Crosslinking studies on poly(ethylene terephthalate‐co‐1,4‐phenylene bisacrylate)

Abstract

Several compositionally different poly(ethylene terephthalate-co-1,4-phenylene bisacrylate) (PETPBA) copolymers were melt spun into fibers. The resulting fibers were subjected to UV irradiation to induce crosslinking. Evidence of crosslinking was obtained from FTIR, solid-state 13 C-NMR, thermal analysis, and solubility. Irradiation of the fiber results in an increased glass-transition temperature, reduced thermal shrinkage, and enhanced modulus retention at elevated temperature.

Carbon nanotubes induced nonisothermal crystallization of ethylene–vinyl acetate copolymer

“…This leads to the conclusion that CNTs in iPP not only can induce more nucleation sites at higher crystallization temperature, but also can facilitate growth of the nuclei. Its thermodynamic origin is regarded as in part the result of high thermal conductivity of CNTs as heat will be more evenly distributed in the samples containing the carbon nanotubes [24]. The high nucleation ability of CNTs was confirmed in the CNT/EVA composite since it can start to crystallize at higher temperature than the neat EVA does.…”

Bottom-up synthesis of PS–CNF nanocomposites

“…In all the systems reviewed above, high shear and relatively long mixing times were used in order to separate CNFs and disperse CNFs in the polymer matrix. One result of the high shear mixing is that the CNFs are broken and thus the aspect ratio is reduced which directly affects the percolation threshold and load transfer [18,28].…”

“…Both thermoplastic and thermosetting polymers have been reinforced with CNFs: polypropylene (PP) [12][13][14][15][16][17], polycarbonate [18][19][20], poly (ether ether ketone) [21], nylon [17,22], ABS [23], and epoxy [24]. Conventional mixing methods such as a twinscrew extruder, high shear mixer and two-roll mill have been used.…”

Anisotropic deformation of polystyrene particles by MeV Au ion irradiation

“…The high electronic energy deposition causes a high temperature region around the ion track. Polymerization contraction occurs at high temperature for the cross-linking [20]. In PS, the formation of hydroxyl (-OH), alkene (C@C) and alkyne (CÀC) groups has been observed with MeV heavy ion bombardment [21], so the chemical change has to be considered besides the thermal spike model [15].…”