CN103044764A - High-toughness long-glass-fiber reinforced polypropylene composite material and method for preparing same - Google Patents

Abstract

The invention relates to a high-toughness long-glass-fiber reinforced polypropylene composite material and a method for preparing the same. The composite material is prepared from the following components in percentage by weight: 60-80% of long-glass-fiber reinforced polypropylene composite material and 20-40% of toughening masterbatch. The long-glass-fiber reinforced polypropylene composite material is prepared from the following components in parts by weight: 45-60 parts of polypropylene, 40-50 parts of glass fiber, 2-3 parts of compatibilizer, 0-0.5 part of lubricant and 0.5-1 part of antioxidant. The toughening masterbatch is prepared from the following components in parts by weight: 60-80 parts of polypropylene, 20-40 parts of toughener and 0.2-0.5 part of antioxidant. Compared with the prior art, the high-toughness long-glass-fiber reinforced polypropylene composite material has good impact resistance, strength and rigidity, excellent overall performance and notch impact strength of 52KJ/m<2>.

Description

A kind of high tenacity long glass fiber reinforced polypropylene composite material and preparation method thereof

Technical field

The invention belongs to technical field of polymer materials, especially relate to a kind of high tenacity long glass fiber reinforced polypropylene composite material and preparation method thereof.

Background technology

The long glass fibres reinforced thermoplastics(RTP) is a kind of glass fibre length reinforced thermoplastic plastics identical with pellet length.In the situation that fibre content is identical, to compare with common staple fibre reinforced thermoplastics(RTP), Long-fiber-reinforced thermoplastics has higher intensity, modulus, resistance to fatigue, thermotolerance and better dimensional stability.

Yet although the intensity of long glass fibres reinforced thermoplastics(RTP) and rigidity are better, resistance to impact shock usually can not practical requirement.CN101338051A discloses a kind of long glass fiber reinforced polypropylene material and preparation method thereof such as Chinese patent, it is that melt extrusion after polypropylene, flow ability modifying agent, compatilizer, oxidation inhibitor and the mix lubricant is formed the molten bath, long glass fibres is introduced in the molten bath and floods, coats, and then cooling, pelletizing obtain the long glass fiber reinforced polypropylene pellet.The notched Izod impact strength of the long glass fiber reinforced polypropylene material of making by the method is lower than 35KJ/m ²

Summary of the invention

Purpose of the present invention be exactly provide in order to overcome the defective that above-mentioned prior art exists that a kind of intensity is high, the high tenacity long glass fiber reinforced polypropylene composite material of good rigidly and preparation method thereof.

Purpose of the present invention can be achieved through the following technical solutions:

A kind of high tenacity long glass fiber reinforced polypropylene composite material, made by the component that comprises following weight percent:

Long glass fiber reinforced polypropylene composite material 60-80%;

Plasticizing mother particle 20-40%.

Described long glass fiber reinforced polypropylene composite material is made by the component that comprises following weight part:

Polypropylene 45-60,

Glass fibre 40-50,

Compatilizer 2-3,

Lubricant 0-0.5,

Oxidation inhibitor 0.5-1.

Described plasticizing mother particle comprises following component and weight part content thereof:

Polypropylene 60-80,

Toughner 20-40,

Oxidation inhibitor 0.2-0.5.

Described compatilizer is selected from maleic anhydride inoculated polypropylene or glycidyl methacrylate and polyacrylic multipolymer.

Described lubricant is selected from one or more in paraffin, Poly Propylene Wax, polyethylene wax, amide waxe, stearic acid and/or its salt.

Described oxidation inhibitor is selected from one or more in Hinered phenols, hindered amines, phosphorous acid ester or the thioether kind antioxidant.

Described oxidation inhibitor is selected from one or more among antioxidant 1010, oxidation inhibitor 1098, irgasfos 168 and/or the oxidation inhibitor DSTDP.

Described toughner is thermoplastic elastic body.

Described toughner is selected from one or more in terpolymer EP rubber EPDM, polystyrene block copolymer SEBS or the polyolefin elastomer.

A kind of preparation method of high tenacity long glass fiber reinforced polypropylene composite material may further comprise the steps:

(1) preparation long glass fiber reinforced polypropylene composite material:

A, get the raw materials ready according to the component of following weight part: polypropylene 45-60, glass fibre 40-50, compatilizer 2-3, lubricant 0-0.5, oxidation inhibitor 0.5-1,

B, polypropylene, glass fibre, compatilizer, lubricant and oxidation inhibitor are mixed, and under 180-220 ℃ of condition plastifying fusion, obtain the acrylic resin melt of melting,

C, be extruded in the melt impregnation mould by the resin melt of twin screw extruder with melting, continuous glass fibre is drawn by creel simultaneously, enters the dipping die head of the acrylic resin melt that contains melting, realizes dispersion and the infiltration of fiber in die head,

D, cooling curing according to demand through the dicing machine pelletizing, obtain long glass fiber reinforced polypropylene composite material with above-mentioned matrix material;

(2) preparation plasticizing mother particle:

A, get the raw materials ready according to the component of following weight part: polypropylene 60-80, toughner 20-40, oxidation inhibitor 0.2-0.5,

B, polypropylene, toughner, oxidation inhibitor joined carries out high-speed mixing 5-10 minute in the high-speed mixer,

C, said mixture is put into twin screw extruder, under 180-220 ℃ of condition, extrude and granulation, obtain plasticizing mother particle;

(3) preparation high tenacity long glass fiber reinforced polypropylene composite material:

A, get the raw materials ready according to following component and weight percent content: long glass fiber reinforced polypropylene composite material 60-80%, plasticizing mother particle 20-40%;

B, long glass fiber reinforced polypropylene composite material and plasticizing mother particle joined in the high-speed mixer mix, namely get product.

