Article
  • Mechanical and Flame Retardant Properties of SAN Coated PC/PTFE Composite
  • Dong In Choi, Young Sil Lee*, Kwan Han Yoon , Soo Wan Kim**, and Doo Han Ha**

  • Dept. of Chemical Engineering, Kumoh National Institute of Technology, 1 Yangho-dong, Gumi 39177, Korea
    *Industry-Academic Cooperation Foundation, Kumoh National Institute of Technology, 1 Yangho-dong, Gumi 39177, Korea
    **Hannanotech Co., Ltd., 1330, Daedeok-daero, Daedeok-gu, Daejeon 34326, Korea

  • SAN으로 코팅된 PC/PTFE 복합체의 기계적 물성 및 난연특성
  • 최동인 · 이영실* · 윤관한 · 김수완** · 하두한**

  • 금오공과대학교 화학공학과, *금오공과대학교 산학협력단, **한나노텍

Abstract

Core-shell structured SAN-PTFE composites were prepared by grafting styrene and acrylonitrile copolymer (SAN) onto the surface of polytetrafluoroethylene (PTFE) and compounded with polycarbonate (PC) using co-rotating twin extruder. Coating thickness of the shell decreased with decreasing of initiator and increasing of PTFE content, and increased with the polymerization time of SAN copolymer. The tensile and impact strength of PC/SAN-PTFE (8.3 phr) composite were 57 MPa and 48 J/m, respectively, which are similar values of PC. The tensile modulus of the composite was rather 7% higher than that of PC. However, the tensile strength and modulus of PC/PTFE composite were lower than those of PC while the impact strength of PC/PTFE was maintained as almost same value of PC. The limiting oxygen index (LOI) of PC/SAN-PTFE composite containing 8.3 phr of PTFE was determined to be 28.1%.


연구에서는 스티렌(styrene)과 아크릴로니트릴(acrylonitrile)을 공중합하여 형성된 SAN을 폴리테트라플루오로에틸렌(PTFE) 입자의 표면에 코팅하여 core-shell 구조를 갖는 SAN-PTFE 나노 입자를 제조한 후 이를 폴리카보네이트(PC)에 분산시키기 위해 압출기를 이용하여 복합체를 제조하였다. SAN 중합용 개시제의 함량이 줄어들면 PTFE에 코팅된 SAN의 두께가 감소하였고 중합 시 PTFE의 함량을 늘려주면 역시 SAN 코팅 두께가 감소하였으며, 중합시간을 늘려주면 코팅 두께는 증가하였다. PTFE 8.3 phr을 함유하는 PC/SAN-PTFE 복합체의 경우 인장강도와 충격강도는 PC와 같은 57 MPa과 48 J/m이 얻어졌고 인장탄성률은 오히려 PC보다 7% 증가하였다. 그러나 PTFE를 포함하는 PC/PTFE 복합체의 경우는 충격강도를 제외하고 인장강도와 인장탄성률 모두 PC의 값보다 감소하였다. PTFE 8.3 phr을 함유하는 PC/SAN-PTFE 복합체의 한계산소지수(LOI)는 28.1%를 나타내었다.


Keywords: styrene and acrylonitrile copolymer, polytetrafluoroethylene, core-shell structure, mechanical properties, limiting oxygen index

  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2018 Impact Factor : 0.500
  • Indexed in SCIE

This Article

  • 2020; 44(6): 747-752

    Published online Nov 25, 2020

  • 10.7317/pk.2020.44.6.747
  • Received on Feb 3, 2020
  • Revised on Jul 8, 2020
  • Accepted on Jul 19, 2020

Correspondence to

  • Kwan Han Yoon
  • Dept. of Chemical Engineering, Kumoh National Institute of Technology, 1 Yangho-dong, Gumi 39177, Korea

  • E-mail: khyoon@kumoh.ac.kr