CN107226966A - A kind of outdoor poly styrene composite material and preparation method thereof - Google Patents

Abstract

The invention discloses a polystyrene composite material for outdoor use, which comprises 1000-2000 parts of recycled foamed plastic polystyrene, 50-300 parts of wood powder, and 20-100 parts of an interface modifier in parts by weight. , 1-30 parts of foaming agent, 5-50 parts of nucleating agent, 50-200 parts of white oil, 100-1000 parts of impact modifier and 3-20 parts of antioxidant. The present invention also provides a preparation method for the above polystyrene composite material for outdoor use. The polystyrene composite material for outdoor use of the present invention has good mechanical properties and heat and oxygen aging resistance; it can be applied to wood-plastic interior doors, skirting Lines, integral cabinets, wardrobes, external wall hanging panels, ceilings, decorative wall panels, outdoor floors, guardrail columns, plastic steel gazebos, garden guardrails, balcony guardrails, garden fences, leisure benches, tree pools, flower stands, flower box air conditioners racks, air conditioner shrouds, shutters, pavement signs, shipping pallets, and more.

Description

A kind of outdoor polystyrene composite material and preparation method thereof

technical field

The invention belongs to the technical field of polymer materials, and relates to a composite material, in particular to an outdoor polystyrene composite material and a preparation method thereof.

Background technique

Wood-plastic composite (WPC) is a new type of green and environmentally friendly composite material. It forms a new type of material with a new structure and excellent comprehensive properties through fusion and composite processing. It has high mechanical strength, good processability, and repeatability. Utilization, strong chemical corrosion resistance and other advantages make it used in the fields of construction, interior and exterior decoration and automobiles, and has received extensive attention from all over the world. However, since wood-plastic composite materials are mainly extruded from wood powder and plastic, and the density of plastic and wood powder is higher than the apparent density of wood, this will increase the density of the material virtually and affect the strength-to-weight ratio of the material. The application of the material is limited. By adding a foaming agent, the cells are introduced into the wood-plastic composite material to form a foam composite material to reduce the density. In addition to the advantages of wood-plastic composite materials, foamed wood-plastic composite materials can also passivate the tip of cracks and prevent the expansion of cracks due to the good cell structure inside the material, thus effectively overcoming the brittleness of wood-plastic composite materials. The shortcomings of low ductility and impact stress resistance, and reduce the density of the material, not only save raw materials, but also improve sound insulation and heat insulation performance.

At present, most foamed wood-plastic products use polyvinyl chloride (PVC) resin as the matrix, because of its obvious advantages such as low cost, good mechanical properties, and good touch, it is widely used in actual production. But at the same time, its non-recyclable, complex chemical additives, serious pollution and other disadvantages are also more significant. The foamed wood-plastic composite material using polystyrene (PS) resin as a matrix not only has excellent foaming performance, is easy to process, does not require a large amount of additives, and can use waste polystyrene as a raw material, which can be recycled and reused. In line with environmental trends. At the same time, the surface is made more woody through the foaming process. However, the foaming of wood-plastic composite materials is very complicated, involving many factors, such as processing temperature, extrusion pressure, wood/plastic interface compatibility, polymer rheology, etc. Research is rare, and most research is still in its infancy. The density, mechanical properties, weather resistance, and aging resistance of the polystyrene composite materials prepared at present cannot meet the performance requirements.

Contents of the invention

Aiming at the above-mentioned technical problems in the prior art, the present invention provides a polystyrene composite material for outdoor use and its preparation method. The foamed wood-plastic products are not recyclable, the chemical additives are complicated, and the technical problems are serious pollution.

