High-efficiency environmental-friendly polypropylene compatilizer and preparation method thereof

Abstract

The invention relates to a high-efficiency environmental-friendly polypropylene compatilizer and a preparation method thereof. 60-95 polypropylene, 0.1-10 initiating agent, 1-20 maleic anhydride, 0.5-15 comonomer and 0.1-7 antidegradant are put in a high-pressure reaction vessel by weight percent (the sum of weight percent of all the raw materials is equal to 100 percent.), the solid phase grafting reaction is performed to the mixture for 0.2-2 hours under the stirring action to obtain polypropylene initiation masterbatch, then 2-30 percent by weight of polypropylene initiation masterbatch and 70-98 percent by weight of pure polypropylene are mixed in a high-speed mixer at the room temperature, then the melting graft reaction is performed to the mixture on a double-screw extruder, and then the extrusion granulation is carried out to obtain the maleic anhydride grafted polypropylene compatilizer. Compared with the prior art, the method is simple and also suitable for the industrial production, and no solvent is required to be used, therefore, no harmful toxic matter emission exists, and meanwhile, the high-efficiency environmental-friendly polypropylene compatilizer has low residual quantity of acid anhydride and odor and is beneficial to environmental protection.

Description

Technical field

[0001] The invention relates to the field of polymer science, in particular to a high-efficiency environmentally friendly polypropylene compatibilizer and a preparation method thereof. Background technique

[0002] Polypropylene is widely used, but because polyolefin is a non-polar material, the compatibility of polypropylene with most polymers, inorganic fillers and metals is not good when compounding, which affects the properties of composite materials, such as mechanical properties and heat resistance. Performance, surface finish, coatability, etc., which limit its wide application. Maleic anhydride grafted polypropylene can improve the non-polar condition of its surface. Polar maleic anhydride grafts onto the polypropylene backbone to give the material special properties, which can well improve the blending and filling materials. Interface performance, which significantly improves the performance of composite materials, therefore, its application as a compatib...

Examples

Embodiment 1

[0029] First, 600 grams of homopolypropylene (molecular weight of 50,000), 200 grams of maleic anhydride, 50 grams of dibenzoyl peroxide, 100 grams of acrylamide, and 50 grams of tetra[β-(3', 5'-di-tert-butyl-4'-hydroxyphenyl) propionic acid] pentaerythritol ester was subjected to solid phase grafting reaction at 50°C and 3000 rpm for 2 hours to prepare polypropylene initiating masterbatch. After mixing 2% of polypropylene initiating masterbatch and 98% of homopolypropylene (molecular weight 300,000) on a high-speed mixer at room temperature at 2400 rpm, the melting temperature is 170 ℃ and the rotation speed is 60 rpm on the twin-screw extruder. The melt extrusion grafting reaction is performed to obtain a maleic anhydride polypropylene grafted material with a low odor with a grafting rate of 1.0% and an acid anhydride residual content of less than 0.5%.

Embodiment 2

[0031] Firstly, 900 grams of homopolypropylene (with a molecular weight of 100,000), 80 grams of maleic anhydride, 3 grams of di-tert-butyl peroxide, 5 grams of acrylic acid, 6 grams of triphenyl phosphite and 6 grams of thio were added to the autoclave. Dilauryl dipropionate was subjected to solid-phase grafting reaction at 120°C and 2400 revolutions / min for 0.5 hours to prepare polypropylene initiation masterbatch, and then 30% of the above-prepared polypropylene initiation masterbatch was mixed with homopolypropylene (molecular weight: 1.2 million) 70% was mixed on a high-speed mixer at room temperature at 3000 rpm, then melted and extruded on a twin-screw extruder with a melting temperature of 220°C and a rotating speed of 300 rpm to obtain the grafting rate A low-odor maleic anhydride polypropylene grafted material with 1.2% and an acid anhydride residual content of less than 0.2%.

[0032] The maleic anhydride grafted polypropylene compatibilizer prepared by the method of th...

