Fusion graft process for modified polypropylene/acrylic acid polyester ether
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A polyether acrylate and melt grafting technology, which is applied in the field of polymer polymerization and processing, can solve the problems of unstable grafting effect, continuous and uniform feeding, etc., and achieve the goals of avoiding early decomposition, improving quality and ensuring process stability Effect
Inactive Publication Date: 2008-12-17
江苏创源科技新材料有限公司 +1
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[0006] The purpose of the present invention is to propose a method that can avoid the slipping phenomenon of the feed and improve the grafting efficiency in view of the defects that the current melt extrusion grafting process of polypropylene and polyether acrylate cannot realize continuous and uniform feeding and the grafting effect is unstable. Improved Efficiency of Polypropylene and Polyether Acrylate Melt Grafting Process
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Embodiment 1
[0023] Mix polypropylene, polyether acrylate monoester, polyether diacrylate diacrylate, initiator TX101, and antioxidant 1010 evenly. The formula is as follows:
[0024] composition
parts by weight
Polypropylene
100
Acrylic polyether monoester
5.0
Diacrylate polyether diester
5.0
TX101
0.1
Antioxidant 1010
0.3
[0025] The preparation process is as follows: 100 parts of polypropylene, 5.0 parts of acrylic acid polyether monoester, 5.0 parts of diacrylic acid polyether diester, 0.1 part of initiator 2,5-dimethyl-2,5 di-tert-butylperoxyhexane (TX101), 0.3 parts of antioxidant (1010) were added to the high-speed disperser and mixed evenly, then added to the hopper of the twin-screw extruder, and carried out the grafting reaction of melt extrusion by co-rotating twin-screw extruder (screw diameter 35) . The temperature of each section of the twin-screw extruder is:
[0026] Zone I Zone II Zone ...
Embodiment 2
[0030] 1) At room temperature, uniformly mix acrylic acid polyether monoester and diacrylic acid polyether diester in a high-speed mixer at a weight ratio of 1:1, and then add the initiator 2,5-dimethyl-2,5 bis-tertiary Butylperoxyhexane (TX101) and antioxidant tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester 1010, so that TX101 and antioxidant 1010 are mixed The weight concentrations in the body are 1% and 3%, respectively.
[0031] 2), heat up the co-rotating twin-screw extruder (screw diameter 35), the temperature of each zone is as follows:
[0032] Zone I Zone II Zone III Zone IV Zone V Zone VI Zone VII Zone VIII Zone Head
[0034] 3) Add polypropylene pellets to the twin-screw extruder through the feeding port for melt extrusion, and the feeding speed is controlled to be 10Kg / hour; at the same time, the mixed monomer solution is fed from the twin-screw extruder through a hig...
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Abstract
The present invention relates to an improved melting grafting method of polypropylene and polyether acrylate, which comprises the following process steps: a) adding polyether acrylate monomers, peroxidation initiators and antioxidants into a high-speed disperser at normal temperature Mix uniformly in the middle to form a mixed solution of grafted monomer and initiator; b) the twin-screw extruder is heated up to the reaction temperature, and the polypropylene resin is passed through the feeder of the twin-screw extruder, with a fixed feeding frequency Add from the feed port; c) at the feed port of the twin-screw extruder mixing section, continuously add the mixed solution of the graft monomer and the initiator by the liquid pump to make the peroxidation initiator, polyether acrylate monomer and react with polypropylene melt in the mixing section of the twin-screw extruder; d) Turn on the vacuum pump at the end of the screw to remove low-molecular matter, and the extruded melt is cooled and pelletized to obtain the final polypropylene / Acrylic polyether ester grafted product. The invention avoids the problem of material slipping at the feeding port of the twin-screw extruder, is beneficial to the grafting reaction, and improves the grafting efficiency.
Description
technical field [0001] The invention relates to an improved melting grafting method of polypropylene and polyether acrylate, belonging to the technical field of polymer polymerization and processing. Background technique [0002] Polypropylene (PP) has a series of excellent properties, such as: low density, low price, chemical corrosion resistance, high mechanical strength, good heat resistance, etc., so it has a wide range of uses and has become the largest and fastest growing thermoplastic general-purpose plastic . However, because it is a non-polar, high-crystallinity polymer, there is a lack of polar reactive groups on the molecular chain, which leads to their poor hydrophilicity, antistatic properties, dyeability, and cohesiveness. To a certain extent, the further application of polypropylene is limited. [0003] The method to improve the antistatic properties of polypropylene is to blend surfactants (organic quaternary ammonium salts, organic sulfonates, etc.) Form ...
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