The invention provides a polystyrene composite material for outdoor use, and its raw material composition and content are as follows:

Recycling 1000-2000 copies of polystyrene foam;

Wood powder 50-300 parts;

Interface modifier 20-100 parts;

Foaming agent 1-30 parts;

5-50 parts of nucleating agent;

50-200 parts of white oil;

Impact modifier 100-1000 parts;

Antioxidant 3-20 parts;

The wood flour is 100-300 mesh ash, elm, eucalyptus, camphor, basswood, birch, colored wood, teak, beech, cherry wood, rosewood, cypress, yew, red pine, oak , yellow pineapple, walnut catalpa, Schima superba, rosewood, mahogany, neem, Chinese toon, jujube wood or bamboo powder, or any one or a mixture of two or more;

The interface modifier is any one or a mixture of two or more of maleic anhydride-grafted polystyrene, maleic anhydride-grafted polypropylene or maleic anhydride-grafted polyethylene;

The foaming agent is any one or a mixture of two or more of azodicarbonamide, azobisisobutyronitrile, sodium bicarbonate or ammonium carbonate;

The nucleating agent is any one or a mixture of two or more of talcum powder, nano Al ₂ O ₃ , ZrO ₂ or SiO ₂ ;

The impact modifier is any one or a mixture of two or more of high impact polystyrene HIPS, polyolefin elastomer POE, EPDM, SEBS;

The antioxidants are diphenylamine, p-phenylenediamine, dihydroquinoline and other compounds and their derivatives or polymers, 2,6-tertiary butyl-4-methylphenol, bis(3,5- Either one or both mixture of the above.

The present invention also provides the above-mentioned preparation method of polystyrene composite material for outdoor use, comprising the following steps: according to the formula, adding recycled foamed plastic polystyrene, wood flour into the internal mixer with a control speed of 30-40r/min , interface modifier, nucleating agent, foaming agent, white oil, impact modifier, antioxidant, at a temperature of 200-210°C, at a speed of 30r/min for 10-60min, and discharged Thin flakes are sent to a pulverizer for granulation, and then formed into products by an injection molding machine.

A polystyrene composite material for outdoor use of the present invention has good mechanical properties after being foamed and modified by wood flour and interface modifiers. The Sun500 type of GALDABINI Company conducts the tensile strength test of polystyrene composite materials for outdoor use, the tensile speed is 5 mm/min, and the tensile strength is greater than 30MPa. The thermal aging performance of the above-mentioned sample was tested with the 401A thermal oxygen aging tester of Jiangdu Jingcheng Testing Instrument Factory. It still has good tensile strength after thermal aging at 70°C for 24 hours, 48 hours, and 72 hours. and elongation at break.

Compared with the prior art, the technical progress of the present invention is remarkable. The invention is a polystyrene composite material for outdoor use with good mechanical properties and heat-aging resistance; and the preparation process is simple, and the technology is mature, fast and efficient, and can be applied to wood-plastic interior doors, skirting boards, and integral cabinets , Wardrobe, Exterior Wall Hanging Panel, Ceiling, Decorative Wall Panel, Outdoor Floor, Guardrail Column, Plastic Steel Gazebo, Garden Guardrail, Balcony Guardrail, Garden Fence, Leisure Bench, Tree Pool, Flower Stand, Flower Box Air Conditioning Stand, Air Conditioning Guard Covers, shutters, pavement signs, shipping pallets and more.

detailed description

The present invention is described in further detail below by way of examples, but the present invention is not limited.

Among the raw materials used in the various embodiments of the present invention, except for the manufacturers and specifications specifically indicated, other raw materials are commercially available, and the specifications are all chemically pure.

The model of various equipment used in the present invention and the information of manufacturer are as follows:

S(X)M-1L-KA experimental internal mixer, Changzhou Traceable Rubber Technology Co., Ltd.

