CN104845117A - Modified polyethylene terephthalate alloy and preparation method thereof - Google Patents

Abstract

The invention discloses a modified polyethylene terephthalate alloy and a preparation method thereof. The modified polyethylene terephthalate alloy provided by the invention comprises the following components by weight: 35% to 60% of PET, 20% to 35% of PTT, 2% to 4% of GMA-St-AN, 8% to 12% of glass fiber, 5% to 10% of polyolefin elastomer graft, 0.5% to 2% of a light stabilizer, 0.1% to 1% of a nucleating agent, 0.1% to 0.5% of an antioxidant, 0.1% to 1% of a lubricant and 0.1% to 1% of a sulphonate flame retardant, wherein the polyolefin elastomer graft is GMA-g-POE-g-MAH. The invention has the following beneficial effects: the modified polyethylene terephthalate alloy has the advantages of good comprehensive mechanical properties of notch impact strength, tensile strength and bending strength, good processing property, beautiful appearance, good flame-retardant effect and exellent aging resistance.

Description

A kind of modification polyethylene terephthalate Alloy And Preparation Method

Technical field

The present invention relates to technical field of polymer materials, specifically a kind of modification polyethylene terephthalate Alloy And Preparation Method.

Background technology

Polyethylene terephthalate (PET) a kind ofly has higher melt temperature and the crystalline polymer of second-order transition temperature, excellent physicals and mechanical property is kept in certain temperature range, its resistance to fatigue, rub resistance, ageing resistance, electrical insulating property feature are very outstanding, to most of organic solvent and acid more stable, production energy consumption is lower, is thus widely used in the fields such as synthon, film and engineering plastics; But because PET rigidity is comparatively forced toughness of material is poor, crystallization velocity is comparatively slow, the shortcomings such as the high and shaping cycle of forming mould temperature is long, greatly limit its range of application.Poly(Trimethylene Terephthalate) (PTT) is that a kind of crystallization velocity is fast, happy and harmonious temperature and the lower crystalline polymer of second-order transition temperature, there is excellent especially flexibility, elastic recovery, the stability feature of processing characteristics, electric property, mechanical property and size.By the polyblend of blended for PET and PTT preparation, performance can be learnt from other's strong points to offset one's weaknesses, make to remain PET, PTT advantage separately, and good practical value will be had in the fields such as automobile, electronic apparatus, household electrical appliances, fiber.

Summary of the invention

The object of the present invention is to provide a kind of modification polyethylene terephthalate Alloy And Preparation Method blended with PTT.

The technical solution adopted for the present invention to solve the technical problems is: a kind of modification polyethylene terephthalate alloy, and its component by mass percent proportioning is: PET 35% ~ 60%, PTT 20% ~ 35%, GMA-St-AN 2% ~ 4%, glass fibre 8% ~ 12%, polyolefin elastomer grafts 5% ~ 10%, photostabilizer 0.5% ~ 2%, nucleator 0.1% ~ 1%, oxidation inhibitor 0.1% ~ 0.5%, lubricant 0.1% ~ 1%, sulfonate salt flame 0.1% ~ 1%.

Described PET is polyethylene terephthalate.

Described PTT is Poly(Trimethylene Terephthalate).

Described GMA-St-AN is compatilizer glycidyl methacrylate-styrene-acrylonitrile terpolymer, and glycidyl methacrylate accounts for 1 wt% ~ 5 wt %, vinyl cyanide accounts for 27 wt % ~ 30 wt %.

Described glass fibre be surface through silane coupler modified process and mean length 50 ~ 200 μm, mean diameter is at 5 ~ 25 μm and the alkali free glass fibre of length-to-diameter ratio in 10 ~ 30 scopes.

Described polyolefin elastomer grafts is maleic anhydride, glycidyl methacrylate dual graft polyolefin elastomer multipolymer GMA-g-POE-g-MAH.

Described photostabilizer is the compound of hindered amines high molecular photostabilizer GW-944Z and the GW-622 of mass ratio 1:1.

