Preparation, Characterization And Performance Of Acrylic Graft Polyester Anti Soaked Wet Smart Fabric

In this paper, in the light of the shortcoming of current immersion layer fabrics oflmmersion-resistant suits, we bring forth new ideas to develop a kind of intelligent fabric withgood immersion resistance and good moisture Permeability which couId be used asimmerslon-resIstant Iayer. The concept of "polymer hydr0geI" was introduced into functionalfinishing belds of textiIes.Our research included four sections listed as follows.FirstIy, related studies of electron Beam(EB)-irradiated poly(ethyIene terephthalate)(PET) film were carried out. Some performance indexes such as surface contact angle,molecular weight, crosslinkage, tensile strength and break elongation etc. were investigated.The EB-irradiated PET film was charactenzed by various techniques, including FourierTransform infrared Absorption Spectrum (FTlR), Scanning EIeCtron Microscopy (SEM),Electron Spectroscopy of Chemical AnaIysis (ESCA), X-ray Diffraction, Differential ScanningCalorimetry (DSC). Degradation mechanism of PET film irradiated by EB in air was discussed,and the variation of super moIecular structure was explored. Furthermore, originaI test ofacrylic acid (AA) grafting to PET film was carried out. The results revealed that, after EBirradiation, the PET film showed yellowing tendency surface collapse Iayer was destroyedand surface wettability increased. Molecular weight of PET decreased gradually with theincreasing of irradiation dose, which indicated that PET macromolecular chains degradedduring EB irradiation. There was no crossIinking reaction occurred according to crosslinkagemeasurement results. Judged from ESCA spectra, the degradation of PET might folIow toType Norrish I mechanism, and was accompanied by production of CO, CO₂. According toDSC measurement results, crystallinity of PET increased to a somewhat extent after EBirradiation. X-ray differential spectra gave the information that the crystal structure keptconstant. Original grafting test showed, it is practicabIe to make PET grafted with AA by EBpreirradiation. Analysis of re1ated results combined with other researchers' concIusionassured us that gratting mainly occurred in amor0hous region of PET.Secondly , technology of preirradiation grafting of AA to poIyester fabric wasinvestigated. The graffing reaction technoIogy process is given as follows. EB pretrrautoion lmmersed into AA solution to perform grafting reactionOrbinal fabrics rinsed in water several times boiled in water to remove homopolymergrafted fabrics The resuts of the investigation showed that,graft ratio increased with the increasing of themonomer concentrationn when the concentration was lower than 50%．Within Certain reactiontime rangeï¼›the longer the reaction time,the higher the graft ratio．Reaction temperatureplayed an linportant role in grafting reaction．Only when it was higher than 55℃,coudapparent grafting reaction occur. Higher temperature helped increase graft rate and graft ratio．The graft rate is appropriate at 75℃．The ability of inducing graft吨 of preirradiated加【W9妇r灿nc帕0阳钻劝 æ´²m å¹»0旧驴tMe m a＊8川阶c 肛旧 阑n 帅＊0bmehorn000lymerlzatlon,wMch Is unbenlnclaD to sncrease gran ralb．仆e e湘dof M0hr's SaDI【scomplicated．Itcan restralnbothhom0POlymerlzatlon andgraftcop0lymerlzatlon atsametlme．H0weven atan appropriate concentration,ltcan restrain homopolymerlzatlon en一ctlvely andbring higher graft ratio simultaneously, ＊卜汀d匕me ii比【＊＊＊sffib5hno恤【e a＊d ii＊or＊0＊3 ii比＊＊＊＊巾05＊pci以＊5怕r抢＊卜sgrafted by AA were investigated．Grafted fabrics were characterized by FTR and DSC etc一The thicknessï¼›degree of swehng,moæ—§tUre regain,wateræ—§hjbkon ratio and moistUrepermeabdty of grafted fabric with various graft ratro were measured．We desæ—§ned andmanUfactured a sc10fwat6rnowrale－measuring device,w汕帅忆 å±±e d椎rence ofwalerpreventing ahhtyï¼›1．e,so－called immersion resistance,between grafted fabric...