YL-2230 pulverizer, Shanghai Yunlong Plastic Machinery Co., Ltd.;

FT-80I injection molding machine, Zhejiang Shenda Plastic Machinery Co., Ltd.;

401A thermal oxygen aging tester, Jiangdu Jingcheng Testing Instrument Factory;

Example 1

A polystyrene composite material for outdoor use, calculated in parts by weight, its raw material composition and content are as follows:

1,000 copies of recycled Styrofoam polystyrene;

50 parts of wood flour;

20 parts of interface modifier;

Foaming agent 1 part;

5 parts of nucleating agent;

50 parts white oil;

100 parts of impact modifier;

Antioxidant 3 parts;

Wherein: the recycled polystyrene foam is provided by Shanghai Yingke Industrial Co., Ltd.;

The wood powder is a mixture of 300 mesh Northeastern elm, camphor wood, basswood, birch or bamboo powder in a mass ratio of 1:1:1:1:2;

Described interfacial modifier is the polystyrene of maleic anhydride grafting;

Described nucleating agent is talcum powder, ZrO The mixture that forms by mass ratio ₂ :1;

The impact modifier is a mixture of high impact polystyrene HIPS, polyolefin elastomer POE, and SEBS in a mass ratio of 3:1:1;

Described white oil is provided by Shanghai Yingke Industrial Co., Ltd.;

Described whipping agent is the mixture that azodicarbonamide or ammonium carbonate form by mass ratio 8:1;

Described antioxidant is AO-80.

In this embodiment, a method for preparing an outdoor polystyrene composite material specifically includes the following steps:

According to the formula, add 1000 parts of recycled polystyrene foam, 50 parts of wood flour, 20 parts of interface modifier, 5 parts of nucleating agent, 1 part of foaming agent, 50 parts of White oil, 100 parts of impact modifier, 3 parts of antioxidant, banburying at 210 ° C for 10 min at 30 r/min, and discharging into flakes, sent to a crusher for granulation, and formed by an injection molding machine into products.

Further, according to GB/T1040-2006 standard "Determination of tensile properties of plastics", the Italian GALDABINI company Sun500 was used to test the tensile strength of polystyrene composite materials for outdoor use, the tensile speed was 5 mm/min, and the measured results were listed in Table 1 .

Use the 401A thermal oxygen aging tester of Jiangdu Jingcheng Testing Instrument Factory to test the thermal aging performance of the above-mentioned samples, set the oven temperature to 70°C, and select 10-15 pieces for each group and place them for 24 hours, 48 hours, and 72 hours respectively. Finally, take out and measure the tensile strength and elongation at break respectively, and the results are listed in Table 1.

The polystyrene composite material for outdoor use obtained in the above Example 1 has good mechanical properties and heat-oxidative aging resistance.

Example 2

A polystyrene composite material for outdoor use, calculated in parts by weight, its raw material composition and content are as follows:

2,000 parts of recycled Styrofoam polystyrene;

300 parts of wood flour;

100 parts of interface modifier;

Foaming agent 30 parts;

50 parts of nucleating agent;

200 parts of white oil;

Impact modifier 1000 parts;

Antioxidant 20 parts;

Wherein: the recycled polystyrene foam is provided by Shanghai Yingke Industrial Co., Ltd.;

The wood powder is a mixture of 100-300 mesh Schima superba, rosewood, jujube wood or bamboo powder in a mass ratio of 2:2:1:1;

Described interfacial modifier is the mixture of the polystyrene of maleic anhydride grafting, the polypropylene of maleic anhydride grafting by mass ratio 2:1;

The nucleating agent is a mixture of talcum powder and nano _{- Al2O3} in a mass ratio of 1:1;

The impact modifier is high impact polystyrene HIPS;

Described white oil is provided by Shanghai Yingke Industrial Co., Ltd.;

Described whipping agent is the mixture that azodicarbonamide, sodium bicarbonate form by mass ratio 10:1;

The antioxidant is a mixture of 2,6-tertiary butyl-4-methylphenol and AO-80 in a mass ratio of 1:2.

