Physical aging of polyetherimide (PEI) was studied using a bellows dilatometer based on Zoller's design. A linear variable
differential transformer (LVDT) is used to measure the displacement of the bellows. The voltage output of the LVDT is interfaced
to a computer for automated data collection. Isothermal aging experiments were carried out at temperatures near the glass
temperature (206–209 ‡C) using a constant temperature oil bath maintained at the desired aging temperature. The time required
to reach equilibrium and the reduced curve produced by aging time-temperature superposition are given. The results compare
well with data obtained by capillary dilatometry for the same material.
A radiotracer based method for the determination of the rate of expel of a swelling agent from a swelling agent saturated polymer foil induced by a second organic liquid (i.e., blowing agent for foaming of polymers) has been set up and tested. The method was applied to acetone swollen polyetherimide (PEI) foil and 1,1,1-trichloroethane and ethanol (blowing agents) systems. By combining the results of radiotracer measurements with those obtained by measuring foil weights, the amount of the respective blowing agents that replaced acetone in the PEI foil was determined.
Authors:P. Rajagopalan, L. Kandpal, A. Tewary, R. Singh, K. Pandey, and G. Mathur
PEEK is characterised by high impact and fatigue resistance andTg of 145‡C. Blends of PEEK and PEI have been made and scanning electron micro-graphs of the broken specimen show that the two
polymers are completely miscible in all proportions. The study also shows that PEEK∶PEI 50∶50 blend, can be used as matrix
for composite applications with appreciable enhancement ofTg to 177‡C.
Authors:H.J. Shi, Z.J. Sun, Z.M. Yan, and J.B. Ren
, Y. , Shi , H. , Tang , J. , Li , F. & Wang , S. ( 2015 ): Improvement of radio frequency (RF) heating uniformity on low moisture foods with polyetherimide (PEI) blocks . Food Res. Int. , 74 , 106 – 114
Harismendy , I , Rio , MD , Marieta , C , Gavalda , J , Gomez , CM , Mondragon , I 2001 Dicyanate ester–polyetherimide semi-interpenetrating polymer networks. II. Effects of morphology on the fracture toughness and mechanical properties . J Appl
Authors:K. Bachari, R. M. Guerroudj, and M. Lamouchi
in double-walled digestion vessels which have an inner liner and cover made up of Teflon PFA and an outer strength vessel shell of Ultem polyetherimide. In a typical procedure, kanemite (2.2 g) was added into a beaker containing a mixture of CTMABr (0