Article
  • Mechanical Properties at Room and Elevated Temperatures According to the Thickness Ratio of Coextruded Film Using Polycarbonate and Acrylic Resin

  • Hyun-Myung Son, Chang-Whan Lee, Seok-Ho Yoon*, Ki-ho Lee*, and Min-Young Lyu†

  • Department of Mechanical Information Engineering, Graduate School of Seoul National University of Science and Technology Gongneung-ro, Nowon-gu, Seoul 01811, Korea
    *I-Components Co., Ltd., 74, Chupalsandan 1-gil, Paengseong-eup, Pyeongtaek-si 17998, Korea

  • 폴리카보네이트와 아크릴 수지를 이용한 공압출 필름의 두께 비에 따른 상온 및 고온의 기계적 물성

  • 손현명 · 이창환 ·윤석호* · 이기호* ·류민영†

  • 서울과학기술대학교 기계정보공학과, *㈜i-components

  • 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 mechanical properties of polycarbonate (PC)/polymethyl methacrylate (PMMA) multilayer films according to temperature were studied. The mechanical properties examined are modulus of elasticity, yield strength, tensile strength, elongation at break and Poisson’s ratio. In a multilayer film with a thickness of 250 μm, the mechanical properties were observed with different thickness ratios. In addition, the mechanical properties in the flow direction and the direction perpendicular to the flow of the co-extrusion process were compared. Properties below the glass transition temperature (Tg) showed high mechanical properties due to molecular orientation in the extrusion direction. In the PC/PMMA multilayer film, a large change in mechanical properties was shown at the Tg of the thick layer material. The higher the temperature, the higher the Poisson’s ratio of the film, but the difference according to the extrusion direction became smaller.


본 연구에서는 polycarbonate (PC)/polymethyl methacrylate (PMMA) 다층필름의 온도에 따른 기계적 물성을 파악하였다. 조사한 기계적 물성은 탄성계수, 항복강도, 인장강도, 파단 연신율 그리고 프와송 비이다. 두께 250 μm의 다층 필름에서 두 소재의 두께 비를 달리하며 물성을 관찰하였다. 또한 공압출 공정의 흐름방향과 흐름 직각방향에서의 물성을 비교하였다. 유리전이온도(glass transition temperature, Tg) 이하에서의 물성은 압출방향으로 분자 배향에 의해 기계적 강도가 크게 나타났다. PC/PMMA 다층 필름에서 두꺼운 층 소재의 Tg에서 큰 물성 변화를 보였다. 온도가 높을수록 필름의 프와송 비는 크게 나타났으나 압출 방향에 따른 차이는 작아졌다.


Keywords: polycarbonate/polymethyl methacrylate film, co-extrusion, mechanical property, poisson’s ratio.

  • 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

  • 2023; 47(6): 757-765

    Published online Nov 25, 2023

  • 10.7317/pk.2023.47.6.757
  • Received on Jul 21, 2023
  • Revised on Aug 9, 2023
  • Accepted on Aug 16, 2023

Correspondence to

  • Min-Young Lyu

  • Department of Mechanical Information Engineering, Graduate School of Seoul National University of Science and Technology Gongneung-ro, Nowon-gu, Seoul 01811, Korea

  • E-mail: mylyu@seoultech.ac.kr