Described nucleator is the one in nano silicon, sodium bicarbonate, Sodium Benzoate.

Described oxidation inhibitor is the Hinered phenols antioxidant 1010 or 1076 of mass ratio 1:1 and the compound of phosphite ester kind antioxidant 168.

Described lubricant is modification ethylene bis-fatty acid amides TAF.

Described sulfonate salt flame is perfluorobutyl potassium.

The preparation method of above-mentioned a kind of modification polyethylene terephthalate alloy, comprises the following steps:

(1), by PET and PTT in forced air circulation baking oven at 110 DEG C ~ 120 DEG C temperature dry 6 ~ 8 hours, stand-by;

(2) polyolefin elastomer grafts, is prepared: by 2wt% maleic anhydride MAH, 5wt% glycidyl methacrylate GMA, 0.5wt% dibenzoyl peroxide and 92.5wt% polyolefin elastomer, add in super mixer, stir 20 ~ 40 minutes at 50 DEG C ~ 80 DEG C temperature, then discharging, add in twin screw extruder, graft reaction is carried out and extruding pelletization under extrusion temperature 160 DEG C ~ 180 DEG C, rate of feeding 25 ~ 45r/min, screw speed 80 ~ 100r/min, obtain described polyolefin elastomer grafts, stand-by;

(3), taking dry PTT by weight ratio adds in super mixer, add photostabilizer, oxidation inhibitor, lubricant, sulfonate salt flame by weight ratio simultaneously, and add the obtained polyolefin elastomer grafts of step (2) by weight ratio, make to be mixed together 3 ~ 15 minutes, after fully mixing, discharging add twin screw extruder melt extrude pelletizing and dry after stand-by;

(4), taking dry PET by weight ratio adds in super mixer, add the product that step (3) obtains again, and add described GMA-St-AN and nucleator by weight ratio, make to be mixed together 3 ~ 15 minutes, after fully mixing, discharging adds the main spout of twin screw extruder, add described glass fibre by weight ratio from the side spout of twin screw extruder simultaneously, by twin screw extruder melting mixing 1 ~ 2 minute, screw speed controls at 150 ~ 500r/min, processing temperature is 190 DEG C ~ 260 DEG C scopes, then extruding pelletization, obtain a kind of modification polyethylene terephthalate alloy of the present invention.

The invention has the beneficial effects as follows, the present invention has the comprehensive mechanical property of good notched Izod impact strength, tensile strength, flexural strength, and processibility is good, good looking appearance, and good flame retardation effect, ageing-resistant performance is excellent.

Embodiment

Technical scheme of the present invention is further illustrated below in conjunction with specific embodiment.

Embodiment 1:

A kind of modification polyethylene terephthalate alloy, its component by mass percent proportioning is: PET 60%, PTT 20%, GMA-St-AN 3%, glass fibre 8%, GMA-g-POE-g-MAH 5%, photostabilizer 2%, nano silicon 1%, oxidation inhibitor 0.2%, TAF 0.7%, perfluorobutyl potassium 0.1%, described glass fibre is that surface is through silane coupler modified process, and mean length is at 50 ~ 200 μm, mean diameter is at 5 ~ 25 μm and the alkali free glass fibre of length-to-diameter ratio in 10 ~ 30 scopes, described photostabilizer is the compound of hindered amines high molecular photostabilizer GW-944Z and the GW-622 of mass ratio 1:1, described oxidation inhibitor is the Hinered phenols antioxidant 1010 of mass ratio 1:1 and the compound of phosphite ester kind antioxidant 168.