Embodiment 3

[0045]First, 950 grams of homopolypropylene (molecular weight 2 million), 10 grams of maleic anhydride, 1 gram of azobisisobutyronitrile, 38 grams of α-methacrylic acid, and 1 gram of N,N′-bis [3-(3,5-Di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine was subjected to solid-phase grafting reaction at 130°C and 300 rpm for 0.2 hours to prepare polypropylene initiating masterbatch, and then After mixing 40% of the polypropylene initiator masterbatch prepared above and 60% of homopolypropylene (molecular weight 1.2 million) on a high-speed mixer at 1200 rpm at room temperature, the melting temperature of the twin-screw extruder is 240°C and the rotation speed is 600 The melt extrusion grafting reaction is carried out at revolutions per minute to obtain a low-odor maleic anhydride polypropylene grafted material with a grafting rate of 1.0% and a residual acid anhydride content of less than 0.5%.

Technical field

[0001] The invention relates to the field of polymer science, in particular to a high-efficiency environmentally friendly polypropylene compatibilizer and a preparation method thereof. Background technique

[0002] Polypropylene is widely used, but because polyolefin is a non-polar material, the compatibility of polypropylene with most polymers, inorganic fillers and metals is not good when compounding, which affects the properties of composite materials, such as mechanical properties and heat resistance. Performance, surface finish, coatability, etc., which limit its wide application. Maleic anhydride grafted polypropylene can improve the non-polar condition of its surface. Polar maleic anhydride grafts onto the polypropylene backbone to give the material special properties, which can well improve the blending and filling materials. Interface performance, which significantly improves the performance of composite materials, therefore, its application as a compatib...

Examples

Embodiment 1

[0029] First, 600 grams of homopolypropylene (molecular weight of 50,000), 200 grams of maleic anhydride, 50 grams of dibenzoyl peroxide, 100 grams of acrylamide, and 50 grams of tetra[β-(3', 5'-di-tert-butyl-4'-hydroxyphenyl) propionic acid] pentaerythritol ester was subjected to solid phase grafting reaction at 50°C and 3000 rpm for 2 hours to prepare polypropylene initiating masterbatch. After mixing 2% of polypropylene initiating masterbatch and 98% of homopolypropylene (molecular weight 300,000) on a high-speed mixer at room temperature at 2400 rpm, the melting temperature is 170 ℃ and the rotation speed is 60 rpm on the twin-screw extruder. The melt extrusion grafting reaction is performed to obtain a maleic anhydride polypropylene grafted material with a low odor with a grafting rate of 1.0% and an acid anhydride residual content of less than 0.5%.

Embodiment 2

[0031] Firstly, 900 grams of homopolypropylene (with a molecular weight of 100,000), 80 grams of maleic anhydride, 3 grams of di-tert-butyl peroxide, 5 grams of acrylic acid, 6 grams of triphenyl phosphite and 6 grams of thio were added to the autoclave. Dilauryl dipropionate was subjected to solid-phase grafting reaction at 120°C and 2400 revolutions / min for 0.5 hours to prepare polypropylene initiation masterbatch, and then 30% of the above-prepared polypropylene initiation masterbatch was mixed with homopolypropylene (molecular weight: 1.2 million) 70% was mixed on a high-speed mixer at room temperature at 3000 rpm, then melted and extruded on a twin-screw extruder with a melting temperature of 220°C and a rotating speed of 300 rpm to obtain the grafting rate A low-odor maleic anhydride polypropylene grafted material with 1.2% and an acid anhydride residual content of less than 0.2%.

[0032] The maleic anhydride grafted polypropylene compatibilizer prepared by the method of th...

Embodiment 3

[0045]First, 950 grams of homopolypropylene (molecular weight 2 million), 10 grams of maleic anhydride, 1 gram of azobisisobutyronitrile, 38 grams of α-methacrylic acid, and 1 gram of N,N′-bis [3-(3,5-Di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine was subjected to solid-phase grafting reaction at 130°C and 300 rpm for 0.2 hours to prepare polypropylene initiating masterbatch, and then After mixing 40% of the polypropylene initiator masterbatch prepared above and 60% of homopolypropylene (molecular weight 1.2 million) on a high-speed mixer at 1200 rpm at room temperature, the melting temperature of the twin-screw extruder is 240°C and the rotation speed is 600 The melt extrusion grafting reaction is carried out at revolutions per minute to obtain a low-odor maleic anhydride polypropylene grafted material with a grafting rate of 1.0% and a residual acid anhydride content of less than 0.5%.

Images