Melting point of polymers under high pressure

Effect of high pressure on the solid–liquid phase change of a nickel base superalloy during hot isostatic pressing

“…According to a work on the pressure dependence of the melting of polymers by Seeger et al [14], the melting point increases linearly with pressure up to 330 MPa at the rate of 11-17 K per 100 MPa. Results of the studies on the solidification of CuNi [15], AlNiY [16] and AlGe alloys [17] also indicate such an increase in the temperature of solidification or melting at a rate of ∼100 K/GPa upon increasing the pressure.…”

Effect of interface on thermodynamic behavior of liquid crystalline type amphiphilic di‐block copolymers

“…Their results concern the thermal, morphological, and structural behavior of an optically isotropic thermotropic cubic mesogene 4‐(ethylpentoxy)‐anilinebenzilidene‐4′‐carboxylic acid, up to 300 MPa, by DTA, wide‐angle X‐ray diffractometer, and polarizing optical microscope. The work of Seeger et al20 was related to the variation of melting temperature of various polymers including homo and copolymers, namely high density polyethylene, low density polyethylene, polypropylene, ethylene‐vinyl acetate copolymers (EVA) under nitrogen pressures up to 330 MPa by high‐pressure DTA. Russell and coworkers have used different techniques, including small‐angle neutron scattering and birefringence, to study the effect of hydrostatic pressure on closed‐loop phase behavior of block copolymers, like deuterated polystyrene‐ block ‐poly( n ‐pentyl methacrylate) (dPS‐PnPMa) 21.…”

Solubility and binary diffusion coefficient of argon in polyethylene glycols of different molecular weights

“…Otherwise it is important to know both melting points -for processed and unprocessed polymers. In literature different melting points were observed for polymers of different shapes -pallets and powders, also depending on the heating rate and the selected gas [37].…”