Electrophoretic deposition of polyetherimide from an aqueous emulsion: optimisation of some deposition parameters

Abstract

A systematic study was carried out to investigate the cataphoretic electrodeposition of polyetherimide from an aqueous medium onto an electrically conductive support (aluminum, steel mesh). The subsequent re-imidisation steps were also investigated. The yield and quality of deposited polyetherimide were found to be strongly dependent upon a number of formulation variables that are closely related to the emulsion composition and electrodeposition conditions. A polymer modi®ed to 70% with methylpiperazine and quaternised to 50% with lactic acid gave a stable emulsion at 6% w/w (seven days at 4±5°C). Maximum rate of deposition was obtained with an initial current density of 10 mA cm À2 in the voltage range of 40±68 V.

Heating Effects on Structural and Electrical Properties of Polyetherimide

“…Figure 4 shows the FTIR-ATR spectrum of the virgin sample. The assignments of the main absorption bands, made basing on literature [7,[11][12][13][14] are shown in Fig. 4.…”

Heating Effects on Structural and Electrical Properties of Polyetherimide

“…Figure 4 shows the FTIR-ATR spectrum of the virgin sample. The assignments of the main absorption bands, made basing on literature [7,[11][12][13][14] are shown in Fig. 4.…”

Experimental review of PEI electrodeposition onto copper substrates for insulation of complex geometries

“…1b). 14 The band at 1360 cm À1 and the broad shoulder observed for the band at 1670 cm À1 was ascribed to the characteristics bands of acetophenone (Fig. S6 †).…”

“…The EPD of PEI requires a quaternization reaction resulting in protonated PEI (qPEI) for the formation of a charged polymer emulsion suspension and subsequent effective electrophoretic deposition of the PEI onto the conductive substrate. 13,14 The PEI's imide group undergoes a ring-opening reaction by the addition of 1-methylpiperazine, leading to the formation of an amide group in the PEI structure (Fig. 1a and S1 †).…”