Compared with prior art, the invention has the advantages that to have added plasticizing mother particle, make the long glass fiber reinforced polypropylene composite material that makes possess good shock resistance, its notched Izod impact strength can reach 52KJ/m ², and intensity and rigidity also remain on higher level, over-all properties is superior.

Embodiment

The present invention is described in detail below in conjunction with specific embodiment.

Embodiment 1

The preparation method of high tenacity long glass fiber reinforced polypropylene composite material may further comprise the steps:

(1) with polypropylene 46kg, maleic anhydride inoculated polypropylene 3kg, Poly Propylene Wax 0.4kg, oxygen agent 10100.2kg, irgasfos 168 0.4kg plastifying fusion under 180～220 ℃ of conditions, obtains the acrylic resin melt; With the melt impregnation of continuous glass fibre through described acrylic resin, so that the glass fibre complete wetting; Above-mentioned glass fibre is drawn by creel, through the tensioning roller adjustment of tonicity, enter the melt impregnation die head, in die head, realize dispersion and the infiltration of fiber, the content of the control of export fiber of the fiber by die head is 50kg, cooling curing is cut into 10mm length through dicing machine, obtains long glass fiber reinforced polypropylene composite material A;

(2) acrylic resin 79.7kg, terpolymer EP rubber EPDM 20kg, antioxidant 1010 0.1kg, irgasfos 168 0.2kg are joined carried out high-speed mixing in the high-speed mixer 5 minutes, then put into twin screw extruder, under 180～200 ℃ of temperature, extrude and granulation, obtain plasticizing mother particle B;

(3) with long glass fiber reinforced polypropylene composite material A 60kg and toughening flame-proof mother particle B 40kg, join to mix in the high-speed mixer and get final product.

The product performance test result for preparing sees Table 1.

Embodiment 2

The preparation method of high tenacity long glass fiber reinforced polypropylene composite material may further comprise the steps:

(1) with polypropylene 57.4kg, maleic anhydride inoculated polypropylene 2kg, antioxidant 1010 0.2kg, irgasfos 168 0.4kg plastifying fusion under 180～220 ℃ of conditions, obtains the acrylic resin melt; With the melt impregnation of continuous glass fibre through described acrylic resin, so that the glass fibre complete wetting; Above-mentioned glass fibre is drawn by creel, through the tensioning roller adjustment of tonicity, enter the melt impregnation die head, in die head, realize dispersion and the infiltration of fiber, the content of the control of export fiber of the fiber by die head is 40kg, cooling curing is cut into 12mm length through dicing machine, obtains long glass fiber reinforced polypropylene composite material C;

(2) acrylic resin 69.7kg, terpolymer EP rubber EPDM 30kg, antioxidant 1010 0.1kg, irgasfos 168 0.2kg are joined carried out high-speed mixing in the high-speed mixer 5 minutes, then put into twin screw extruder, under 180～210 ℃ of temperature, extrude and granulation, obtain plasticizing mother particle D;

(3) with long glass fiber reinforced polypropylene composite material C 70kg and toughening flame-proof master batch D 30kg, join to mix in the high-speed mixer and get final product.

The product performance test result for preparing sees Table 1.

Embodiment 3

The preparation method of high tenacity long glass fiber reinforced polypropylene composite material may further comprise the steps:

(1) with polypropylene 46.4kg, maleic anhydride inoculated polypropylene 3kg, antioxidant 1010 0.2kg, irgasfos 168 0.4kg plastifying fusion under 180～220 ℃ of conditions, obtains the acrylic resin melt; With the melt impregnation of continuous glass fibre through described acrylic resin, so that the glass fibre complete wetting; Above-mentioned glass fibre is drawn by creel, through the tensioning roller adjustment of tonicity, enter the melt impregnation die head, in die head, realize dispersion and the infiltration of fiber, the content of the control of export fiber of the fiber by die head is 50kg, cooling curing is cut into 11mm length through dicing machine, obtains long glass fiber reinforced polypropylene composite material E;

(2) acrylic resin 59.7kg, polyolefin elastomer 40kg, antioxidant 1010 0.1kg, irgasfos 168 0.2kg are joined carried out high-speed mixing in the high-speed mixer 5 minutes, then put into twin screw extruder, under 180～210 ℃ of temperature, extrude and granulation, obtain plasticizing mother particle F;

(3) with long glass fiber reinforced polypropylene composite material E 80kg and toughening flame-proof master batch F 20kg, join to mix in the high-speed mixer and get final product.

