以二苯甲酮（BP）为光引发剂、丙烯酰胺（AM）为接枝单体,应用光接枝技术将AM接枝到涤棉织物上以改善其阻燃性能。分别对接枝前后涤棉织物进行了红外光谱、力学性能、燃烧性能、极限氧指数、热性能和残炭形貌的测试及分析。结果表明,AM可以通过光接枝技术接枝到涤棉织物表面,接枝后涤棉织物力学性能下降,氧指数、热性能提高。综合观察,接枝AM的涤棉织物的阻燃性明显提高。

The principles of single-wizard wet textiles and general methods of modification were introduced,meanwhile hydrophobic PP and PET nonwovens were key of them and be feasible to adopt surface modification method,and the blocking modification be one of the most important methods.It was pointed out that durable,efficient,environmental friendly and simple process be study tendency on single-wizard wet modification technique.

Flame retardant polyvinyl alcohol(PVA) grafted with acrylonitrile(AN) (FR-PVA-g-AN) was prepared via grafting copolymerization of AN onto PVA (PVA-g-AN) using K2S2O8-NaHSO3 as initiator followed by the chemical modification reaction with phosphoric acid and urea. The structure of FR-PVA-g-AN was characterized by Fourier transform infared spectroscope(FTIR), X-ray photoelectron spectroscopy(XPS) and X-ray diffraction(XRD), and the thermal property was studied by thermogravimetric analysis(TGA). The results show that the grafting percent reaches 190% under the condition of the mass fraction of initiator being 1% of the total reactant, the molar ratio of K2S2O8 to NaHSO3 being 5 : 1, the mass ratio of AN to PVA being 3. 5 : 1 and reaction temperature being 70 degrees C, and the reaction time of 4 h. The FR-PVA-g-AN with excellent fire retardancy can be obtained with the mass ratio of phosphoric acid to urea being 5 : 1 and reaction temperature of 85 degrees C for 4 h. There is about 63% char residue left after FR-PVA-g-AN was treated at 700 degrees C with muffle. The TGA curves indicate that the therrno-oxidative degradation of FR-PVA-g-AN is slower than that of PVA, and the char residue of FR-PVA-g-AN increases to 54. 3% at 800 degrees C, while the char residue of PVA is only 3. 12%, which fully proves that FR-PVA-g-AN has better thermal stability and char forming capability.

Acrylonitrile(AN)-vinyl acetate(VAc) copolymer [P(AN-co-VAc) ]was synthesized via aqueous phase precipitated radical copolymerization of AN and VAc using K2S2O8-NaHSO3 as initiator.The VAc unit of P(AN-co-VAc) was selectively hydrolyzed with KOH aqueous under different pH values.The halogen-free fire retardant AN copolymer was prepared by the phosphorylation reaction among phosphoric acid,urea and the hydrolyzed P(AN-co-VAc).The structure of AN copolymer was characterized by nuclear magnetic resonance hydrogen spectrum(1H NMR),Fourier transform infrared spectroscope(FTIR),and the thermal property of them was studied by differential scanning calorimetry(DSC) and thermogravimetric analysis(TGA).The number-average molecular weight(M n) and polydisperisity index(PDI) of the obtained P(AN-co-VAc) were determined by gel permeation chromatography(GPC).The char residue of the halogen-free fire retardant AN copolymer was analyzed by FTIR and SEM.The results show that AN is really copolymerized with VAc and P(AN-co-VAc) can be synthesized successfully.VAc unit is quickly hydrolyzed with the increase of pH.DSC indicates that with the increase of mass fraction of VAc in P(AN-co-VAc),the temperature of cyclic exothermic peak(T p) improves,and T p reaches to 328 ℃ with the mass fraction of VAc being 25%,while T p of fire retardant AN copolymer can be 340 ℃.TGA demonstrates that the char residue of fire retardant AN copolymer at 800 ℃ is 55%,which is higher than that of P(AN-co-VAc) being 41%,it fully proves that fire retardant AN copolymer has good char forming capability.The fire retardant mechanism of fire retardant AN copolymer belongs to condensed phase flame retardant mechanism.

The materials and production technique on manufacture nonwoven geotextile were introduced.The requirement on property of geotextile and performance and application of geotextile were present briefly.The change of development of geotextile was forecasted from traditional textile technology as main process to various technique used on manufacture product applied on several engineering.The product development would trend seriously,compositely and comprehensive.