Article
  • Effect of Comonomer Composition and Content on the Polymerization and Thermal Behavior of Polyacrylonitrile-Based Carbon Fiber Precursors

  • Ji-Young Noh, Yun-Su Kuk*, Tae-Eun Kim, Sung-Ryong Kim*, Ki-Young Kim**, Jung-Hyurk Lim† , and Kyung-Min Kim†

  • Department of Polymer Science and Engineering/Department of IT-Energy Convergence (BK21 PLUS), Korea National University of Transportation, Chungju, Chungbuk 27496, Korea
    *Korea Carbon Industry Promotion Agency 111, Jeonju, Jeonbuk 54852, Korea
    **Department of Textile Convergence of Biotechnology & Nanotechnology, Korea Institute of Industrial Technology, Ansan, Gyeonggi 15588, Korea

  • 공단량체의 조성과 함량이 폴리아크릴로니트릴계 탄소섬유 전구체의 중합 및 열적 거동에 미치는 영향

  • 노지영 · 국윤수* · 김태은 · 김성룡* · 김기영** · 임정혁† · 김경민†

  • 한국교통대학교 나노화학소재공학전공/BK21 친환경 스마트 미래교통 연구단, *한국탄소산업진흥원, **한국생산기술연구원 바이오나노섬유융합연구원

  • 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

Polyacrylonitrile (PAN) co- or terpolymers as carbon fiber precursor were successfully synthesized with high yield using methyl acrylate (MA), itaconic acid (IA) or acrylic acid (AA) as comonomers via conventional solution polymerization according to the different composition and weight ratio. The chemical structure, intrinsic viscosity, viscosity average molecular weight of PAN polymers were determined by proton nuclear magnetic resonance (1H NMR) and ubbelohde viscometer. The structure change of PAN polymers derived from cyclization and dehydrogenation reaction during thermal oxidative stabilization depending on the different thermal treatment temperature was characterized by Fourier transform infrared spectroscopy (FTIR) and the cyclization reaction index was used to check out the effect of comonomer composition and weight ratio on the cyclization reaction of PAN polymers. The initial cyclization temperature, efficiency of cyclization reaction, and char yield of PAN polymers were analyzed by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA).


탄소섬유 전구체로 폴리아크릴로나이트릴(PAN)계 중합체를 공단량체로 중성계 모노머인 methyl acrylate와 산성계 모노머인 itaconic acid 또는 acrylic acid를 사용하여 서로 다른 조성과 함량으로 용액중합을 통하여 높은 수율로 제조하였다. PAN 중합체의 화학구조, 고유점도 및 분자량은 핵자기 공명 분광기(1H NMR), 우벨로오드 점도계로 확인하였고, 퓨리에 변환 적외선 분광기(FTIR) 분석 및 고리화 반응지수를 통하여 열처리 온도에 따른 열산화 안정화 과정에서 일어나는 고리화 반응과 탈수소화 반응에 의한 PAN 중합체의 구조변화와 공단량체의 함량과 조성이 고리화 반응에 미치는 영향을 관찰하였고, 열산화 안정화 과정에서 PAN 중합체의 고리화 개시온도 및 개시효율과 탄소 잔존량은 시차 주사 열량계(DSC)와 열 중량 분석기(TGA)를 통해 확인하였다.


Keywords: polyacrylonitrile, carbon fiber precursor, efficieny of cyclization reaction, thermal oxidative stabilization.

  • 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

  • 2021; 45(5): 793-802

    Published online Sep 25, 2021

  • 10.7317/pk.2021.45.5.793
  • Received on May 27, 2021
  • Revised on Jul 8, 2021
  • Accepted on Jul 8, 2021

Correspondence to

  • Jung-Hyurk Lim and Kyung-Min Kim

  • Department of Polymer Science and Engineering/Department of IT-Energy Convergence (BK21 PLUS), Korea National University of Transportation, Chungju, Chungbuk 27496, Korea

  • E-mail: jhlim@ut.ac.kr, kmkim@ut.ac.kr