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首页> 外文期刊>Journal of Applied Polymer Science >THE EFFECT OF N,N-DIMETHYLFORMAMIDE AND POLYMER GRAFTING ON THE MORPHOLOGY OF POLYESTER FIBERS IN FABRIC SUBSTRATE
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THE EFFECT OF N,N-DIMETHYLFORMAMIDE AND POLYMER GRAFTING ON THE MORPHOLOGY OF POLYESTER FIBERS IN FABRIC SUBSTRATE

机译：N，N-二甲基甲酰胺和聚合物接枝对织物基质中聚酯纤维形态的影响

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摘要

Photo-induced graft polymerization of acrylic acid (AA) and methyl acrylate (MA) in the liquid and vapor phase, respectively, onto N,N-dimethyformamide (DMF)-pretreated poly(ethylene terephthalate) (PET) fibers in fabric substrate was studied. The effect of various synthesis conditions and DMF pretreatment on the graft yields on PET was investigated. The internal morphology and properties of DMF-pretreated and grafted PET fibers in the fabric were characterized using density and birefringence measurements, differential thermal analysis (DTA), Fourier transform infrared spectroscopy (FTIR), dyeing methods, and critical dissolution times. The grafting was promoted by increasing DMF pretreatment temperature and the amount of DMF retention in the PET. Increasing biacetyl and monomer flow time and irradiation time enhanced grafting. DMF pretreatment resulted in increases in total void content, degree of crystallinity, trans-isomer content, chain folding, segmental mobility, and molecular packing of the PET, but caused decreases in its amorphous orientation, intermolecular forces, and individual void size through longitudinal shrinkage, lateral swelling, and removal of oligomers. Subsequent graft copolymerization led to further changes in the internal morphology and properties of the PET. PET grafted with AA had a higher cohesive energy density, lower degree of molecular packing, and larger individual void size, but less total void content, lower segmental mobility, less chain orientation, and a lower degree of crystallinity. PET grafted with MA showed increases in total void content, individual void size, segmental mobility, and molecular packing, but showed decreases in chain orientation and degree of crystallinity. (C) 1996 John Wiley & Sons, Inc. [References: 44]
机译：分别在液相和气相中将丙烯酸（AA）和丙烯酸甲酯（MA）分别光引发到织物基材中的N，N-二甲基甲酰胺（DMF）预处理的聚对苯二甲酸乙二醇酯（PET）纤维上研究。研究了各种合成条件和DMF预处理对PET接枝率的影响。使用密度和双折射测量，差热分析（​​DTA），傅里叶变换红外光谱（FTIR），染色方法和临界溶解时间来表征DMF预处理和接枝PET纤维在织物中的内部形态和性能。通过提高DMF预处理温度和DMF在PET中的保留量来促进接枝。联乙酰和单体流动时间和辐照时间的增加会增强接枝。 DMF预处理导致PET的总空隙含量，结晶度，反式异构体含量，链折叠，链段移动性和分子堆积的增加，但通过纵向收缩导致其无定形取向，分子间作用力和单个空隙尺寸减小，侧向膨胀和去除低聚物。随后的接枝共聚导致PET内部形态和性能的进一步变化。用AA接枝的PET具有更高的内聚能密度，较低的分子堆积度和较大的单个空隙尺寸，但总空隙含量较少，分段迁移率较低，链取向较少且结晶度较低。用MA接枝的PET显示总空隙含量，单个空隙尺寸，分段迁移率和分子堆积增加，但链取向和结晶度下降。 （C）1996 John Wiley＆Sons，Inc. [参考：44]

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