Thermal Tunable Tribological Behavior of Shape Memory Biphenyl Epoxy Resin

Although polymer-based self-lubricating materials have rapidly developed recently, intelligent lubricating with self-adaptable lubrication external conditions changing are highly demanded, especially for harsh conditions. Herein, a shape memory epoxy resin based on the biphenyl units (BPEP) tunable tribological behavior was systematically studied. X-ray diffraction (XRD), field emission scanning electron microscope (SEM), laser confocal three-dimensional profiler, and optical were applied to analyze friction wear mechanism. Due presence of specific structural units, which could be performed switching phase between crystalline amorphous, that allows self-assembly polymer chain under π–π interaction. As result, improving mechanical properties enable BPEP perform outstanding in wide temperature range, coefficient (COF) can tuned range 0.10~0.175 by adjusting temperature. The effect refers modulus heat conversion during morphing, thermal observed physicochemical varying changing. BPEPs drives self-compensation so low rate (6.94 × 10−5 mm3 N−1 m−1) at 110 °C obtained. superb this broaden application scope polymers materials, it is expected guide future studies regulating behavior.