Article
  • Accelerated Thermal Aging of Natural Fiber/Polypropylene Composites for Automotive Interior Parts
  • Pyoung-Chan Lee , Chanhyeok Um, Sun Kyoung Jeoung, Youn Ki Ko, Jin Uk Ha, Ju-Yub Lee*, Jae Yong Lee**, Kwang Sup Kim**, and Dong Hyeok Kim***

  • Materials Technology R&D Division, Korea Automotive Technology Institute, Dongnam-gu, Cheonan-si, Chungnam 31214, Korea
    *Reliability R&D Division, Korea Automotive Technology Institute, Dongnam-gu, Cheonan-si, Chungnam 31214, Korea
    **R&D Center, Dukyang Ind. Co. Ltd., 105, Gwanggyo-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16229, Korea
    ***Technical Research Center, Jooeun Tech Co. Ltd., Buk-gu, Ulsan-si 44222, Korea

  • 자동차 내장부품용 천연섬유/폴리프로필렌 복합재료의 가속 열화에 관한 연구
  • 이평찬 · 엄찬혁 · 정선경 · 고윤기 · 하진욱 · 이주엽* · 이재용** · 김광섭** · 김동혁***

  • 한국자동차연구원 소재기술연구본부, *한국자동차연구원 신뢰성연구본부, **덕양산업㈜ 선행연구팀, ***주은테크㈜ 기술연구소

  • 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, lifetime prediction of natural fiber/polypropylene (NFPP) composites for automotive door trim was investigated using an accelerated aging test. Accelerated lifetime prediction was the key technology to assure the reliability of automotive components. The accelerated thermal aging test was performed at the temperature of 110, 130, and 150 ℃. As a result of thermal analysis according to the thermal aging temperature, it was confirmed that the thermal decomposition temperature was lowered and the thermal decomposition rate was increased. The measured tensile strengths as a function of thermal aging temperature were used as accelerated lifetime prediction data for the analysis of the NFPP composites lifetime. The lifetime of the NFPP composite was estimated using the Arrhenius-Weibull distribution model. The estimated results exhibited that the B1 lifetime of the NFPP composites was 684 million hours at room temperature (23 ℃) and 39.2 thousand hours at 80 ℃, respectively.


본 연구에서는 자동차 내장 도어 트림용 천연섬유/폴리프로필렌(NFPP) 복합재료의 수명 예측에 관하여 연구하였다. 가속수명예측은 자동차 부품의 신뢰성을 확인하는 핵심 기술이다. 가속 열화 시험은 사용 온도보다 높은 온도인 110, 130, 및 150 oC에서 수행하였다. 노화 온도에 따른 열분석 결과, 열분해 온도는 낮아지고 열분해 속도는 빨라지는 것을 확인하였다. 노화 온도 및 시간에 따른 인장강도는 가속 수명 예측 모델 분석에 활용하였다. NFPP 복합재료의 수명 예측은 아레니우스-와이블 분포 모델을 활용하여 예측하였다. NFPP 복합재료의 B1 수명 예측 결과 상온(23 oC)에서 684백만 시간, 80 oC에서 39.2천 시간을 나타내었다.


Keywords: accelerated aging test, lifetime prediction, natural fiber, Arrhenius-Weibull model, automotive.

  • 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

  • 2021; 45(6): 922-926

    Published online Nov 25, 2021

  • 10.7317/pk.2021.45.6.922
  • Received on Jul 21, 2021
  • Revised on Aug 1, 2021
  • Accepted on Aug 10, 2021

Correspondence to

  • Pyoung-Chan Lee
  • Materials Technology R&D Division, Korea Automotive Technology Institute, Dongnam-gu, Cheonan-si, Chungnam 31214, Korea

  • E-mail: pclee@katech.re.kr