Preparation method: (1), by PET and PTT in forced air circulation baking oven at 110 DEG C ~ 120 DEG C temperature dry 6 ~ 8 hours, stand-by, (2), GMA-g-POE-g-MAH is prepared: by 2wt% maleic anhydride MAH, 5wt% glycidyl methacrylate GMA, 0.5wt% dibenzoyl peroxide and 92.5wt% polyolefin elastomer, add in super mixer, stir 20 ~ 40 minutes at 50 DEG C ~ 80 DEG C temperature, then discharging, add in twin screw extruder, graft reaction is carried out and extruding pelletization under extrusion temperature 160 DEG C ~ 180 DEG C, rate of feeding 25 ~ 45r/min, screw speed 80 ~ 100r/min, obtain described GMA-g-POE-g-MAH, stand-by, (3), taking dry PTT by weight ratio adds in super mixer, add photostabilizer, oxidation inhibitor, TAF, perfluorobutyl potassium by weight ratio simultaneously, and add the obtained polyolefin elastomer grafts of step (2) by weight ratio, make to be mixed together 3 ~ 15 minutes, after fully mixing, discharging add twin screw extruder melt extrude pelletizing and dry after stand-by, (4), taking dry PET by weight ratio adds in super mixer, add the product that step (3) obtains again, and add described GMA-St-AN and nano silicon by weight ratio, make to be mixed together 3 ~ 15 minutes, after fully mixing, discharging adds the main spout of twin screw extruder, add described glass fibre by weight ratio from the side spout of twin screw extruder simultaneously, by twin screw extruder melting mixing 1 ~ 2 minute, screw speed controls at 150 ~ 500r/min, processing temperature is 190 DEG C ~ 260 DEG C scopes, then extruding pelletization, obtain a kind of modification polyethylene terephthalate alloy of the present invention.

Embodiment 2:

A kind of modification polyethylene terephthalate alloy, its component by mass percent proportioning is: PET 35%, PTT 35%, GMA-St-AN 4%, glass fibre 12%, GMA-g-POE-g-MAH 10%, photostabilizer 2%, Sodium Benzoate 1%, oxidation inhibitor 0.1%, TAF 0.8%, perfluorobutyl potassium 0.1%, described glass fibre is that surface is through silane coupler modified process, and mean length is at 50 ~ 200 μm, mean diameter is at 5 ~ 25 μm and the alkali free glass fibre of length-to-diameter ratio in 10 ~ 30 scopes, described photostabilizer is the compound of hindered amines high molecular photostabilizer GW-944Z and the GW-622 of mass ratio 1:1, described oxidation inhibitor is the Hinered phenols antioxidant 1076 of mass ratio 1:1 and the compound of phosphite ester kind antioxidant 168.

Preparation method: (1), by PET and PTT in forced air circulation baking oven at 110 DEG C ~ 120 DEG C temperature dry 6 ~ 8 hours, stand-by, (2), GMA-g-POE-g-MAH is prepared: by 2wt% maleic anhydride MAH, 5wt% glycidyl methacrylate GMA, 0.5wt% dibenzoyl peroxide and 92.5wt% polyolefin elastomer, add in super mixer, stir 20 ~ 40 minutes at 50 DEG C ~ 80 DEG C temperature, then discharging, add in twin screw extruder, graft reaction is carried out and extruding pelletization under extrusion temperature 160 DEG C ~ 180 DEG C, rate of feeding 25 ~ 45r/min, screw speed 80 ~ 100r/min, obtain described GMA-g-POE-g-MAH, stand-by, (3), taking dry PTT by weight ratio adds in super mixer, add photostabilizer, oxidation inhibitor, TAF, perfluorobutyl potassium by weight ratio simultaneously, and add the obtained polyolefin elastomer grafts of step (2) by weight ratio, make to be mixed together 3 ~ 15 minutes, after fully mixing, discharging add twin screw extruder melt extrude pelletizing and dry after stand-by, (4), taking dry PET by weight ratio adds in super mixer, add the product that step (3) obtains again, and add described GMA-St-AN and Sodium Benzoate by weight ratio, make to be mixed together 3 ~ 15 minutes, after fully mixing, discharging adds the main spout of twin screw extruder, add described glass fibre by weight ratio from the side spout of twin screw extruder simultaneously, by twin screw extruder melting mixing 1 ~ 2 minute, screw speed controls at 150 ~ 500r/min, processing temperature is 190 DEG C ~ 260 DEG C scopes, then extruding pelletization, obtain a kind of modification polyethylene terephthalate alloy of the present invention.

