PBT is polybutylene terephthalate.

Described expanding material is ethylene-methyl acrylate-glyceryl methacrylate terpolymer (E-MA-GMA) or ethylene-propylene acetoacetic ester-glycidyl methacrylate copolymer (E-EA-GMA).

Described lubrication dispersing agent is the one in low molecular polyethylene, EVA wax, OP wax, TAS-2A, ethylene bis stearic acid amide (EBS).

Described oxidation inhibitor is the compound of Hinered phenols antioxidant 1076 and phosphite ester kind antioxidant 168.

Above-mentioned a kind of PC and the preparation method of PBT alloy material, comprise the following steps:

(1) PC is dried to 3～4 hours at 120 DEG C～130 DEG C, moisture control is below 0.02%, stand-by;

(2) PBT is dried to 3～4 hours at 130 DEG C～150 DEG C, moisture control is below 0.03%, stand-by;

(3) PC and the PBT that take by weight ratio after drying treatment add high-speed mixer, mix, then add the triphenyl phosphite, expanding material, lubrication dispersing agent and the oxidation inhibitor that take by weight ratio, make fully to mix together 10～30 minutes;

(4) the more above-mentioned material mixing is added to the abundant melt blending of twin screw extruder, melt temperature is controlled at 210 DEG C～255 DEG C, screw speed is 300～600 revs/min, shearing by twin screw extruder, mixing, extrude, then carry out cooling, air-dry, pelletizing, be drying to obtain a kind of PC of the present invention and PBT alloy material.

It is to suppress the generation of the transesterification reaction between PC and PBT that the present invention adds the object of triphenyl phosphite.

The invention has the beneficial effects as follows, compared with prior art, a kind of PC of the present invention and PBT alloy material have not only had both PC and PBT advantage separately, there is good over-all properties, and make the consistency of PC and PBT blend good adding of expanding material, greatly improve shock strength and the elongation at break of PC and PBT alloy material, again because expanding material addition is fewer, kept well original mechanical property of material.A kind of PC that the present invention proposes and the preparation technology of PBT alloy material are simple, easy to operate, and cost is low.

Embodiment

Further illustrate technical scheme of the present invention below in conjunction with specific embodiment.

Embodiment 1:

A kind of PC and PBT alloy material, its component by mass percent proportioning is: the compound 0.5% of PC 48%, PBT 48%, triphenyl phosphite 1%, ethylene-methyl acrylate-glyceryl methacrylate terpolymer (E-MA-GMA) 1%, EVA wax 1.5%, Hinered phenols antioxidant 1076 and phosphite ester kind antioxidant 168.

Preparation method: (1) is dried 3～4 hours by PC at 120 DEG C～130 DEG C, and moisture control is below 0.02%, stand-by; (2) PBT is dried to 3～4 hours at 130 DEG C～150 DEG C, moisture control is below 0.03%, stand-by; (3) PC and the PBT that take by weight ratio after drying treatment add high-speed mixer, mix, the compound that adds again the triphenyl phosphite, ethylene-methyl acrylate-glyceryl methacrylate terpolymer (E-MA-GMA), EVA wax and Hinered phenols antioxidant 1076 and the phosphite ester kind antioxidant 168 that take by weight ratio, makes fully to mix together 10～30 minutes; (4) the more above-mentioned material mixing is added to the abundant melt blending of twin screw extruder, melt temperature is controlled at 210 DEG C～255 DEG C, screw speed is 300～600 revs/min, shearing by twin screw extruder, mixing, extrude, then carry out cooling, air-dry, pelletizing, be drying to obtain a kind of PC of the present invention and PBT alloy material.

Embodiment 2:

A kind of PC and PBT alloy material, its component by mass percent proportioning is: the compound 0.5% of PC 68%, PBT 29%, triphenyl phosphite 0.5%, ethylene-propylene acetoacetic ester-glycidyl methacrylate copolymer (E-EA-GMA) 1%, ethylene bis stearic acid amide (EBS) 1%, Hinered phenols antioxidant 1076 and phosphite ester kind antioxidant 168.

Preparation method: (1) is dried 3～4 hours by PC at 120 DEG C～130 DEG C, and moisture control is below 0.02%, stand-by; (2) PBT is dried to 3～4 hours at 130 DEG C～150 DEG C, moisture control is below 0.03%, stand-by; (3) PC and the PBT that take by weight ratio after drying treatment add high-speed mixer, mix, the compound that adds again the triphenyl phosphite, ethylene-propylene acetoacetic ester-glycidyl methacrylate copolymer (E-EA-GMA), ethylene bis stearic acid amide (EBS) and Hinered phenols antioxidant 1076 and the phosphite ester kind antioxidant 168 that take by weight ratio, makes fully to mix together 10～30 minutes; (4) the more above-mentioned material mixing is added to the abundant melt blending of twin screw extruder, melt temperature is controlled at 210 DEG C～255 DEG C, screw speed is 300～600 revs/min, shearing by twin screw extruder, mixing, extrude, then carry out cooling, air-dry, pelletizing, be drying to obtain a kind of PC of the present invention and PBT alloy material.

Claims (5)

1. a PC and PBT alloy material, it is characterized in that, its component by mass percent proportioning is: PC 30%～70%, PBT 30%～70%, triphenyl phosphite 0.5%～2%, expanding material 0.5%～2%, lubrication dispersing agent 0.5%～2%, oxidation inhibitor 0.1%～1%.

2. a kind of PC according to claim 1 and PBT alloy material, it is characterized in that, described expanding material is ethylene-methyl acrylate-glyceryl methacrylate terpolymer (E-MA-GMA) or ethylene-propylene acetoacetic ester-glycidyl methacrylate copolymer (E-EA-GMA).

3. a kind of PC according to claim 1 and PBT alloy material, is characterized in that, described lubrication dispersing agent is the one in low molecular polyethylene, EVA wax, OP wax, TAS-2A, ethylene bis stearic acid amide (EBS).

4. a kind of PC according to claim 1 and PBT alloy material, is characterized in that, described oxidation inhibitor is the compound of Hinered phenols antioxidant 1076 and phosphite ester kind antioxidant 168.

5. the preparation method of a kind of PC according to claim 1 and PBT alloy material, is characterized in that, comprises the following steps:

(1) PC is dried to 3～4 hours at 120 DEG C～130 DEG C, moisture control is below 0.02%, stand-by;

(2) PBT is dried to 3～4 hours at 130 DEG C～150 DEG C, moisture control is below 0.03%, stand-by;

(3) PC and the PBT that take by weight ratio after drying treatment add high-speed mixer, mix, then add the triphenyl phosphite, expanding material, lubrication dispersing agent and the oxidation inhibitor that take by weight ratio, make fully to mix together 10～30 minutes;

(4) the more above-mentioned material mixing is added to the abundant melt blending of twin screw extruder, melt temperature is controlled at 210 DEG C～255 DEG C, screw speed is 300～600 revs/min, shearing by twin screw extruder, mixing, extrude, then carry out cooling, air-dry, pelletizing, be drying to obtain a kind of PC of the present invention and PBT alloy material.