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Novel method for performing copolymerization reaction of dicyclopentadiene and maleic anhydride

A technology of dicyclopentadiene and maleic anhydride, which is applied in the new field of copolymerization of dicyclopentadiene and maleic anhydride, can solve problems such as narrow particle size distribution, and achieve narrow particle size distribution, easy process control, and controllable appearance. Effect

Inactive Publication Date: 2013-07-03
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And the present invention can prepare maleic anhydride and dicyclopentadiene alternating copolymer microspheres containing reactive anhydride groups. In the dispersion system of such polymer microspheres, the surface of the monodisperse polymer microspheres is clean and the morphology is controllable , the particle size is controllable, and the particle size distribution is narrow, and it can solve the disadvantages caused by the need to use stabilizers in traditional dispersion polymerization systems

Method used

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  • Novel method for performing copolymerization reaction of dicyclopentadiene and maleic anhydride
  • Novel method for performing copolymerization reaction of dicyclopentadiene and maleic anhydride
  • Novel method for performing copolymerization reaction of dicyclopentadiene and maleic anhydride

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Embodiment 1

[0047] The molar ratio of MAn and DCPD is 1:1, in which MAn is 1.2255g and DCPD is 1.6525g; the initiator is AIBN, 0.0328g; the medium is ethyl benzoate and n-hexane, each 25mL. Heated in a water bath and reacted for 6 hours at a temperature of 70°C to obtain DCPD / MAn copolymer microspheres, the average particle diameter (Dn), dispersion coefficient (U) and polymerization conversion rate (C p ), and the number average molecular weight of the polymer The results are shown in Table 1. Scanning electron micrographs of polymer microspheres are shown in figure 1 .

Embodiment 2

[0049] The molar ratio of MAn and DCPD is 1:1, in which MAn is 1.2255g and DCPD is 1.6525g; the initiator is AIBN, 0.0328g; the medium is ethyl formate and n-hexane, each 25mL. Heated in a water bath and reacted for 6 hours at a temperature of 70°C to obtain DCPD / MAn copolymer microspheres, the average particle diameter (Dn), dispersion coefficient (U) and polymerization conversion rate (C p ), and the number average molecular weight of the polymer The results are shown in Table 1.

Embodiment 3

[0051] The molar ratio of MAn and DCPD is 1:1, in which MAn is 1.2255g and DCPD is 1.6525g; the initiator is AIBN, 0.0328g; the medium is ethyl acetate and n-hexane, each 25mL. Heated in a water bath and reacted for 6 hours at a temperature of 70°C to obtain DCPD / MAn copolymer microspheres, the average particle diameter (Dn), dispersion coefficient (U) and polymerization conversion rate (C p ), and the number average molecular weight of the polymer The results are shown in Table 1. .

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Abstract

The invention discloses a novel method for performing a copolymerization reaction of dicyclopentadiene and maleic anhydride, and belongs to the technical field of copolymers. The method comprises the following steps of: under the protection of nitrogen, adding monomers and an initiator into an organic medium and dissolving, reacting for 2 to 12h at the temperature of between 60 and 90 DEG C to obtain a self-stabilizing dispersion system of monodisperse microspheres of an alternating copolymer, and performing centrifugal separation, and drying to obtain a white solid of the dicyclopentadiene / maleic anhydride alternating copolymer, wherein the reaction monomers are the dicyclopentadiene and the maleic anhydride, and the molar ratio of the two monomers is 5:1-1:5; the medium is a mixed solvent of organic acid alkyl ester and organic alkane, and the organic acid alkyl ester accounts for 30 to 70 volume percent of the mixed solvent; and a chemical structure is that: R1 is a hydrogen atom, C1-C5 alkyl, phenyl or benzyl, and R2 is C1-C5 alkyl. A stabilizer and a costabilizer are not required to be added, the reaction system is simple, and a product is easy to separate; and polymer microspheres have smooth and clean surfaces, uniform particle sizes, controllable appearances, and high dispersibility.

Description

technical field [0001] The present invention relates to a kind of new method that dicyclopentadiene (DCPD) and maleic anhydride (MAn) carry out copolymerization reaction, can obtain the copolymer of milky white dicyclopentadiene and maleic anhydride under the condition of not adding any stabilizer Stable dispersion system, the dispersed phase of the system is smooth and clean surface, uniform particle size, controllable particle size and shape, monodisperse polymer microspheres, polymer microspheres are composed of alternating copolymers of dicyclopentadiene and maleic anhydride , belongs to the technical field of copolymers. Background technique [0002] Dicyclopentadiene (DCPD), maleic anhydride (Man) copolymer is a new type of polymer material with low price and high potential value, which is widely used in organic glass additives, latex coatings, plastic product modifiers, and Used to improve the processability of materials and other fields. Among them, dicyclopentadie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F222/06C08F232/08C08F2/14
Inventor 邓建元廖浩东杨万泰
Owner BEIJING UNIV OF CHEM TECH
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