Copolymerization reaction method for styrene/maleic anhydride

A technology for maleic anhydride and copolymerization, which is applied in the field of styrene/maleic anhydride copolymerization to achieve the effects of controllable morphology, high conversion rate and cost saving

Active Publication Date: 2008-08-06
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The purpose of the present invention is to solve the disadvantages brought by the use of stabilizers in the traditional dispersion polymerization system, and provide a kind of preparation method of self-stabilized styrene / maleic anhydride copolymer colloidal dispersion system

Method used

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  • Copolymerization reaction method for styrene/maleic anhydride
  • Copolymerization reaction method for styrene/maleic anhydride
  • Copolymerization reaction method for styrene/maleic anhydride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The molar ratio of MAn and St is 1:1, wherein MAn is 0.3065g and St is 0.325g; the initiator is azobisisobutyronitrile AIBN, 0.05g; the medium is isoamyl acetate, 45mL. Heating in a water bath and reacting at a temperature of 70° C. for 6 hours to obtain PMS microspheres of maleic anhydride / styrene alternating copolymer. Average particle size (Dn), dispersion coefficient (U) and polymerization yield (C p ), and the number average molecular weight of the polymer The results are shown in Table 1.

Embodiment 2

[0051] The molar ratio of MAn and St is 1:1, where MAn is 0.613g and St is 0.325g; the initiator is AIBN, 0.04g; the medium is isoamyl acetate, 45mL. Adopt water-bath heating, react 6 hours under the temperature of 70 ℃, obtain the average particle diameter (Dn) of PMS copolymer microsphere, dispersion coefficient (U) and polymerization yield (C p ), and the number average molecular weight of the polymer The results are shown in Table 1.

Embodiment 3

[0053] The molar ratio of MAn and St is 1:1, wherein MAn is 1.226g and St is 1.3g; the initiator is AIBN, 0.04g; the medium is isoamyl acetate, 45mL. Adopt water-bath heating, react 6 hours under the temperature of 70 ℃, obtain the average particle diameter (Dn) of PMS copolymer microsphere, dispersion coefficient (U) and polymerization yield (C p ), and the number average molecular weight of the polymer The results are shown in Table 1.

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Abstract

A copolymerization method of phenylethene/maleic anhydride belongs to polymer preparation technical field, for resolving the defect caused by stabilizer in traditional disperse polymerization system, which comprises under nitrogen gas protection, dissolving monomer Man and St, inducer organic hyperoxide or azocompound of suitable ratio in organic acid alkyl ester, the mixture of aromatics and organic acid alkyl ester or the mixture of ketone and alkane to react for 1/4-12h at 60-90 DEG C to obtain the disperse system of polymer microballoon, wherein the average particle diameter of microballoon in the disperse system is 90-1715mm, the disperse factor is 1.04-1.004 and the number average molecular weight is 80000-300000g/mol. The invention has the advantages of eliminated stabilizer, simple process, low cost, clean polymer microballoon or particle surface, controllable particle diameter, controllable shape and narrow granularity distribution.

Description

technical field [0001] The invention relates to a method for copolymerization of maleic anhydride (MAn) and styrene (St), in particular to a method for obtaining a self-stable alternating copolymer dispersion system after copolymerization of MAn and St. Background technique [0002] Styrene (St), maleic anhydride (MAn) copolymer is a new type of polymer material with excellent performance and low price. It is widely used in water treatment agents, latex coatings, adhesive modifiers, and pigment dispersions. agent, emulsifier for floor polishing, emulsifier for pesticide, curing agent for epoxy resin, etc. [0003] In addition, a hot spot in the field of functional polymer materials is the preparation and application of polymer microspheres. Nanoscale to micron-scale polymer microspheres have large specific surface area, strong adsorption, strong coagulation, and strong surface reaction ability. Specific properties, widely used in many high-tech fields such as analytical che...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F222/08C08F2/14
Inventor 邓建元刘振杰杨万泰
Owner BEIJING UNIV OF CHEM TECH
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