標題: SYNTHESIS AND CHARACTERIZATION OF BLOCK COPOLYMERS OF POLYETHER SULFONE WITH LIQUID-CRYSTALLINE POLYESTERS
作者: HSU, CS
CHEN, LB
交大名義發表
應用化學系
National Chiao Tung University
Department of Applied Chemistry
公開日期: 1-四月-1993
摘要: A series of novel ABA block copolymers containing a liquid crystalline polyester (A) block and an amorphous polyether sulfone (B) block were prepared. The block copolymers were characterized by FT-IR spectroscopy, differential scanning calorimetry, thermogravimetric analysis, optical polarizing microscopy and X-ray diffraction measurement. Calculated results obtained from FT-IR spectra and a hydrolysis study reveal that the block copolymers contain 17-33% weight of polyether sulfone segments. All the prepared block copolymers have shown a liquid crystalline property. The block copolymer containing 33% polyether sulfone presented a glass transition at 180-degrees-C and a crystalline to nematic phase transition at 278-degrees-C. The other copolymers have exhibited only a crystalline to nematic phase transition at approximately 255-degrees-C.
URI: http://hdl.handle.net/11536/3068
ISSN: 0254-0584
期刊: MATERIALS CHEMISTRY AND PHYSICS
Volume: 34
Issue: 1
起始頁: 28
結束頁: 34
顯示於類別:期刊論文