Production and characterization of polypropylene fiber upon addition of selective peroxide during melt spinning and comparison with conventional polypropylene fibers

Abstract

In the present work, effect of selective peroxide on reactor grade polypropylene (PP) (known as V30S) during melt spinning process on the physical and thermal properties of as-spun resultant multifilament yarn was studied. Attempts have also been made to compare this yarn sample with other fiber samples produced from reactor and controlled rheology grades polypropylene. The results show that the multifilament yarn spun from V30S/Peroxide sample shows higher birefringence and tensile strength and also lower modulus, elongation at break, and shrinkage compared with that of spun from pure V30S granule. Density and thermal behavior studies show low variations compared with original sample.

Effect of hot drawing process on physical and thermal properties of polypropylene fiber containing selective peroxide and comparison with conventional polypropylene fibers

“…The details of melt spinning process described in the previous work [22] . Briefly, the polymer melts were extruded at a rate of 100 g/min through a spinneret with 36 circular orifices, each of 0.25 mm diameter.…”

“…The final linear density of multifilament yarns was 140 dtex. For spinning fiber from V30S/Peroxide sample, we first determined the optimum concentration of peroxide which has been determined in our previous work [22] . After examining the spinnability of V30S/ Peroxide sample with different concentration of peroxide, we choose amount of 0.3 wt.…”

“…Various views of structural and property changes resulting from drawing process have been extensively investigated [19][20][21] . In our previous investigation, the effect of addition of selective peroxide to a broad MWD polypropylene granule (known as V30S) during melt spinning was investigated [22] . Also the mechanical and thermal properties of as-spun V30S/Peroxide fiber were compared with conventional polypropylene fibers with different structures.…”

Tensile properties of polypropylene fibres

“…Melt spinning is a common method in which fibres are extruded through a die and then drawn [46]. In the 1980s, polymers with sharper MMD were obtained using controlled peroxide initiated thermal degradation [48]. In long spinning, drawing is mostly possible from the molten state.…”

Influence of Dilauroyl Peroxide on Mechanical and Thermal Properties of Different Polypropylene Matrices

“…These operations involve the use of free radical initiators to induce chain scission reactions. [8][9][10] The properties of polyolefin are routinely modified by molecular structural changes caused by attack of free radicals. Free radicals formed on the main chain atoms set off a variety of reactions that end at modifying the molecular macrostructure.…”