Preparation method of acrylate polymer/nanometer silicon dioxide composite particles for polycarbonate toughening

A nano-silica and acrylate technology, which is applied in the field of preparation of acrylate polymer/nano-silica composite particles for polycarbonate toughening, can solve the problem of poor processing performance and decreased tensile strength of blends, etc. problems, to achieve the effect of good low temperature resistance, improved conversion rate and simplified post-treatment process

Active Publication Date: 2016-03-23
HEBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to aim at the need to add more than 10% rubber elastomer modifier to the toughening of polycarbonate matrix resin at present, just can make its notched impact strength reach the use requirement, this will reduce the tensile strength of polycarbonate by 15% % or more, the processing performance of the blend deteriorates, and a method for preparing polycarbonate toughening acrylate polymer / nano silica composite particles is provided

Method used

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  • Preparation method of acrylate polymer/nanometer silicon dioxide composite particles for polycarbonate toughening
  • Preparation method of acrylate polymer/nanometer silicon dioxide composite particles for polycarbonate toughening
  • Preparation method of acrylate polymer/nanometer silicon dioxide composite particles for polycarbonate toughening

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Embodiment 1

[0043] a. Pre-emulsification of seed monomer

[0044] First, add 0.71g of anionic emulsifier sodium dihexyl adipate sulfonate and 150g of deionized water into a 500ml four-neck flask, and mix and stir for 30 minutes; then add 15g of 2-ethyloctyl acrylate to the reactor The monomer and 0.04g of cross-linking agent 1,4-butanediol diacrylate were placed on an electromagnetic stirrer and stirred for 20 minutes to obtain a seed monomer pre-emulsion for later use;

[0045] b. Pre-emulsification of monomers in the growth phase of the nuclear layer

[0046] Add 1.81g anionic emulsifier dihexyl adipate sodium sulfonate, 145g acrylate-2-ethyloctyl monomer and 0.73g crosslinking agent 1,4-butanediol diacrylate into a 400ml beaker, then Place it on an electromagnetic stirrer and mix and stir for 20 minutes to obtain the second layer of monomer pre-emulsion, which is set aside;

[0047] c. Pre-emulsification of the outer monomer

[0048] Add 0.8g of anionic emulsifier dihexyl adipate so...

Embodiment 2～9

[0078] The other steps are the same as in Example 1, but the changes in the quality of the seed stage emulsifier 1 in step a, step d and the quality of emulsifier 2 used in embodiments 2 to 9 are as shown in Table 1.

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Abstract

The invention provides a preparation method of acrylate polymer/nanometer silicon dioxide composite particles for polycarbonate toughening. According to the method, acrylate polymer emulsion is prepared by selecting emulsifier dosage and nanometer silicon dioxide dosage, utilizing a seeded emulsion polymerization technology, performing preparation of a seed stage elastomer, increase of elastomer particle size and in-situ coating of a plastic outer layer and adjusting an initiator adding mode, then nanometer silicon dioxide pre-emulsion and the acrylate polymer emulsion are mixed evenly, and the acrylate polymer/nanometer silicon dioxide composite particles are obtained through emulsion breaking. A little amount of the composite particles is added into polycarbonate, the toughness of a polycarbonate substrate material can be remarkably improved by adding the acrylate polymer/nanometer silicon dioxide composite particles 1.96%, low-temperature notch impact strength of the composite material is improved by 287% compared with purer polycarbonate, the breaking elongation rate is improved by 298%, and meanwhile the tensile strength is improved by 157%.

Description

technical field [0001] The invention relates to the field of polymer material modification, in particular to a preparation method of acrylate polymer / nano silicon dioxide composite particles for polycarbonate toughening. Background technique [0002] Designing particle morphology and structure to endow materials with special applications is a research hotspot in recent years. There are many methods for multi-layer structure emulsion polymerization particles, polymerization methods such as semi-continuous seed emulsion polymerization, swelling seed polymerization, microemulsion polymerization and other mechanisms. The main advantages of acrylate impact modifiers (ACR) are: good impact modification effect, wide processing temperature range, low shrinkage, and stable product size; The melting and plasticizing time can be shortened, and the molding and processing performance of the blend system can be improved; it also has good weather resistance. Polycarbonate is one of the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F222/14C08F2/26C08K3/36C08L69/00C08L33/08
CPCC08F2/26C08F220/18C08F220/1808C08K3/36C08L69/00C08L33/08C08F222/14
Inventor 瞿雄伟徐晨张广林耿佩佩姚艳梅
Owner HEBEI UNIV OF TECH
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