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演講快訊
Morphology and Mechanical Behavior of PEEK/PBI Blend
[2017/08/03]
教務
Morphology and Mechanical Behavior of PEEK/PBI Blend

時間

 201783 () 10:00 AM  主持人:吳逸謨 教授

                                      發佈人:陳菊英 助教

 

講者

 Prof. Hung-Jue Sue

 

服務單位

 Department of Materials Science and Engineering, Texas A&M University, USA

 

講題

 Morphology and Mechanical Behavior of PEEK/PBI Blend

 

地點

 創意講堂

 

語言

 English

 

摘要

    The mechanical behavior of polyetheretherketone/polybenzimidazole (PEEK/PBI) blend at 50:50

weight ratio under hygrothermal conditions has been investigated. Severe degradation of the PBI

phase is observed when the blend is exposed to 288ºC hot water environment. The interfacial

bonding between PEEK and PBI is also found to change noticeably upon exposure to different

hygrothermal conditions. Both PEEK and PBI possess functional groups that can form hydrogen

bonding in the presence of water. The strength of the interface between PEEK and PBI under

various hygrothermal conditions has been systematically studied by dynamic mechanical

analysis and nanomechanical modulus mapping. In dry condition, the tan δ curve of PEEK in the

PEEK/PBI blend is identical to that of neat PEEK. After water immersion, the Tg of the PEEK

phase shifts to a lower temperature by 20 ºC, and the extent of this shift is more pronounced than

that observed from the soaked neat PEEK. The full-width half-maximum of the tan δ curve at Tg

peak is slightly broadened. After water immersion, the sub-Tg transitions that belong to PBI are

clearly shown in PEEK/PBI. Nanomechanical modulus mapping results indicate that the relative

elastic modulus in the interfacial region of PEEK/PBI is higher than both phases after water

uptake. The observation strongly suggests the compatibility of PEEK and PBI is promoted by the

formation of hydrogen bonding. Direct evidence of enhanced adhesion between PEEK and PBI

after water immersion is demonstrated through the fracture study. The mechanisms that cause the

property deterioration of the PEEK/PBI blend after hot water treatment are presented.

 

學經歷

A. Education

Ph. D. Macromolecular Science and Engineering Program (1988)

The University of Michigan, Ann Arbor, Michigan

Dissertation topic: "Mechanical Modeling and Experimental Observations of Toughened

Rigid-Rigid Polymer Alloys" (Advisor: Professor Albert F. Yee)

M.S.E. Department of Mechanical Engineering (1987)

The University of Michigan, Ann Arbor, Michigan

Project Topic: “Stress and Strain Fields in Two-Phase Materials”

M.S.E. Department of Materials Science and Engineering (1985)

The University of Michigan, Ann Arbor, Michigan

B.E. Department of Chemical Engineering (1981)

Chung-Yuan Christian University, Chung-Li, Taiwan

B. Work Experience

Visiting Professor, Kyushu U., Kobe U., Nanjing Tech U., National Taipei U. Tech. (2015-)

Professor, Department of Materials Sci. & Eng., TAMU. (2014-)

Co-Director, Advancing Polymers for Energy Sector Appl. Consortium, TAMU. (2011-)

Director, Polymer Technology Center, Texas Engineering Experimental Station (2003-)

Director, Scratch Behavior in Polymers Consortium, TAMU. (2001-)

Honorary Chair Professor, Sichuan Univ., Chengdu, China. (2013-2015)

Professor, Department of Mechanical Engineering, TAMU. (2002-2014)

Visiting Professor, Kyoto Institute of Technology and Kaneka Corporation, Japan (2008)

Visiting Principal Fellow, Institute of Materials Research & Eng., Singapore (2001-2002)

Visiting Professor, City University of Hong Kong (Summer 2001)

Co-Director, Polyolefins Film Consortium, TAMU. (1998-2001)

Visiting Associate Professor, Hong Kong Univ. Sci. Tech. (Summer 1999)

Visiting Associate Professor, INSA, Lyon, France (Summer 1997)

Associate Professor, Department of Mechanical Engineering, TAMU. (1995-2002)

Project Leader, Dow Chemical USA, Freeport, TX 77541 (1988-1995)

 

                                                                                                      


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