Article
  • Study on the Physical Properties of Rigid Polyurethane Foam via Phenolic Resin-Based Prepolymer
  • Hyo-Jeong Song and Sang-Bum Kim

  • Department of Chemical Engineering, Kyonggi University, 154-42, Gwanggyosan-ro, Yeontong-gu, Suwon 16227, Korea

  • 페놀 수지 기반 프리폴리머를 이용한경질 폴리우레탄 폼의 물성 연구
  • 송효정 ·김상범

  • 경기대학교 화학공학과

  • Reproduction, stored in a retrieval system, or transmitted in any form of any part of this publication is permitted only by written permission from the Polymer Society of Korea.

Abstract

In this study, the thermal and mechanical properties of rigid polyurethane foam using a phenolic resin-based prepolymer and NCO index were analyzed. Phenolic resin based polyurethane prepolymer (PRPUP) were synthesized using resol-type phenolic resin and polymeric 4,4-methylene diphenyl isocyanate (PMDI) and then confirmed using FTIR. Heat resistance were measured using thermogravimetric analysis (TGA), and flame retardancy were measured by limited oxyzen index (LOI) and UL 94 V test and residual amount after combustion experiment. Universal testing machine (UTM) and scanning electron microscopy (SEM) were used to measure compressive strength and pore size distribution, respectively. Phenolic resin based polyurethane foam (PRPUF) synthesized using PRPUP increased both heat resistance and flame retardancy. PRPUF24/300 confirmed that the weight lost by combustion after the combustion experiment was 1/4 compared to polyurethane foam, and the flame retardancy was very increased. As the content of PRPUP increased, the pore size increased, and as a result, the compressive strength decreased. As a result of the study, it was confirmed that heat resistance and flame retardancy of polyurethane foam can be improved when using a phenol resin-based prepolymer.


본 연구에서는 페놀 수지 기반 이소시아네이트 프리폴리머(PRPUP)와 NCO index에 따른 경질 폴리우레탄 폼의 열적 특성과 기계적물성 변화를 고찰하였다. PRPUP는 레졸형의 페놀 수지와 polymeric 4,4-methylene diphenyl isocyanate(PMDI)를 사용하여 합성한 후 푸리에 변환 적외선 분광기를 사용하여 확인하였다. 내열성은 열중량분석기를 사용하여 측정하였고, 난연성은 제한산소지수와 UL 94 V test 및 연소실험 후 잔존량을 측정하여 확인하였다. 압축강도 측정과 기공크기 및 분포를 확인하기 위해 만능시험기와 주사전자현미경을 각각 사용하였다. PRPUP를 사용하여 합성한 페놀 수지 기반 폴리우레탄 폼(PRPUF)의 내열성과 난연성은 모두 증가함을 확인하였다. PRPUF24/300은 연소 실험 후 연소에 의해 감량된 무게가 폴리우레탄폼에 비해 1/4로 난연성이 매우 증가함을 확인하였다. PRPUP의 함량이 증가함에 따라 기공크기가 증가하였고 이로인해 압축강도는 감소하였다. 본 연구를 통해 페놀 수지 기반 프리폴리머를 사용하는 경우 내열성 및 난연성을 향상시킬 수 있음을 확인하였다.


Keywords: phenolic resin based prepolymer, polyurethane foam, thermal resistance, flame retardancy.

  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2020 Impact Factor : 0.493
  • Indexed in SCIE

This Article

  • 2022; 46(2): 266-274

    Published online Mar 25, 2022

  • 10.7317/pk.2022.46.2.266
  • Received on Dec 13, 2021
  • Revised on Jan 29, 2022
  • Accepted on Jan 26, 2022

Correspondence to

  • Sang-Bum Kim
  • Department of Chemical Engineering, Kyonggi University, 154-42, Gwanggyosan-ro, Yeontong-gu, Suwon 16227, Korea

  • E-mail: ksb@kyonggi.ac.kr