Claims (9)

1. a modification polyethylene terephthalate alloy, it is characterized in that, its component by mass percent proportioning is: PET 35% ~ 60%, PTT 20% ~ 35%, GMA-St-AN 2% ~ 4%, glass fibre 8% ~ 12%, polyolefin elastomer grafts 5% ~ 10%, photostabilizer 0.5% ~ 2%, nucleator 0.1% ~ 1%, oxidation inhibitor 0.1% ~ 0.5%, lubricant 0.1% ~ 1%, sulfonate salt flame 0.1% ~ 1%.

2. a kind of modification polyethylene terephthalate alloy according to claim 1, it is characterized in that, described glass fibre be surface through silane coupler modified process and mean length 50 ~ 200 μm, mean diameter is at 5 ~ 25 μm and the alkali free glass fibre of length-to-diameter ratio in 10 ~ 30 scopes.

3. a kind of modification polyethylene terephthalate alloy according to claim 1, is characterized in that, described polyolefin elastomer grafts is maleic anhydride, glycidyl methacrylate dual graft polyolefin elastomer multipolymer.

4. a kind of modification polyethylene terephthalate alloy according to claim 1, is characterized in that, described photostabilizer is the compound of hindered amines high molecular photostabilizer GW-944Z and the GW-622 of mass ratio 1:1.

5. a kind of modification polyethylene terephthalate alloy according to claim 1, it is characterized in that, described nucleator is the one in nano silicon, sodium bicarbonate, Sodium Benzoate.

6. a kind of modification polyethylene terephthalate alloy according to claim 1, is characterized in that, described oxidation inhibitor is the Hinered phenols antioxidant 1010 or 1076 of mass ratio 1:1 and the compound of phosphite ester kind antioxidant 168.

7. a kind of modification polyethylene terephthalate alloy according to claim 1, is characterized in that, described lubricant is modification ethylene bis-fatty acid amides.

8. a kind of modification polyethylene terephthalate alloy according to claim 1, it is characterized in that, described sulfonate salt flame is perfluorobutyl potassium.

9. the preparation method of a kind of modification polyethylene terephthalate alloy according to claim 1, is characterized in that, comprise the following steps:

(1), by PET and PTT in forced air circulation baking oven at 110 DEG C ~ 120 DEG C temperature dry 6 ~ 8 hours, stand-by;

(2) polyolefin elastomer grafts, is prepared: by 2wt% maleic anhydride MAH, 5wt% glycidyl methacrylate GMA, 0.5wt% dibenzoyl peroxide and 92.5wt% polyolefin elastomer, add in super mixer, stir 20 ~ 40 minutes at 50 DEG C ~ 80 DEG C temperature, then discharging, add in twin screw extruder, graft reaction is carried out and extruding pelletization under extrusion temperature 160 DEG C ~ 180 DEG C, rate of feeding 25 ~ 45r/min, screw speed 80 ~ 100r/min, obtain described polyolefin elastomer grafts, stand-by;

(3), taking dry PTT by weight ratio adds in super mixer, add photostabilizer, oxidation inhibitor, lubricant, sulfonate salt flame by weight ratio simultaneously, and add the obtained polyolefin elastomer grafts of step (2) by weight ratio, make to be mixed together 3 ~ 15 minutes, after fully mixing, discharging add twin screw extruder melt extrude pelletizing and dry after stand-by;

(4), taking dry PET by weight ratio adds in super mixer, add the product that step (3) obtains again, and add described GMA-St-AN and nucleator by weight ratio, make to be mixed together 3 ~ 15 minutes, after fully mixing, discharging adds the main spout of twin screw extruder, add described glass fibre by weight ratio from the side spout of twin screw extruder simultaneously, by twin screw extruder melting mixing 1 ~ 2 minute, screw speed controls at 150 ~ 500r/min, processing temperature is 190 DEG C ~ 260 DEG C scopes, then extruding pelletization, obtain a kind of modification polyethylene terephthalate alloy of the present invention.