CN104974481A - PET toughened plastic and preparation method thereof - Google Patents

Abstract

The invention discloses a PET toughened plastic and a preparation method thereof. The PET toughened plastic comprises the following raw materials: PET, montmorillonite, EPDM, ethylene, glycidyl methacrylate, MBS, CPE, POE, silica and magnesium oxide. The PET toughened plastic has friction coefficient of 0.1 to 0.3, minimum wear scar width, lateral shrinkage of 0.9 to 1.3%, vertical shrinkage of 0.7 to 1.1%, a shrinkage ratio of 0.8 to 1.2, thermal deformation temperature of 240 to 280 DEG C, tensile strength of 45 to 85 MPa, impact strength of 30 to 70 kJ/m2, elongation at break of 450 to 650%, bending strength of 20 to 60 MPa, Young modulus of 5.5 to 7.5 GPa and Shore hardness of 60 to 65 D.

Description

A kind of PET toughened plastics and preparation method thereof

Technical field

The present invention relates to plastics arts, particularly relate to a kind of PET toughened plastics and preparation method thereof.

Background technology

Plastic pellet is being commonly called as of plastic grain, and to be plastics carry out storing with work in-process form, transport and the raw material of machine-shaping.Plastics are family macromolecule materials, are that raw material can obtain ethene, propylene, vinylchlorid, vinylbenzene etc. with oil, and the molecule of these materials can react to each other under certain condition and generate the very large compound of molecular weight, i.e. polymer.

The most outstanding character of polypropylene is versatility, and it can be suitable for many working methods and purposes.Its value and versatility mainly from excellent chemical resistance, in the thermoplastics of ancestor in minimum density and the highest fusing point, moderate cost.

Plastics are derivatives of oil, and the market value of plastics depends on the equilibrium of supply and demand in market.The plastics market of China has plastics material of an established trade mark, secondary board material, and reprocessed plastic(s) are formed, and international turn of the market is not very large on domestic impact, and much cheap plastic waste is come from external import, has delayed the impact of International Crude Oil variation on China market.But the ups and downs of international oil price are certainly influential, and plastic waste price is also in ups and downs.

Polyethylene, polypropylene, polyvinyl chloride, polystyrene, our normally used plastics are exactly by above-mentioned four kinds of molecular materials of high score (polyethylene, sound embrittlement during polypropylene film shake; Polyvinyl chloride film is then more soft, without embrittlement sound during shake; Expanded plastic is generally polystyrene, has dense smoke during burning).Begin from the sixties in last century, plastics enter the extensive practical stage, because plastics have lot of advantages: it draws materials easily, cheap, easy to process, quality is light and handy, and therefore plastics one come out, just deeply welcome by the world, it penetrates into different social sectors rapidly, and plastics are made into bowl, cup, bag, basin, bucket, pipe etc., and plastics are listed in one of 20th century greatest invention, the universal of plastics is described as White Revolution.Along with plastics output constantly increases, cost is more and more lower, a large amount of agricultural films that we used, and wrapping plastics bag and disposable plastic tableware are abandoned after a procedure in the environment, are brought very havoc to view and environment.Because plastic packing article is mostly in white, the environmental pollution that they cause is called as white pollution.

Glass fiber reinforcement PET is applicable to electric and automobile industry, for various coil rack, transformer, televisor, sound-track engraving apparatus component and shell, Automobile lamp holder, lampshade, white heat lamp socket, rly., seletron etc.The consumption ratio of the current several Application Areas of PET engineering plastics is: electric appliance and electronic 26%, automobile 22%, and machinery 19%, apparatus 10%, the consumer's goods 10%, other are 13%.The total flow of current PET engineering plastics is also little, only accounts for 1.6% of PET total amount.

PET molecular structure high degree of symmetry, has certain crystalline orientation ability, so have higher film-forming properties and become second nature.PET has good optical property and weathering resistance, and amorphous PET has good optical transparence.PET has excellent abrasion performance frictional property and dimensional stability and electrical insulating property in addition.The bottle that PET makes has that intensity is large, the transparency is good, nontoxic, impermeable, quality is light, high thus the receiving of production efficiency is applied widely.PBT and PET molecular chain structure is similar, and most of character is also the same, and just molecular backbone chain becomes four by two methylene radical, so molecule is submissiveer, processing characteristics is more excellent.

Summary of the invention

The invention provides that a kind of tensile strength is high, flexural strength is high, shock strength is high and PET toughened plastics that elongation at break is high and preparation method thereof, solve the technical problems such as the low and flexural strength of existing plastic pellet tensile strength is low.

The present invention is by the following technical solutions: a kind of PET toughened plastics, it is as follows that mass fraction proportioning pressed by its raw material: PET100 part, polynite 1-5 part, EPDM5-25 part, ethene 10-30 part, glycidyl methacrylate 1-20 part, MBS1-5 part, CPE5-25 part, POE5-25 part, silica 1-5 parts, magnesium oxide 2.5-4.5 part.

