국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Polyimides Based on Asymmetric Dianhydrides (II) (a-BPDA vs a-BTDA) for Resin Transfer Molding (RTM)
저자	Chuang, Kathy C.;; Criss, Jim M.;; Mintz, Eric A.
Keyword	AEROSPACE ENGINEERING;; ANHYDRIDES;; ASYMMETRY;; CARBON FIBERS;; DIAMINES;; FABRICATION;; GLASS TRANSITION TEMPERATURE;; MECHANICAL PROPERTIES;; OLIGOMERS;; PANELS;; PHYSICAL PROPERTIES;; POLYIMIDES;; RESIN TRANSFER MOLDING;; RHEOLOGY;; ROOM TEMPERATURE;; SHEAR STRENGTH;; SYNTHESIS (CHEMISTRY); VISCOSITY
URL	http://hdl.handle.net/2060/20100040591
보고서번호	E-17516
발행년도	2010
출처	NTRS (NASA Technical Report Server)
ABSTRACT	A new series of low-melt viscosity imide resins ྪ-20 poise at 280 C) were formulated from asymmetric 2,3,3'',4'' -benzophenone dianhydride (a-BTDA) and 4-phenylethynylphthalic endcaps, along with 3,4'' -oxydianiline, 3,3'' -methylenedianiline and 3,3''- diaminobenzophenone, using a solvent-free melt process. a-BTDA RTM resins exhibited higher glass transition temperatures (Tg''s = 330-400 C) compared to those prepared by asymmetric 2,3,3'',4'' -biphenyl dianhydride, (a-BPDA, Tg''s = 320-370 C). These low-melt viscosity imide resins were fabricated into polyimide/T650-35 carbon fiber composites by a RTM process. Composites properties of a-BTDA resins, such as open-hole compression and short-beam shear strength, are compared to those of composites made from a-BPDA based resin at room temperature, 288 C and 315 C. These novel, high temperature RTM imide resins exhibit outstanding properties beyond the performance of conventional RTM resins, such as epoxy and BMI resins which have use-temperatures around 177 C and 232 C for aerospace applications.