Article
  • Study on the Crystallization Behavior and Rheological Properties of Nylon 6 /Expanded Graphite Composites

  • Eun Jin Jang* and Youn Cheol Kim†

  • Major in Polymer Science and Engineering, Kongju National University, 1223-34 Cheonan way, Cheonen 31080, Korea
    *Korea Automotive Technology Institute, 303 Pungse-ro, Pungse-myeon, Dongnam-gu, Cheonan-si, Chungnam 31214, Korea

  • 나일론6/팽창흑연 복합체의 결정화 거동 및 유변학적 특성 연구

  • 장은진* · 김연철†

  • 공주대학교 신소재공학부 고분자공학전공, *한국자동차연구원 강소특구연구단

  • 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

A non-isothermal crystallization behavior and dynamic rheological properties were evaluated to examine the effect of expanded graphite (EG) content and fabrication method on the crystallization process and flow properties of nylon 6/EG composite. The melting temperature did not change significantly when EG was added, but the crystallization temperature showed a significant increase. Avrami analysis was performed to analyze crystallization behavior. As the content of EG increased, it was shown that the shear thinning behavior increased along with the increase in the complex viscosity of the nylon 6/EG composite. It is evaluated that it can be processed under conditions similar to nylon 6 during the polymer processing.


나일론6에 팽창 그라파이트(expanded graphite, EG)가 혼합된 나일론6/EG 복합체의 결정화 과정과 흐름성에 미치는 EG 함량 및 복합체 제조방법을 고찰하기 위해 비등온 결정화 거동과 동적유변학적 특성을 평가하였다. EG의 첨가 시 용융 온도는 큰 변화가 나타나지 않았으나, 결정화온도에서는 큰 폭의 증가를 나타내었다. 결정화 거동 분석을 위해 Avrami 분석을 진행하였다. EG의 함량이 증가할수록 나일론6/EG 복합체의 복소 점도 증가와 함께 면찰담화(shear thinning) 현상이 증가함을 보여주었고, 전단 박하의 증가는 높은 전단속도 영역에서 복소점도의 증가 폭을 감소시켜 복합체의 성형 가공 시 나일론6와 유사한 조건에서 가공이 가능할 것으로 평가된다.


Keywords: crystallization, expanded graphite, nylon6, rheological properties, Avrami analysis.

  • 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(2): 164-170

    Published online Mar 25, 2023

  • 10.7317/pk.2023.47.2.164
  • Received on Nov 2, 2022
  • Revised on Dec 23, 2022
  • Accepted on Jan 3, 2023

Correspondence to

  • Youn Cheol Kim

  • Major in Polymer Science and Engineering, Kongju National University, 1223-34 Cheonan way, Cheonen 31080, Korea

  • E-mail: younkim@kongju.ac.kr