As a preferred technical solution of the present invention: it is as follows that mass fraction proportioning pressed by the raw material of described PET toughened plastics: PET100 part, polynite 2 parts, EPDM10 part, ethene 15 parts, glycidyl methacrylate 5 parts, MBS2 part, CPE10 part, POE10 part, silicon-dioxide 2 parts, 3 parts, magnesium oxide.

As a preferred technical solution of the present invention: it is as follows that mass fraction proportioning pressed by the raw material of described PET toughened plastics: PET100 part, polynite 4 parts, EPDM20 part, ethene 25 parts, glycidyl methacrylate 15 parts, MBS4 part, CPE20 part, POE20 part, silicon-dioxide 4 parts, 4 parts, magnesium oxide.

As a preferred technical solution of the present invention: it is as follows that mass fraction proportioning pressed by the raw material of described PET toughened plastics: PET100 part, polynite 3 parts, EPDM15 part, ethene 20 parts, glycidyl methacrylate 10 parts, MBS3 part, CPE15 part, POE15 part, silicon-dioxide 3 parts, 3.5 parts, magnesium oxide.

Prepare a method for described PET toughened plastics, step is:

The first step: take PET, polynite, EPDM, ethene, glycidyl methacrylate, MBS, CPE, POE, silicon-dioxide and magnesium oxide according to mass fraction proportioning;

Second step: polynite and POE are dropped in reactor and mix 30-50min, add PET, EPDM, ethene and MBS, be warming up to 65-85 DEG C, with 160-180r/min speed mixing 45-65min;

3rd step: add glycidyl methacrylate, CPE, POE, silicon-dioxide and magnesium oxide, mixes rear input twin screw extruder, extruding pelletization at being warming up to 220-240 DEG C.

beneficial effect

A kind of PET toughened plastics of the present invention and preparation method thereof adopts above technical scheme compared with prior art, there is following technique effect: 1, product frictional coefficient 0.1-0.3, wear scar width is minimum, lateral shrinkage 0.9-1.3%, longitudinal contraction rate 0.7-1.1%, contraction ratio 0.8-1.2, heat-drawn wire 240-280 DEG C; 2, tensile strength 45-85MPa, shock strength 30-70kJ/m ², elongation at break 450-650%; 3, flexural strength 20-60MPa, Young's modulus 5.5-7.5GPa, shore hardness 60-65D, preparation method is simple, and raw material is simple and easy to get, the widespread production not division of history into periods can replace current material.

Embodiment

Below in conjunction with example, the invention will be further described, and embodiment, only for the present invention will be described, does not form the restriction to right, and other alternative means that it may occur to persons skilled in the art that, all within the scope of the claims in the present invention.

Embodiment 1:

The first step: take PET100 part according to mass fraction proportioning, polynite 1 part, EPDM5 part, ethene 10 parts, glycidyl methacrylate 1 part, MBS1 part, CPE5 part, POE5 part, silica 1 part, 2.5 parts, magnesium oxide.

Second step: polynite and POE are dropped in reactor and mix 30min, add PET, EPDM, ethene and MBS, be warming up to 65 DEG C, with 160r/min speed mixing 45min.

3rd step: add glycidyl methacrylate, CPE, POE, silicon-dioxide and magnesium oxide, mixes rear input twin screw extruder, extruding pelletization at being warming up to 220 DEG C.

Product frictional coefficient 0.3, wear scar width is minimum, lateral shrinkage 0.9%, longitudinal contraction rate 0.7%, contraction ratio 0.8, heat-drawn wire 240 DEG C; Tensile strength 45MPa, shock strength 30kJ/m ², elongation at break 450%; Flexural strength 20MPa, Young's modulus 5.5GPa, shore hardness 60D.

Embodiment 2:

The first step: take PET100 part according to mass fraction proportioning, polynite 5 parts, EPDM25 part, ethene 30 parts, glycidyl methacrylate 20 parts, MBS5 part, CPE25 part, POE25 part, silicon-dioxide 5 parts, 4.5 parts, magnesium oxide.

Second step: polynite and POE are dropped in reactor and mix 50min, add PET, EPDM, ethene and MBS, be warming up to 85 DEG C, with 180r/min speed mixing 65min.

3rd step: add glycidyl methacrylate, CPE, POE, silicon-dioxide and magnesium oxide, mixes rear input twin screw extruder, extruding pelletization at being warming up to 240 DEG C.

Product frictional coefficient 0.25, wear scar width is minimum, lateral shrinkage 1%, longitudinal contraction rate 0.8%, contraction ratio 0.9, heat-drawn wire 250 DEG C; Tensile strength 55MPa, shock strength 40kJ/m ², elongation at break 500%; Flexural strength 30MPa, Young's modulus 6GPa, shore hardness 61D.

Embodiment 3:

The first step: take PET100 part according to mass fraction proportioning, polynite 2 parts, EPDM10 part, ethene 15 parts, glycidyl methacrylate 5 parts, MBS2 part, CPE10 part, POE10 part, silicon-dioxide 2 parts, 3 parts, magnesium oxide.

