DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Park, OOk | - |
dc.contributor.advisor | 박오옥 | - |
dc.contributor.author | Nam, Byung Kook | - |
dc.contributor.author | 남병국 | - |
dc.date.accessioned | 2017-03-29T02:45:28Z | - |
dc.date.available | 2017-03-29T02:45:28Z | - |
dc.date.issued | 2016 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=663116&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/222151 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 생명화학공학과, 2016.8 ,[81 p. :] | - |
dc.description.abstract | High-molecular-weight atactic polypropylene (HMW-aPP) was used as the impact modifier in isotactic polypropylene (iPP). HMW-aPP (Mw 315,000 g/mol) was made by using metallocene catalysts, and iPP/HMW-aPP blends were prepared in a twin-screw extruder. The effects of HMW-aPP on the crystalline morphology, and thermal and mechanical properties of iPP were investigated by polarizing microscopy, differential scanning calorimetry, a universal testing machine, and Izod impact tests. The crystallization temperature and crystallinity of the iPP/HMWaPP blends increased compared to that of pure iPP. The HMW-aPP acted as a diluent during the crystallization of the iPP/HMW-aPP blends. These diluent HMW-aPP molecules prevented entanglement of the iPP molecules, which facilitated the crystallization of iPP. The Izod impact strength of the iPP/HMW-aPP blends increased with increasing HMW-aPP content owing to the incorporation of the soft HMW-aPP into the hard iPP. The Izod impact strength of the iPP-80 blend dramatically increased by 680% compared to that of neat iPP. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | polypropylene | - |
dc.subject | atactic polypropylene | - |
dc.subject | Izod impact strength | - |
dc.subject | polymer blend | - |
dc.subject | non isothermal crystallization | - |
dc.subject | 폴리프로필렌 | - |
dc.subject | 어택틱폴리프로필렌 | - |
dc.subject | 충격강도 | - |
dc.subject | 고분자블렌드 | - |
dc.subject | 비등온결정화 | - |
dc.title | A study on isotactic polypropylene/atactic polypropylene blends | - |
dc.title.alternative | 아이소택틱 폴리프로필렌/어택틱 폴리프로필렌 혼합물에 관한 연구 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :생명화학공학과, | - |
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