서지주요정보
파라하이드록시벤조산을 포함하는 열방성 액정 폴리에스터이미드의 합성 및 물성에 관한 연구 = Synthesis and properties of thermotropic liquid crystalline poly (ester-imide)s with p-hydroxybenzoic acid
서명 / 저자 파라하이드록시벤조산을 포함하는 열방성 액정 폴리에스터이미드의 합성 및 물성에 관한 연구 = Synthesis and properties of thermotropic liquid crystalline poly (ester-imide)s with p-hydroxybenzoic acid / 박기석.
저자명 박기석 ; Park, Ki-Seok
발행사항 [대전 : 한국과학기술원, 1995].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8005803

소장위치/청구기호

학술문화관(문화관) 보존서고

MCHE 95020

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

초록정보

The new thermotropic liquid crystalline copoly(ester-imide)s were synthesized by a melt polymerization. The molar ratio of N-(ω-carboxyalkylene) trimellitic imide and 2,6-diacetoxynaphthalene was kept constant at 1:1, but the molar ratio of p-acetoxybenzoic acid to these two monomers was varied from 0.5:1 to 5:1. These thermotropic liquid crystalline copoly(ester-imide)s turned out to have a low melting temperature(or solidification temperature), a wide nematic range from the melting temperature(or solidification temperature), and thermally stable until reaching 400℃. The rheological properties of the polymers were studied by PHYSICA rheometer. Dynamic viscoelastic properties for the polymers with X=0.5 and X=1 showed no hysteresis behaviors in a temperature cycle. But, the sample with X=2 showed the hysteresis behavior in the cooling measurement. This might be caused by the formation of HBA block units in the main chain. This result was consistent with the results of WAXD patterns and SEM photographs. The mechanical properties of thermotropic liquid crystalline copoly(ester-imide) fibers showed that the tensile strength increased with increasing draw ratio.

서지기타정보

서지기타정보
청구기호 {MCHE 95020
형태사항 viii, 77 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Ki-Seok Park
지도교수의 한글표기 : 정인재
지도교수의 영문표기 : In-Jae Chung
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 73-77
주제 Polymer liquid crystal.
Polymerization.
Rheology.
고분자 액정. --과학기술용어시소러스
중합. --과학기술용어시소러스
물리적 성질. --과학기술용어시소러스
QR CODE qr code