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Synthetic method for fiber-forming polymer

A technology of fiber-forming polymers and synthesis methods, applied in the direction of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problem of increased particle size of polymerization products, easy adhesion on the wall of the kettle and On the stirring paddle, problems such as the stickiness of droplets and the stickiness of products and lumps were not taken into account

Active Publication Date: 2015-06-24
TIANJIN POLYTECHNIC UNIV
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Problems solved by technology

When the above-mentioned documents adopt the suspension polymerization method to synthesize fiber-forming (meth)acrylate polymers, polyvinyl alcohol (PVA) is mostly used as a dispersant, which has the following problems: 1. PVA is a hydrophilic substance, and (meth)acrylic acid Ester monomers are lipophilic substances, and the affinity between PVA and monomers is extremely poor. In this case, PVA can only stabilize droplets by increasing the viscosity of the water phase, but cannot be adsorbed in the suspension system. The surface of the monomer droplet in the medium, so the droplet can only be stabilized in a single way; ②The stabilization effect is extremely unsatisfactory. In the early stage of the reaction, the suspended droplet is easy to stick and form a large droplet, and the too large droplet makes the monomer unable to react completely. , a small amount of monomer remains in the polymerization product particles, which affects the performance of the polymer. The products in the middle and late stages of the reaction are very easy to stick together, which makes the particle size of the polymerization product larger. The polymerization kettle must be cleaned, and the polymer block must be crushed before spinning, which interferes with the subsequent process and increases the cost of manpower and material resources
In addition, when the above-mentioned documents adopt the suspension polymerization method to synthesize fiber-forming (meth)acrylate polymers, even if the second and third monomers are used, the second and third monomers are still lipophilic monomers. The second and third monomers are only used to improve the adsorption capacity of the finished fiber to different organic substances, without taking into account the adhesion of droplets at the initial stage of polymerization, the adhesion and agglomeration of products in the middle and late stages of polymerization, and the adhesion of products to the walls of kettles and stirring paddles, etc. question

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  • Synthetic method for fiber-forming polymer
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preparation example Construction

[0021] The synthesis method (hereinafter referred to as the synthesis method) of (meth)acrylic ester polymer (polymer for short) with excellent fiber-forming performance designed by the present invention comprehensively and simultaneously utilizes auxiliary dispersion and suspension polymerization methods, aiming to solve the problem of traditional suspension polymerization methods The problem that exists when synthesizing this class polymer, its technological process or step are as follows:

[0022] (1) Monomer phase preparation process: measure 100-1600ml (meth)acrylate monomer (referred to as the first monomer), and place it in a large container equipped with magnetic stirring; and the second monomer of the amphiphilic group, so that the mass ratio of the (meth)acrylic ester monomer is 0.1:99.9 to 10:90, and it is placed in the above-mentioned large container; 0.1% to 1% by weight of the initiator of the total mass of the monomer and the second monomer, and pour it into the...

Embodiment 1

[0035]Measure 150ml of n-butyl methacrylate monomer, and place it in a large container equipped with magnetic stirring, weigh the initiator benzoyl peroxide that accounts for 0.5wt% of the total mass of n-butyl methacrylate monomer (0.6712g), and it is poured in the above-mentioned container, start magnetic stirring, initiator is dissolved in the above-mentioned monomer completely, stop stirring, measure deionized water (450ml), make its volume equal to the total volume of the above-mentioned monomer The ratio is 3: 1, and it is placed in another large container equipped with magnetic stirring and heating system, and the dispersant (2.25g) that accounts for 0.5wt% of the total mass of deionized water is weighed, and it is placed in the above-mentioned deionized water After soaking in deionized water for 24 hours, start the magnetic stirring and heating system to completely dissolve the dispersant in deionized water, stop stirring and heating, cool the above mixed system to room...

Embodiment 2

[0037] Measure 145.56ml n-butyl methacrylate monomer, and place it in a large container equipped with magnetic stirring, measure acrylic acid (6.44ml), so that its mass ratio with n-butyl methacrylate monomer is 5:95, and it is placed in the above-mentioned large container, takes by weighing the initiator benzoyl peroxide (0.6852g) that accounts for 0.5wt% of the total mass of the above-mentioned monomers, and pours it into the above-mentioned container, and starts magnetic stirring , the initiator is completely dissolved in the above-mentioned monomers, the stirring is stopped, and deionized water (450ml) is measured so that its volume and the total volume ratio of the above-mentioned monomers are 3:1, and it is placed in another tank equipped with magnetic stirring. And in the large container of heating system, take by weighing the dispersant (2.25g) that accounts for 0.5wt% of deionized water gross mass, it is placed in above-mentioned deionized water, after standing and soa...

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Abstract

The invention discloses a synthetic method for a fiber-forming polymer. The synthetic method comprises the following steps of: taking a first monomer and a second monomer at a weight ratio of (99.9:0.1) to (90:10), weighing initiator which is 0.1wt%-1wt% of the total weight of the monomers, and completely dissolving the initiator in the monomers by stirring; getting deionized water, wherein the volume ratio of the deionized water to the monomers is (1:1) to (5:1), taking a dispersing agent which is 0.1wt%-1wt% of the total weight of the water, stewing and soaking the dispersing agent for 12-48 hours, and completely dissolving the dispersing agent in water by heating and stirring; transferring the prepare monomer phase and water phase to a polymeric kettle for being stirred for 20-60 minutes, ventilating nitrogen gas, heating up the polymeric kettle to 70-90 DEG C, increasing the temperature of the polymeric kettle to 90-100 DEG C for continuously reacting for 1-3 hours after the reaction is carried out for 3-5 hours; and stopping the reaction, getting out and filtering the product, washing the product by hot water of 70-100 DEG C and then washing the product by three times by deionized water; and drying the washed product for 24-72 hours under 50-100 DEG C in a vacuum dryer to obtain transparent bead-like fiber-forming polymer.

Description

technical field [0001] The invention relates to a polymer synthesis technology, in particular to a synthesis method of poly(meth)acrylate with excellent fiber-forming properties (can be spun into fibers). The synthesis method comprehensively utilizes auxiliary dispersion and suspension aggregation method. Background technique [0002] With the continuous development of the petroleum industry, the global environmental pollution problem is becoming more and more serious. In 2010, the US Gulf of Mexico and in 2011, the sudden oil spill accident of CNOOC Bohai Bay Pengcai Oilfield brought devastating damage to the ecological environment of relevant waters. In addition The pollution of rivers, lakes, oceans, and air caused by oily low-molecular organic matter and its sewage and waste liquids also has the characteristics of environmental persistence, bioaccumulation, semi-volatility, long-distance migration, and high toxicity. Serious and irreversible harm is urgently needed to b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/14C08F220/18C08F220/06C08F220/56C08F220/28C08F2/20D01F6/36B01J20/26B01J20/28B01J20/30
Inventor 徐乃库肖长发蒋敏管路遥杨超超刘芳屠新昌万锋马肖
Owner TIANJIN POLYTECHNIC UNIV