Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Study of the Rheological Property Branched and Linear Polycarbonate Blends

분지형과 선형 폴리카보네이트의 블렌드의 유변학적 특성 연구

  • 심창업 (엔씨티 주식회사) ;
  • 김연철 (공주대학교 신소재공학부 고분자공학전공)
  • Received : 2025.09.01
  • Accepted : 2025.09.29
  • Published : 2025.10.10
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Abstract

Polycarbonate (PC) blend samples with linear and branched molecular chain structures were prepared using a twin-screw extruder according to the branched PC content. Capillary viscometry confirmed that shear thinning increased with increasing branched PC content. A dynamic rheometer was used to measure zero shear viscosity, which is closely related to mechanical properties such as impact strength. The impact strength tends to increase up to 20% of the branched PC content and then level off.

선형과 분지형 분자사슬 구조의 폴리카보네이트(polycarbonate, PC) 블렌드 시료를 분지형 PC의 함량별로 이축압출기를 이용하여 제조하였다. 분지형 PC의 함량이 증가할수록 전단박하(shear thinning) 현상이 증가함을 모세관점도계를 이용하여 확인할 수 있었다. 충격강도 등 기계적물성과 관련성이 높은 영점전단점도(zero shear viscosity) 측정을 위해 동적유변측정기를 이용하였다. 분지형 PC의 함량이 20%까지는 충격강도가 증가하는 경향을 나타내지만 20% 이상에서는 거의 일정해지는 결과를 보여주었다.

Keywords

Acknowledgement

이 논문은 환경부의 폐자원에너지화 전문인력 양성사업의 지원으로 연구되었음.

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