Abstract Polyimide aerogels have excellent thermal and mechanical properties, resulting in various applications, especially insulation areas. However, the conventional methods for directly producing aerogel blocks can be time-consuming expensive due to long-term solvent exchange drying. This study developed two alternative techniques, adding dimethyl sulfoxide epoxy into polyimide particles con...

Due to the great importance for many industrial applications it is crucial from the point of view of theoretical description to reproduce thermal properties of thermoplastic polyimides as accurate as possible in order to establish "chemical structure-physical properties" relationships of new materials. In this paper we employ differential scanning calorimetry, dilatometry, and atomistic molecul...

A dense layer of amorphous carbon nanofibers was fabricated by pyrolyzing a thin film of polyimide using a monolayer of gold nanoparticles as a catalyst.

Polyimides have been widely used as high-performance polymers, but controlling their morphology is still challenging. This study focuses on fabricating spherical polyimide particles by the precipitation polymerization of diamine and tetracarboxylic dianhydride monomers. Polyimide were prepared changing concentration structure monomers in presence a dispersant, effect these conditions size distr...

A series of polyimidesiloxane (SIM) copolymers, based on a.co-aminopropylpoly(dimethylsiloxane)(PDMS),2,2-bis(4-[4-aminophenoxyl]phenyl)propane(BAPP)and 4,4'-oxydiphthalic-anhydride(ODPA) was synthesized in our laboratories. We investigated the effect of siloxane segment length on the surface composition of the SIM copolymers and its role in adhesion. The aim is to elucidate the correlation bet...

In this study, electrodes on a exible printed circuit board (FPCB) and rigid printed circuit board (RPCB) were bonded together by thermo-compression (TC) bonding, using a Sn-3.0Ag-0.5Cu solder as an interlayer. In order to investigate the hygrothermal reliability of the TC bonded FPCB/RPCB joints, a temperature-humidity (TH) test of 85°C/85% relative humidity, and a 90° peel test, were conducte...

Polyimide-graphene nanosheet composite electrodes are rigid and dense and, therefore, exhibit moderate electrochemical properties. The properties of polyimide-graphene were remarkably improved by creating voids in the followed insertion nickel oxide into composites. Nickel particles electrodeposited onto porous graphene/poly(amic acid) composite, containing poly (acrylic resin). hybrid was then...

Long-term success of an implantable retinal prosthesis depends on the ability to hermetically seal sensitive electronics from a saline environment with an encapsulant material. Furthermore, the retinal implant project's proposed laser-driven prosthesis requires that the encapsulation material be transparent. The device itself has two components that must protrude out of the encapsulation materi...

A KrF excimer laser projection micromachining tool has been designed and implemented aiming to accomplish onestep etching with micron resolution for applications such as chip module packaging and polyimide technology in semiconductor manufacturing. Two polyimide (Probimide 7020) thin films spun on the silicon wafers are annealed at 100 C and 400 C, respectively, in order to investigate the effe...