【摘 要】
：
To meet the processing requirements of resin transfer moulding (RTM) technology,reactive diluent containing m-phenylene moiety was synthesized to physically mixed with phenylethynyl terminated cooligoimides with well-designed molecular weights of 1500-250
【机 构】
：
Key Laboratory of Science and Technology on High-tech Polymer Materials,Chinese Academy of Sciences,
论文部分内容阅读
To meet the processing requirements of resin transfer moulding (RTM) technology,reactive diluent containing m-phenylene moiety was synthesized to physically mixed with phenylethynyl terminated cooligoimides with well-designed molecular weights of 1500-2500 g/mol derived from 4,4\'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA),3,4\'-oxydianiline (3,4\'-ODA) and m-phenylenediamine (m-PDA).This blend shows low minimum melting viscosity (＜1 Pa·s) and enlarged processing temperature window (260-361 ℃).FPI-R-1 stays below 1 Pa·s for 2 h at 270 ℃.The relationship between the molecular weight of the blend and its melting stability was first explored.Blending oligoimides with lower molecular weights exhibit better melting stability.Upon curing at 380 ℃ for 2 h,the thermosetting polyimide resin demonstrates superior heat resistance (Tg=420-426 ℃).
其他文献
Benzobisthiazole polymer with resonance-assisted hydrogen bonds (RAHBs) has been synthesized for both organic field-effect transistor and polymer solar cell applications.The properties of the hydrogen bonded polymer are compared with the reference polymer
This study investigated the effects of natural rubber (NR) and an organic peroxide on the rheological properties,mechanical properties,morphology,and bubble stability during film blowing of poly(lactic acid) (PLA).The NR and peroxide contents were varied
Organic solar cells are a current research hotspot in the energy field because of their advantages of lightness,translucency,roll to roll printing and building integration.With the rapid development of small molecule acceptor materials with high-performan
The mixing morphology control plays a crucial role in photovoltaic power generation,yet this specific effect on device performances remains elusive.Here,we employed computational approaches to delineate the photovoltaic properties of layered heterojunctio
Polymerization-induced chiral self-assembly (PICSA) is an efficient strategy that not only allows the construction of the supramolecular chiral assemblies in a controlled manner but also can regulate the morphology in situ.Herein,a series of azobenzene-co
Supramolecular adhesives that enable debonding on-demand are of significant research interest for the development of adaptive and smart materials,yet,biodegrable supramolecular adhesives have been rarely exploited.Herein,telechelic,three-armed and four-ar
Incorporating the surface-grafted cellulose nanocrystals (CNCs) with enantiomeric polylactide (PLLA or PDLA) is an effective and sustainable way to modify PLLA,but their difference in promoting matrix crystallization is still unrevealed.In this study,the
A biodegradable blend foaming material of poly(butylene adipate-co-terephthalate) (PBAT)/poly(propylene carbonate) (PPC) was successfully prepared by chemical foaming agent and screw extrusion method.First,PBAT was modified by bis(tert-butyl dioxy isoprop
A series of non-isocyanate linear high molecular weight poly(ester urethane)s (PETUs) were prepared through an environmentally-friendly route based on dimethyl carbonate,1,6-hexanediol and 1,6-hexanediamine.In this route,the polyurethane diol was first pr
Payne effect and its associated weak overshoot are of importance for understanding and regulating the softening of rubber nanocomposites under large amplitude oscillations.Herein,Payne effect in diverse filled vulcanizates is investigated for generalizing