Study On Properties Of Copolymethacrylate Functional Fiber

Butyl methacrylate(BMA)and hydroethyl methacrylate(HEMA)as monomers, the copolymer to absorb organic matter liquid was synthesized when butyl methacrylate and hydroethyl methacrylate were copolymerized by suspension polymerization.The effect of the content of hydroethyl methacrylate on saturated oil absorbency,oil-absorptive rate,the content ratio of the remaining copolymer and controlled-release property of copolymer was given important investigation and discussion,the result showed that the effect of hydroethyl methacrylate was more significant and the copolymer with the proper content of hydroethyl methacrylate would have more excellent general properties.Intermoleculal and intramolecular hydrogen bond,along with dynamic mechanical property of the copolymer were researched resorting to Fourier-transform infrared (FTIR)and Dynamic thermomechanmetry(DMA).The results showed hydrogen bond existed in intermolecules and intramolecules of copolymer,it was beneficial to form physical crosslink,hydroethyl methacrylate content had obvious effect on dynamic mechanics performance,especially,segment movement of macromolecule was affected obviously.Differential scanning calorimetry(DSC)investigation indicated the glass transition temperature of copolymer increased when hydroethyl methacrylate content increased.The result which was researched by thermogravimetric analysis(TG)showed the copolymer had good heat-resisting property and could be used under 200℃.By nuclear magnetic resonance(NMR) spectrometer,it could be found that there was not chemical crosslinking structure between copolymer macromolecules,but the fact simulated and analysed by materials studio software illuminated it was easier for copolymer macromolecules to form physical crosslinking structure by entanglement.Industrial lauryl methacrylate was refined,and homopolymer was synthesized by suspension polymerization.The results showed that purity of lauryl methacrylate refined by 6wt%and 8wt%alkali lye was improved obviously and saturated oil absorbency,along with oil absorption rate of the homopolymer was increased,even was close to saturated oil absorbency of homopolymer synthesized by chemical purity monomer imported from Belgium.After investigating the remaining ratio,the result implied that formation of physical crosslinking structure between macromolecules could satisfy not only the request to absorb organic matter liquid,but also the request to not to dissolve into organic matter liquid.Thermogravimetric analysis(TG) investigation showed the heat-resistance of homopolymer synthesized by refined monomer was improved and thermal decomposition temperature increased.The result analyzed by differential scanning calorimetry(DSC)explained homopolymer synthesized by industrial monomer was compared with homopolymer prepared by refined monomer,the types of low temperature glass transition differed with each other distinctly due to the impurity.Functional fiber which could absorb organic matter liquid was prepared by high concentration solution-spinning,by investigation,it could be found that the content of hydroethyl methacrylate played an important role on swell and flow behavior of copolymer.From scanning electron microscopy(SEM)graphs,when content of hydroethyl methacrylate below 10wt%,it was beneficial to prepare functional fiber with smooth and little deficiency surface,but when absorptive property and surface regularity as common considered factors,it was proper for hydroethyl methacrylate content between 5wt%and 10wt%,that is,under this condition,the fiber with better general property.Through studying saturated oil absorbency,oil absorptive rate,the remaining ratio and oil retention ratio,the content of hydroethyl methacrylate could act as a crucial reason to affect the capabilities that butyl methacrylate/hydroethyl methacrylate copolymer fiber absorbed and reserved organic matter liquid.Fiber after absorbing organic matter liquid,such as kerosene,toluene and trichloroethylene,it was quick for butyl methacrylate/hydroethyl methacrylate copolymer fiber to release themResult from dynamic thermomechanmetry(DMA)showed it was good and propitious for butyl methacrylate/hydroethyl methacrylate copolymer fiber to improve mechanical property when orientation and crystallization occurred under effect of stretching stress.Thermogravimetric analysis(TG)implied that there was not decomposition phenomenon under 250℃,besides,the temperature when weight loss rate located maximum and the half decomposition temperature increased as the content of hydroethyl metharylate enhancing,which proved the truth that enhancing the content of hydroethyl metharylate could improve heat-resistance performance of fiber.X-ray diffraction result explained that the crystallization could be interrupted as the content of hydroethyl metharylate enhancing,as a result,fiber would form a looser amorphous structure,then it was easier for organic matter liquid to permeate and diffuse into internal networks of fibers,which not only quickened oil absorptive rate but also advanced oil absorbency.