Melt Spinning Preparation And Property Analysis Of PP/IPN Phase Change Fiber

With the improvement of living standards, people are increasingly high demand for textile products. In the pursuit of comfort at the same time, more and more attention to the functiona textiles. Because single function already can’t satisfy people’s needs, people are constantly pursuing more functionalization of fibers. As the starting point of this study, a phase change functional particle was prepared as the modifier, and the attemperation, hygroscopicity and dyeability multifunction polypropylene fibers (PP) was prepared with polypropylene by melt spinning.In this study, ploy(N-hydroxylmethyl acrylamide)/polyethylene glycol (PNHMPA/PEG) composite phase change material was prepared by radical polymerization, and selected the best scheme by the orthogonal test method. The results show that the PNHMP A/PEG composite phase change material has porous structure. FTIR analysis show that the new materials do not produce. DSC results show that the melting enthalpy of the composite PCMs is 107.98 J/g accounted for 94.50% of theoretical value (114.27J/g), and the crystal enthalpy is 80.01 J/g accounted for 93.07% of theoretical value (85.97J/g). TGA analysis indicated that the composite PCMs has good thermal stability below 350℃, and step cooling results show that it has good temperature regulation ability and the role of delaying temperature changes.The PNHMP A/PEG composite phase change material was prepared as a functional modified particle, and PP/IPN/PP-g-PEGA (PNHMPA/PEG, hereinafter referred to as IPN) phase change fibers were also prepared by melt spinning. The PP/IPN/PP-g-PEGA phase change fibers were characterized using capillary rheometer, optical microscope, scanning electron microscope (SEM), fourier transform infrared spectrometer (FTIR), X ray diffraction (XRD), differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA), dynamic mechanical analysis (DMA) and other means of the performance test. The results show that PP/IPN/PP-g-PEGA blend system is a typical pseudoplastic fluid. The SEM results show that clear interior of fibers has no obvious phase separation and the phase transition particles are dispersed evenly in PP matrix. The FTIR show that the system has no new group. The XRD results show that the crystal structure of PP is not affected with the addition of IPN, but diffraction peak strength of PP/IPN/PP-g-PEGA blend system is lower than PP. DSC analysis shows that PEG has less loss under temperature and high shear. DMA results show that the composite materials has high resistance force and deformation ability when IPN content is 12%. TGA analysis indicated that the composite material has good thermal stability below 350℃. The breaking strength of PP/IPN phase change fibers is slightly smaller than that of pure PP fiber, and the highest breaking strength reaches 3.479cN/dex. In addition, when the mass fraction of IPN is 16%, the hygroscopicity and dyeability are 0.82% and 58.28%, respectively.Considering consistency problem between the nonpolar polymer and interpenetrating polymer network with polar group, PP-g-PEGA was prepared by solution polymerization. The FTIR results show that PEGA has successfully grafted to the PP, and the grafting rate is 1.31%. TGA analysis indicated that PP and PP-g-PEGA have very good thermal stability, and meeting the requirements of experimental processing temperature, that is 190℃.In this study, a crosslinking network phase change materials was prepared as the modifier, and the attemperation, hygroscopicity and dyeability multifunction polypropylene fibers was prepared with polypropylene by melt spinning. And it has very good development prospects due to its low cost, simple process, multifunction, etal.