Thermal, crystalline, and tribological properties of PEEK/PEI/PES plastics alloys

Abstract

PEEK/PEI/PES plastics alloys in weight ratios of 70/30/0, 70/25/5, 65/30/5, 60/30/10, 60/35/5, and the three kinds of single high performance engineering plastics 100/0/0, 0/100/0, 0/0/100 were prepared by twin-screw extrusion molding. A single glass-transition temperature (T g ) of each alloy in the former five kinds of the plastics alloys could be measured by DSC and always rose to higher one than that of the pure PEEK by about 20 C. The crystalline degrees of these alloys could also ascended to more than 35.81% higher than that of the pure PEEK, especially for the alloy of the ratio 60/30/10 reached the maximum crystalline degree 37.76%. Adding PEI or PEI and PES, the crystalline temperatures of the PEEK alloys were decreased. The wear resistances of the alloys under dry sliding condition were considerably improved compared with pure PEI or PES, and the specific wear rate of the pure PEI or PES were four to six times as large as that of the alloys. However, the specific wear rates of the alloys were six to eight times larger than that of the pure PEEK, and the friction coefficients of the alloys were higher than that of the pure PEEK for 0.2-0.3. The polymeric transferred film on the steel ring surface against the alloys could be found, but no film on that against pure PES or PEI was found.

Super tough graphene oxide reinforced polyetheretherketone for potential hard tissue repair applications

“…The Tm for all samples is almost constant (~ 339 ºC ), indicating the addition of GO has no distinct effect on the polymer melting point. The Tc of composites with GO content > 0.5%, starts to show a decreasing trend, due to the impeding effect of the GO on the PEEK mobility [39]. On the other hand, as nGO% increases from 0.1% to 5.0%, Xc % first peaked at 42.09% and dropped gradually to 23.20%, i.e., a similar level to that of pristine PEEK (23.16%).…”

Morphology, mechanical and dielectric properties, and rheological behavior of EAGMA toughened microcellular PEI–EAGMA foam

“…For this reason, polymer blending has been applied as a facile method to solve this problem. Thus, a variety of polymers have been fully miscible with the PEI matrix, such as poly(ether ether ketone), [19][20][21][22][23][24][25][26][27][28][29] poly(ethylene naphthalate), 22,[30][31][32] poly(butylene terephthalate), [33][34][35] poly(ethylene terephthalate) 36,37 polyarylate, 38,39 poly(ether sulfone) 40 and polyamide 66 41 etc. Although a lot of literature reported the mechanical behavior of various PEI-polymer unfoamed blends in detail, very little attention was paid to the elastomer toughened PEI microcellular foams.…”

The Effect of Nanoparticles (n-HAp, n-TiO₂) on the Thermal Properties and Biomechanical Analysis of Polymeric Composite Materials for Dental Applications

“…Therefore, the PEEK crystal size doesn't change after the addition of nanoparticles. The Tc of the composites showed a decreasing trend due to the inhibitory effect of the reinforcement on the PEEK mobility [35,36]. On the other hand, as n-TiO2% and n-HAp% increase from 0.5% to 1.5%, Xc% peaked exhibits somewhat increases or decreases, i.e.…”