서지주요정보
고밀도 폴리에틸렌 (HDPE) 사출성형 제품의 배향분포에 관한 연구 = A study on the orientation distribution in injection molded high density polyethylene
서명 / 저자 고밀도 폴리에틸렌 (HDPE) 사출성형 제품의 배향분포에 관한 연구 = A study on the orientation distribution in injection molded high density polyethylene / 현형수.
저자명 현형수 ; Hyun, Hyung-Soo
발행사항 [서울 : 한국과학기술원, 1986].
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소장정보

등록번호

4103619

소장위치/청구기호

학술문화관(문화관) 보존서고

MCE 8634

휴대폰 전송

도서상태

이용가능

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반납예정일

초록정보

The orientation in the injection molding of high density polyethylene is affected by temperature, each molding cycle time and pressure. Particularly, at the filling stage, the stress results in molecular orientation. Further orientation may occur due to additional inflow of material and the inertial flow of melt elements. Therefore, injection molded articles inevitably contain frozen strains. In consequence, they possess anisotropic mechanical and optical properties. In the present work, in order to see the temperature dependance of the orientation, the measurements of birefringence and X-ray diffraction were performed. At the same time, the packing effect was also investigated by varying the plunger forward time. As was expected, the orientation in the gate area is much greater than the orientation in the end area. It was found that the birefringence pattern shows sharp peak at surface area, and the magnitude of the birefringence value observed for polyethylene is higher than that observed for polystyrene. Increasing the melt temperature, the magnitude of birefringence decrease slightly. On the other hand, raising the mold temperature, the magnitude of birefringence is unchanged. From X-ray diffraction results, the degree of crystallite orientation, as represented by the crystallographic a-axis, increases as the distance from the surface increases. The a-axis distribution appears to be independent of axial distance from the gate.

서지기타정보

서지기타정보
청구기호 {MCE 8634
형태사항 iv, 73 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 수록
저자명의 영문표기 : Hyung-Soo Hyun
지도교수의 한글표기 : 정인재
공동교수의 한글표기 : 우성일
지도교수의 영문표기 : In-Jae Chung
공동교수의 영문표기 : Seong-Ihl Woo
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 65-68
주제 Polymers.
폴리에틸렌. --과학기술용어시소러스
고분자. --과학기술용어시소러스
Polyethylene.
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