Article
  • Foam Extrusion of Rigid PVC. I. Effect of Decomposition Mode of Chemical Blowing Agent on the Foaming Characteristics and Foam Properties
  • Kim BC, Kim KU, Hong SI
  • 경질 PVC의 발포압출 I. 화학발포제의 분해양상이 발포특성과 발포체의 물성에 미치는 영향
  • 김병철, 김광웅, 홍성일
Abstract
Two chemical blowing agents with different decomposition mode, azodicarbonamide (ADCA) and sodium bicarbonate (SBC), were selected, and foaming process of rigid poly (vinyl chloride) (PVC) was investigated. At the same usage level, ADCA gave higher degrees of nucleation and growth of microbubble than SBC. Further, the decomposition mode and gas properties had a profound influence on foaming process and foam properties. ADCA exhibited high initial bubble expanding rate under ambient pressure and yielded almost round to elliptical cells with even size distribution, while SBC required some induction time for bubble expansion and yielded irregularly shaped cells with wide size distribution. Of the two chemical blowing agents, ADCA yielded foams with better mechanical properties than SBC.

Keywords:

  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 1986; 10(2): 143-150

    Published online Apr 25, 1986

  • 10.7317/pk.
  • Received on Nov 30, -0001
  • Revised on Nov 30, -0001
  • Accepted on Nov 30, -0001

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