Article
  • Preparation of Poly(AA-co-DVB) Microgels in Crosslinked Polymer by Precipitation Polymerization
  • Kim KS, Kim YJ, Park MH, Keum KM
  • 가교중합체내에서 침전중합에 의한 Poly(AA-co-DVB) Microgel의 합성
  • 김공수, 김영준, 박명환, 금기문
Abstract
The preparation of pure microgel was investigated by a new method which restricts the intermolecular crosslinking reaction between the second stage crosslinked polymer by steric hindrance of the first stage crosslinked polymer. The second crosslinked polymer were prepared by precipitation polymerization of acrylic acid and divinylbenzene in first stage poly(St-co-DVB) crosslinked polymers highly swollen in benzene. Poly(AA-co-DVB) microgels were obtained by ultrasonic degradation of the second stage crosslinked polymer. It was found that the poly(St-to-DVB) crosslinked polymer having large size was selectively scissored according to the increasing ultrasonic degradation time, and that ultrasonic degradation of the compact and small sized poly(AA-co-DVB) microgels was very difficult. Diameters of the small and compact microgels obtained by the ultrasonic degradation were around 40∼90 nm, and the number average molecular weights of the microgels varied from 2.67×106 to 2.43×108. It was possible to obtain a various particle size of the microgels by controlling the crosslinking density of the first stage crosslinked polymer.

1단계 가교중합체의 입체장애에 의해 분자간 가교반응을 제어하는 새로운 방법으로 벤젠에 팽윤된 가교중합체, poly(St-co-DVB)내에서 아크릴산과 디비닐벤젠을 침전중합하여 얻어진 2단계 가교중합체를 분해하여 poly(AA-co-DVB) microgel을 얻었다. Poly(St-co-DVB) 가교중합체가 초음파 조사시간에 따라 우선적으로 절단되었으며 조밀하고 작은 poly(AA-co-DVB) microgel의 직경은 40∼90nm 범위이었고, 분자량은 2.67×106∼2.43×108정도를 나타내었으며, 1단계 가교중합체의 가교밀도에 따라 microgel의 입자 크기의 조절이 가능하였다.

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 1994; 18(1): 14-22

    Published online Jan 25, 1994