서지주요정보
폴리우레탄우레아의 미세구조와 물성과의 관계 = Correlation of microstructure and properties in polyurethaneurea
서명 / 저자 폴리우레탄우레아의 미세구조와 물성과의 관계 = Correlation of microstructure and properties in polyurethaneurea / 노경환.
저자명 노경환 ; Rho, Kyeong-Hwan
발행사항 [대전 : 한국과학기술원, 2003].
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소장정보

등록번호

8014050

소장위치/청구기호

학술문화관(문화관) 보존서고

MCBE 03001

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리뷰정보

초록정보

The spandex yarn is very popular in textile industry and most of it is made from polyurethaneurea polymer. In this work, the viscosity and molecular weight increase of polyurethaneurea solution was studied in a view of temperature, raw materials and others. In addition, the phase separation and physical properties of spandex yarn were also studied from hydrogen bonding of urethane and urea group. The polyurethaneurea was made from the reaction of prepolymer and amines(EDA, PDA as chain extender / DEA as chain terminator), and prepolymer from PTMG of molecular weight of 1800 and pure MDI. The viscosity increase of polymer solution in storage process was come from not only chemical reaction of transamidation but also physical force of hydrogen bonding. And, the yarn properties and viscosity of dope were influenced by capping ratio of prepolymer, the kind of chain extender, solid contents of polymer solution and tri-amine contents in chain extender. The phase separation of hard segment and soft segment in polyurethaneurea of spandex yarn is very important in yarn properties, especially modulus and elongation. According to IR study, the degree of phase separation of yarn was measured by the absorption peak of free C=O and hydrogen bonded C=O of urethane. The phase separation was increased by increasing temperature. But, the force of hadrogen bond was decreased. The properties of spandex yarn were measured after heat treatment both in relaxed state and stretched state. After heat treatment in relaxed state, modulus was decreased and elongation was increased by increasing temperature because of good phase separation of hard segment and soft segment. But in 150% stretched state, the properties were opposite because of poor phase separation which come from moving of hard segment at partially oriented state during pre-stretching. Several kinds of yarns were made in dry spinning process by changing spinning conditions. The modulus increased and elongation decreased when lower spinning temperature, higher spinning speed and higher draft ratio beacuse of poor phase separation.

서지기타정보

서지기타정보
청구기호 {MCBE 03001
형태사항 vii, 62 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Kyeong-Hwan Rho
지도교수의 한글표기 : 박오옥
지도교수의 영문표기 : O-Ok Park
학위논문 학위논문(석사) - 한국과학기술원 : 생명화학공학과,
서지주기 참고문헌 : p. 61-62
주제 폴리우레탄우레아
스판덱스
상분리
섬유
탄성사
polyurethaneurea
dope
phase separation
yarn
spandex
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