In this embodiment, a method for preparing an outdoor polystyrene composite material specifically includes the following steps:

According to the formula, add 2000 parts of recycled polystyrene foam, 300 parts of wood flour, 100 parts of interface modifier, 50 parts of nucleating agent, 30 parts of foaming agent, 200 parts of White oil, 1000 parts of impact modifier, 20 parts of antioxidant, banburying at 200°C and 30r/min for 60min, the material is discharged into flakes, sent to a pulverizer for granulation, and molded by an injection molding machine. into products.

Further, according to GB/T1040-2006 standard "Determination of tensile properties of plastics", the Italian GALDABINI company Sun500 was used to test the tensile strength of polystyrene composite materials for outdoor use, the tensile speed was 5 mm/min, and the measured results were listed in Table 1 .

Table 1 Properties of polystyrene composites before and after aging

Use the 401A thermal oxygen aging tester of Jiangdu Jingcheng Testing Instrument Factory to test the thermal aging performance of the above-mentioned samples, set the oven temperature to 70°C, and select 10-15 pieces for each group and place them for 24 hours, 48 hours, and 72 hours respectively. Finally, take out and measure the tensile strength and elongation at break respectively, and the results are listed in Table 1.

The polystyrene composite material for outdoor use obtained in Example 2 above has better mechanical properties and heat-oxidative aging resistance.

In summary, the polystyrene composite material for outdoor use of the present invention, a polystyrene composite material for outdoor use of the present invention, after the combined action of foaming, wood powder, interface modifier and impact modifier, has Good mechanical properties. After heat aging at 70°C for 24 hours, 48 hours and 72 hours, it still has good tensile strength and elongation at break. It shows that the outdoor polystyrene composite material prepared by this method has better mechanical properties and heat-oxidative aging resistance.

The above content is only a basic description of the concept of the present invention, and any equivalent transformation made according to the technical solution of the present invention shall fall within the scope of protection of the present invention.

Claims (2)

1. A polystyrene composite material for outdoor use, characterized in that, calculated in parts by weight, its raw material composition and content are as follows: Recycling 1000-2000 copies of polystyrene foam; Wood powder 50-300 parts; Interface modifier 20-100 parts; Foaming agent 1-30 parts; 5-50 parts of nucleating agent; 50-200 parts of white oil; Impact modifier 100-1000 parts; Antioxidant 3-20 parts; The wood flour is 100-300 mesh ash, elm, eucalyptus, camphor, basswood, birch, colored wood, teak, beech, cherry wood, rosewood, cypress, yew, red pine, oak , yellow pineapple, walnut catalpa, Schima superba, rosewood, mahogany, neem, Chinese toon, jujube wood or bamboo powder, or any one or a mixture of two or more; The interface modifier is any one or a mixture of two or more of maleic anhydride-grafted polystyrene, maleic anhydride-grafted polypropylene or maleic anhydride-grafted polyethylene; The foaming agent is any one or a mixture of two or more of azodicarbonamide, azobisisobutyronitrile, sodium bicarbonate or ammonium carbonate; The nucleating agent is any one or a mixture of two or more of talcum powder, nano Al ₂ O ₃ , ZrO ₂ or SiO ₂ ; The impact modifier is any one or a mixture of two or more of high impact polystyrene HIPS, polyolefin elastomer POE, EPDM, SEBS; The antioxidants are diphenylamine, p-phenylenediamine, dihydroquinoline and other compounds and their derivatives or polymers, 2,6-tertiary butyl-4-methylphenol, bis(3,5- Either one or both mixture of the above. 2. the preparation method of a kind of outdoor polystyrene composite material described in claim 1 is characterized in that comprising the following steps: according to prescription, in the internal mixer of control rotating speed 30-40r/min, add reclaimed polystyrene polystyrene foam Ethylene, wood powder, interfacial modifier, nucleating agent, foaming agent, white oil, impact modifier, antioxidant, at a temperature of 200-210°C, at a speed of 30r/min for 10-60min, The output material is made into flakes, sent to a pulverizer for granulation, and formed into a product by an injection molding machine.