Second step: polynite and POE are dropped in reactor and mix 30min, add PET, EPDM, ethene and MBS, be warming up to 65 DEG C, with 160r/min speed mixing 45min.

3rd step: add glycidyl methacrylate, CPE, POE, silicon-dioxide and magnesium oxide, mixes rear input twin screw extruder, extruding pelletization at being warming up to 220 DEG C.

Product frictional coefficient 0.2, wear scar width is minimum, lateral shrinkage 1.1%, longitudinal contraction rate 0.9%, contraction ratio 1, heat-drawn wire 260 DEG C; Tensile strength 65MPa, shock strength 50kJ/m ², elongation at break 550%; Flexural strength 40MPa, Young's modulus 6.5GPa, shore hardness 63D.

Embodiment 4:

The first step: take PET100 part according to mass fraction proportioning, polynite 4 parts, EPDM20 part, ethene 25 parts, glycidyl methacrylate 15 parts, MBS4 part, CPE20 part, POE20 part, silicon-dioxide 4 parts, 4 parts, magnesium oxide.

Second step: polynite and POE are dropped in reactor and mix 50min, add PET, EPDM, ethene and MBS, be warming up to 85 DEG C, with 180r/min speed mixing 65min.

3rd step: add glycidyl methacrylate, CPE, POE, silicon-dioxide and magnesium oxide, mixes rear input twin screw extruder, extruding pelletization at being warming up to 240 DEG C.

Product frictional coefficient 0.15, wear scar width is minimum, lateral shrinkage 1.2%, longitudinal contraction rate 1%, contraction ratio 1.1, heat-drawn wire 270 DEG C; Tensile strength 75MPa, shock strength 60kJ/m ², elongation at break 600%; Flexural strength 50MPa, Young's modulus 7GPa, shore hardness 64D.

Embodiment 5:

The first step: take PET100 part according to mass fraction proportioning, polynite 3 parts, EPDM15 part, ethene 20 parts, glycidyl methacrylate 10 parts, MBS3 part, CPE15 part, POE15 part, silicon-dioxide 3 parts, 3.5 parts, magnesium oxide.

Second step: polynite and POE are dropped in reactor and mix 40min, add PET, EPDM, ethene and MBS, be warming up to 75 DEG C, with 170r/min speed mixing 55min.

3rd step: add glycidyl methacrylate, CPE, POE, silicon-dioxide and magnesium oxide, mixes rear input twin screw extruder, extruding pelletization at being warming up to 230 DEG C.

Product frictional coefficient 0.1, wear scar width is minimum, lateral shrinkage 1.3%, longitudinal contraction rate 1.1%, contraction ratio 1.2, heat-drawn wire 280 DEG C; Tensile strength 85MPa, shock strength 70kJ/m ², elongation at break 650%; Flexural strength 60MPa, Young's modulus 7.5GPa, shore hardness 65D.

Claims (5)

1. a PET toughened plastics, it is characterized in that, it is as follows that mass fraction proportioning pressed by the raw material of described PET toughened plastics: PET100 part, polynite 1-5 part, EPDM5-25 part, ethene 10-30 part, glycidyl methacrylate 1-20 part, MBS1-5 part, CPE5-25 part, POE5-25 part, silica 1-5 parts, magnesium oxide 2.5-4.5 part.

2. a kind of PET toughened plastics according to claim 1, it is characterized in that, it is as follows that mass fraction proportioning pressed by the raw material of described PET toughened plastics: PET100 part, polynite 2 parts, EPDM10 part, ethene 15 parts, glycidyl methacrylate 5 parts, MBS2 part, CPE10 part, POE10 part, silicon-dioxide 2 parts, 3 parts, magnesium oxide.

3. a kind of PET toughened plastics according to claim 1, it is characterized in that, it is as follows that mass fraction proportioning pressed by the raw material of described PET toughened plastics: PET100 part, polynite 4 parts, EPDM20 part, ethene 25 parts, glycidyl methacrylate 15 parts, MBS4 part, CPE20 part, POE20 part, silicon-dioxide 4 parts, 4 parts, magnesium oxide.

4. a kind of PET toughened plastics according to claim 1, it is characterized in that: the raw material of described PET toughened plastics is as follows by mass fraction proportioning: PET100 part, polynite 3 parts, EPDM15 part, ethene 20 parts, glycidyl methacrylate 10 parts, MBS3 part, CPE15 part, POE15 part, silicon-dioxide 3 parts, 3.5 parts, magnesium oxide.

5. make a method for PET toughened plastics according to claim 1, it is characterized in that, comprise the steps:

The first step: take PET, polynite, EPDM, ethene, glycidyl methacrylate, MBS, CPE, POE, silicon-dioxide and magnesium oxide according to mass fraction proportioning;

Second step: polynite and POE are dropped in reactor and mix 30-50min, add PET, EPDM, ethene and MBS, be warming up to 65-85 DEG C, with 160-180r/min speed mixing 45-65min;

3rd step: add glycidyl methacrylate, CPE, POE, silicon-dioxide and magnesium oxide, mixes rear input twin screw extruder, extruding pelletization at being warming up to 220-240 DEG C.