Article
  • Effect of Homo Polypropylene Having Low Melt Viscosity on Processing Characteristics and Structural Development of Random Polypropylene Films
  • Tao Zhang, Donghyun Lee, and Ho-Jong Kang

  • Department of Polymer Science and Engineering, Dankook University, Gyeonggi-do 448-701, Korea

  • 저점도 호모 폴리프로필렌 첨가가 랜덤 폴리프로필렌 필름 가공 특성과 구조 형성에 미치는 영향
  • 장타오 · 이동현 · 강호종

  • 단국대학교 고분자공학과

Abstract

The homo polypropylene (PP) was used to enhance the processability of melt casting random PP film. Increase of processability in melt casting random PP film was found by the lowering of melt viscosity and increase of activation energy due to the addition of homo PP having low melt viscosity. It was found that high crystallinity of homo PP resulted in the improvement of thermal property and crystallinity in the random PP film. The smooth film surface was obtained because the addition of homo PP caused the lowering of crystalline size during the solidification. This morphological changes affect both the orientation behavior and crystallinity of PP films in the drawing process. As a result, mechanical properties were improved dramatically in drawn PP films.


용융캐스팅 폴리프로필렌 필름의 가공성 향상을 위하여 호모 폴리프로필렌이 사용되었다. 저점도 호모 폴리프로필렌을 첨가함에 따라 랜덤 폴리프로필렌의 점도가 감소하고 activation energy가 증가함에 따라 필름 가공성이 향상됨을 알 수 있었다. 고결정성 호모 폴리프로필렌 첨가에 의하여 필름의 열적 특성과 결정화도가 증가되었고 고상화 과정에서 상대적으로 작은 크기의 결정 생성에 의하여 표면 거칠기는 낮아짐을 확인하였다. 이러한 형태학적 변화는 필름 배향 및 결정화에 영향을 주며 그 결과, 연신 필름에서 결정화도와 기계적 특성이 크게 향상됨을 확인할 수 있었다.


Keywords: homo polypropylene, random polypropylene, processability, crystallinity, orientation

  • 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

  • 2018; 42(6): 954-959

    Published online Nov 25, 2018

  • 10.7317/pk.2018.42.6.954
  • Received on Apr 11, 2018
  • Revised on Apr 30, 2018
  • Accepted on Jul 9, 2018

Correspondence to

  • Ho-Jong Kang
  • Department of Polymer Science and Engineering, Dankook University, Gyeonggi-do 448-701, Korea

  • E-mail: hjkang@dankook.ac.kr