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Preparation method of nano-modified polypropylene anti-aging special material
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A nano-modification, polypropylene technology, applied in the direction of magnesium oxide, titanium dioxide, zinc oxide/zinc hydroxide, etc., can solve the problems of reduced flexibility, insufficient high-temperature rigidity, large spherulite particles, etc., to achieve good mechanical strength, reduce Catalytic degradation, effect of improving dispersibility
Active Publication Date: 2017-01-25
台州市黄岩红运机车部件有限公司
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Problems solved by technology
However, polypropylene has the following disadvantages: 1) The side methyl group on the molecular chain reduces the flexibility of the chain, and the spherulite particles are large, making it brittle, poor in impact resistance, and insufficient in high temperature rigidity
2) It is a non-polar polymer with poor dyeability, adhesion, antistatic properties and inorganic compatibility
3) The processing and molding shrinkage rate is large, and the dimensional stability of the product is low
4) Poor resistance to aging and degradation
However, the above-mentioned nanopowders either cannot fully improve the performance of polypropylene materials or have a strong catalytic degradation effect on polypropylene materials.
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Embodiment 1
[0019] a) Using TiCl 4 , Zn 3 (C 6 h 5 o 7 ) 2 2H 2 O, Mg(NO 3 ) 2 ·6H 2 O as the initial raw material, according to the general formula Ti 0.6 Mg 0.2 Zn 0.1 o 1.5 Weighing; the TiCl 4 , Zn 3 (C 6 h 5 o 7 ) 2 2H 2 O, Mg(NO 3 ) 2 ·6H 2 O mixed, adding deionized water to make a solution, the concentration of metal ions in the solution is 0.60-0.70mol / L; the above solution is atomized into droplets with a particle size of 10 microns, under the carrier gas flow rate of 35-40L / min Import into the reaction chamber; use the method of pulsating flow heating at a temperature of 500-700°C to heat-treat the atomized solution in the reaction chamber, with a pulse frequency of 60-130Hz; obtain composite nano-oxide powder;
[0020] b) Ultrasonic dispersion of 5wt% composite nano-oxide deionized water slurry for 30min, and dropwise adding 0.05mol / L Na 2 SiO 3 solution, adjust the pH of the slurry to 9.3, and control the molar ratio of SiO 2 / Composite nano oxide=1 / 1,...
Embodiment 2
[0024] 115 parts of polypropylene, 25 parts of ethylene-propylene rubber, 10 parts of surface-modified composite nano-oxide powder, 11 parts of ethylene bis-stearamide, 0.8 part of chlorinated polyethylene, and 0.4 part of antioxidant.
[0025] Initial raw material TiCl 4 , Zn 3 (C 6 h 5 o 7 ) 2 2H 2 O, Mg(NO 3 ) 2 ·6H 2 O according to the general formula Ti 0.7 Mg 0.3 Zn 0.15 o 1.85 Weighing; the antioxidant is β-(4-hydroxyphenyl-3,5-di-tert-butyl) n-octadecyl propionate.
[0026] Process step is with embodiment 1.
Embodiment 3
[0028] 120 parts of polypropylene, 25 parts of ethylene-propylene rubber, 15 parts of surface-modified composite nano-oxide powder, 12 parts of ethylene bisstearamide, 0.9 part of chlorinated polyethylene, and 0.6 part of antioxidant.
[0029] Initial raw material TiCl 4 , Zn 3 (C 6 h 5 o 7 ) 2 2H 2 O, Mg(NO 3 ) 2 ·6H 2 O according to the general formula Ti 0.6 Mg 0.3 Zn 0.1 o 1.6 Weighing; the antioxidant is selected from tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester.
[0030] Process step is with embodiment 1.
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Abstract
According to a preparation method for nano-modified polypropylene anti-aging special material, composite nano oxide powder is coated by SiO2, the catalysis and degradation of nano-powder on polypropylene materials can be lowered effectively, at the same time, graft modification is conducted on the surface of the composite nano oxide powder by polyethylene glycol terephthalate, and the dispersity of the composite nano oxide powder in organic polymer matrix is improved. The polypropylene anti-aging special material is modified by the composite nano oxide powder of which surface is modified, a good mechanical strength, processability and ageing resistance are achieved, the notch impact strength tops above 39Kj / m2, the non-notch impact strength tops above 64kJ / m2, the non-notch impact strength can still keep over 55Kj / m2 when aging is accelerated by ultra violet light for 200 h, and the non-notch impact strength can still keep over 45Kj / m2 after being exposed in the ultra violet light for 700 h.
Description
technical field [0001] The invention relates to a preparation method of a polypropylene anti-aging special material, in particular to a preparation method of a nano-modified polypropylene anti-aging special material. Background technique [0002] Polypropylene (PP) is one of the five general-purpose plastics, and its output ranks third after PE and PVC. Polypropylene is rich in sources and low in price; it has the advantages of excellent mechanical properties, good electrical insulation and stress crack resistance, and also has good chemical stability, easy molding and processing, and can be used in various methods such as injection, extrusion and hollow molding. , can be made into a variety of products efficiently. However, polypropylene has the following disadvantages: 1) The side methyl group on the molecular chain reduces the flexibility of the chain, and the spherulite particles are large, making it brittle, poor in impact resistance, and insufficient in high temperatu...
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