국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Processing and Properties of Vacuum Assisted Resin Transfer Molded Phenylethynyl Terminated Imide Composites
저자	Cano, Roberto J.;; Ghose, Sayata;; Watson, Kent A.;; Chunchu, Prasad B.;; Jensen, Brian J.;; Connell, John W.
Keyword	AUTOCLAVES;; CARBON FIBERS;; COMPOSITE STRUCTURES;; COST REDUCTION;; FABRICATION;; IMIDES;; MECHANICAL PROPERTIES;; PANELS;; PHENYLS;; PHYSICAL PROPERTIES;; PREFORMS;; REFRACTORY MATERIALS;; RESIN TRANSFER MOLDING;; ROOM TEMPERATURE;; THERMAL STABILITY
URL	http://hdl.handle.net/2060/20120009211
보고서번호	NF1676L-13433
발행년도	2012
출처	NTRS (NASA Technical Report Server)
ABSTRACT	Polyimide composites are very attractive for applications that require a high strength to weight ratio and thermal stability. Recent work at NASA Langley Research Center (LaRC) has concentrated on developing new polyimide resin systems that can be processed without the use of an autoclave for advanced aerospace applications. Due to their low melt viscosities and long melt stability, certain phenylethynyl terminated imides (PETI) can be processed into composites using high temperature vacuum assisted resin transfer molding (HT-VARTM). VARTM has shown the potential to reduce the manufacturing cost of composite structures. In the current study, two PETI resins, LARC(Trademark) PETI-330 and LARC(Trademark) PETI-9, were infused into carbon fiber preforms at 260 C and cured at temperatures up to 371 C. Photomicrographs of polished cross sections were taken and void contents, determined by acid digestion, were below 4.5%. Mechanical properties including short block compression (SBC), compression after impact (CAI), and open hole compression (OHC) were determined at room temperature, 177 C, and 288 C. Both PETI-9 and PETI-330 composites demonstrated very good retention of mechanical properties at elevated temperatures. SBC and OHC properties after aging for 1000 hours at temperatures up to 288 C were also determined.