The product performance test result for preparing sees Table 1.

Table 1 embodiment 1,2,3 product performance results test

	Testing standard	Embodiment 1	Embodiment 2	Embodiment 3
					Tensile strength (MPa)	GB/T 1040	120	112	127
Flexural strength (MPa)	GB/T 9341	166	154	171
					Modulus in flexure (MPa)	GB/T 9341	5978	5571	7061
Socle girder notched Izod impact strength (kJ/m 2)	GB/T 1843	46	49	52

As can be seen from Table 1, the high tenacity long glass fiber reinforced polypropylene composite material for preparing by the present invention possesses good shock resistance, and its notched Izod impact strength can reach 52KJ/m ², simultaneously, its intensity and rigidity also remain on higher level, and over-all properties is superior.

Claims (10)

1. a high tenacity long glass fiber reinforced polypropylene composite material is characterized in that, this material is made by the component that comprises following weight percent:

Long glass fiber reinforced polypropylene composite material 60-80%;

Plasticizing mother particle 20-40%.

2. a kind of high tenacity long glass fiber reinforced polypropylene composite material according to claim 1, it is characterized in that, described long glass fiber reinforced polypropylene composite material is made by the component that comprises following weight part: polypropylene 45-60, glass fibre 40-50, compatilizer 2-3, lubricant 0-0.5, oxidation inhibitor 0.5-1.

3. a kind of high tenacity long glass fiber reinforced polypropylene composite material according to claim 1 is characterized in that, described plasticizing mother particle is made by the component that comprises following weight part: polypropylene 60-80, toughner 20-40, oxidation inhibitor 0.2-0.5.

4. a kind of high tenacity long glass fiber reinforced polypropylene composite material according to claim 2 is characterized in that, described compatilizer is selected from maleic anhydride inoculated polypropylene or glycidyl methacrylate and polyacrylic multipolymer.

5. a kind of high tenacity long glass fiber reinforced polypropylene composite material according to claim 2 is characterized in that, described lubricant is selected from one or more in paraffin, Poly Propylene Wax, polyethylene wax, amide waxe, stearic acid and/or its salt.

6. according to claim 2 or 3 described a kind of high tenacity long glass fiber reinforced polypropylene composite materials, it is characterized in that, described oxidation inhibitor is selected from one or more in Hinered phenols, hindered amines, phosphorous acid ester or the thioether kind antioxidant.

7. according to claim 2 or 3 described a kind of high tenacity long glass fiber reinforced polypropylene composite materials, it is characterized in that, described oxidation inhibitor is selected from one or more among antioxidant 1010, oxidation inhibitor 1098, irgasfos 168 and/or the oxidation inhibitor DSTDP.

8. a kind of high tenacity long glass fiber reinforced polypropylene composite material according to claim 3 is characterized in that, described toughner is thermoplastic elastic body.

9. a kind of high tenacity long glass fiber reinforced polypropylene composite material according to claim 3, it is characterized in that, described toughner is selected from one or more in terpolymer EP rubber EPDM, polystyrene block copolymer SEBS or the polyolefin elastomer.

10. preparation method of high tenacity long glass fiber reinforced polypropylene composite material as described in claim 1, it is characterized in that: the method may further comprise the steps:

(1) preparation long glass fiber reinforced polypropylene composite material:

A, get the raw materials ready according to the component of following weight part: polypropylene 45-60, glass fibre 40-50, compatilizer 2-3, lubricant 0-0.5, oxidation inhibitor 0.5-1,

B, polypropylene, glass fibre, compatilizer, lubricant and oxidation inhibitor are mixed, and under 180-220 ℃ of condition plastifying fusion, obtain the acrylic resin melt of melting,

C, be extruded in the melt impregnation mould by the resin melt of twin screw extruder with melting, continuous glass fibre is drawn by creel simultaneously, enters the dipping die head of the acrylic resin melt that contains melting, realizes dispersion and the infiltration of fiber in die head,

D, cooling curing according to demand through the dicing machine pelletizing, obtain long glass fiber reinforced polypropylene composite material with above-mentioned matrix material;

(2) preparation plasticizing mother particle:

A, get the raw materials ready according to the component of following weight part: polypropylene 60-80, toughner 20-40, oxidation inhibitor 0.2-0.5,

B, polypropylene, toughner, oxidation inhibitor joined carries out high-speed mixing 5-10 minute in the high-speed mixer,

C, said mixture is put into twin screw extruder, under 180-220 ℃ of condition, extrude and granulation, obtain plasticizing mother particle;

(3) preparation high tenacity long glass fiber reinforced polypropylene composite material:

A, get the raw materials ready according to following component and weight percent content: long glass fiber reinforced polypropylene composite material 60-80%, plasticizing mother particle 20-40%;

B, long glass fiber reinforced polypropylene composite material and plasticizing mother particle joined in the high-speed mixer mix, namely get product.