Recyclable polyarylene sulfide and preparation method thereof

摘要

Embodiments of the present invention relate to recyclable polyarylene sulfide that may exhibit and maintain excellent mechanical properties, particularly does not exhibit decrease in melt viscosity when it is molten, and thus, exhibit little deterioration of mechanical properties, and a method for preparing the same. The polyarylene sulfide has initial melt viscosity measured at 300° C. of 300 to 6000 poise, and melt viscosity after heat treated and molten at 300° C., equal to or greater than the initial melt viscosity.

主权项

1. Polyarylene sulfide having initial melt viscosity measured at 300° C. of 500 to 4,000 poise, and melt viscosity after heat treated and molten at 300° C., equal to or greater than the initial melt viscosity, and melting point (Tm) of 270 to 285° C.,
wherein melt viscosity change rate as defined by the following Equation 1 is 0 to 20%:
Melt viscosity change rate(%)=100(MVf/MVi−1)  [Equation 1] in the Equation 1, MVi denotes the initial melt viscosity of polyarylene sulfide, and MVf is the melt viscosity of polyarylene sulfide after heat treating the polyarylene sulfide at 300° C. and melting it;
wherein the polyarylene sulfide is produced by a method comprising polymerizing a diiodide aromatic compound and an initial amount of a sulfur compound;adding an additional amount of sulfur compound at a point after the addition of the initial amount of a sulfur compound, wherein the polyarylene sulfide has iodine content of 0.8 wt % or less.