Article
  • Thermal and Mechanical Properties of Polypropylene/Cellulose Nanofiber Composites
  • Hyeok Jun Yoon, Bo Min Gil, Jong Hyeok Lee, Jeong Eun Park, Jonghwi Lim, Myeong Jun Jo*, KyungHo Jung**, and Jeong Jae Wie

  • Department of Polymer Science and Engineering, Inha University, 100 Inha-ro, Michuhol-gu, Incheon 22212, Korea
    *Department of Chemical Engineering, Inha University, 100 Inha-ro Michuhol-gu, Incheon 22212, Korea
    **Advanced Material Team, Materials & Devices Advanced Research Institute, LG Electronics Inc., Bldg W1, LG Science Park, 10, Magokjungang 10-ro, Gangseo-gu, Seoul 07796, Korea

  • 폴리프로필렌/셀룰로오스 나노 섬유 복합체의 열적 및 기계적 물성
  • 윤혁준 · 길보민 · 이종혁 · 박정은 · 임종휘 · 조명준* · 정경호** · 위정재

  • 인하대학교 고분자공학과, *인하대학교 화학공학과, **LG 전자

Abstract

Recently, one of the most abundant natural polymers in the earth, cellulose has been studied in various fields. In this study, polymer composites were produced through introduction of cellulose nanofiber (CNF) into polypropylene (PP) which is one of the most commercially utilized polymer for enhanced mechanical properties. Also, maleic anhydride polypropylene (MAPP) was added to PP/CNF composites for compatibility improvement between non-polar PP and polar CNF. Both tensile strength and flexural strength were increased with the addition of CNF, but, on the other hand, impact strength was decreased. As a result of SEM analysis, the interaction between PP/MAPP matrix and CNF was created, and the tensile and flexural stress were influenced by the interaction between PP/MAPP matrix and CNF. Impact stress confirmed that it decreases by pore and stress concentration by CNF. The TGA analysis confirmed that composites are thermally unstable by CNF. Therefore, as CNF contents increased, the initial and final decomposition temperature of the composites are decreased. We also observed increase of porosity because of bound water in the case of high CNF contents.


최근, 가장 풍부한 천연고분자 중 하나인 셀룰로오스를 사용하기 위해 제지산업, 분리막, 보강재 등에 대한 연구가 진행되고 있다. 본 연구에서는 소비자 포장재, 자동차 산업 등 산업에서 가장 많이 쓰이고 있는 플라스틱 중 하나인 폴리프로필렌(polypropylene, PP)의 기계적 물성을 증가시키기 위해 셀룰로오스 나노 섬유(cellulose nanofiber, CNF)를 사용해 복합체를 제조했다. 무극성인 폴리프로필렌에 극성인 CNF를 분산시키기 위해 무수말레인산 폴리프로필렌(maleic anhydride polypropylene, MAPP)을 상용화제로 첨가했다. CNF가 첨가되면서 인장강도와 굴곡강도는 크게 향상됐으며 충격강도는 감소했다. SEM 분석 결과 PP/MAPP 매트릭스와 CNF 사이의 상호작용이 확인됐고 인장강도와 굴곡강도는 매트릭스와 CNF 간의 상호작용이 크게 작용해 증가한 반면 충격강도는 기공과 CNF로 인한 응력집중에 의해 감소함을 확인했다. TGA 분석결과 CNF가 열적으로 불안정하기 때문에 CNF의 함량이 증가할수록 복합체의 열적 안정도는 낮아졌다. 또한 높은 함량의 CNF 샘플에서 결합수로 인해 기공이 증가하는 현상을 관측했다.


Keywords: polypropylene, cellulose nanofiber, polymer composite, mechanical property, interfacial adhesion

  • 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(3): 255-263

    Published online May 25, 2020

  • 10.7317/pk.2020.44.3.255
  • Received on Nov 12, 2019
  • Revised on Jan 9, 2020
  • Accepted on Feb 11, 2020

Correspondence to

  • Jeong Jae Wie
  • Department of Polymer Science and Engineering, Inha University, 100 Inha-ro, Michuhol-gu, Incheon 22212, Korea

  • E-mail: wie@inha.ac.kr