摘要
用等规聚丙烯切片(IPP)与少量乙烯-醋酸乙烯共聚物(EVA)共混纺丝后,再经过皂化处理可制得阳离子染料染色性能较好的 EVA/IPP皂化纤维。文章讨论了采用不同皂化、染色条件对纤维上染率的影响。研究表明,对5%EVA/IPP 纤维进行皂化处理后,EVA 中部分乙酰氧基团转化为体积较小的羟基,从而可以采用色彩十分艳丽的阳离子染料在100℃温度、碱性浴条件下染纤维至中色。上染率可达到5至7(mg 染料/g 纤维)。同时皂化还使纤维的分散染料上染率从皂化前的20(mg 染料/g 纤维)左右上升到30(mg 染料/g 纤维)左右。作者还采用 X 光广角衍射、差动热分析法、声速法等实验手段研究了 EVA/IPP 皂化纤维的结构与性能,并同未皂化纤维的结构与性能作了比较。结果表明,皂化使纤维的蕴晶部分转化为α晶体;取向度、强度有所下降;吸湿性能有所改善。
A fibre with good dyeing behavior can be made by saponificating the isotactic polypropylene(IPP)fibre blended with small amounts of ethylene vinylacetate copolymer(EVA).The influence ofsaponification and dyeing conditions on fibre dye uptake is discussed.Results shows that some of acy-loxies in the EVA turns into small hydroxyls after saponificating 5%-EVA/IPP fibre so the treated fi-bre can be dyed to medium shade by using colorful cationic dyestuff at 100℃ in alkalibath.The fibredye uptake reaches 5 to 7 milligram dyestuff per gram fibre.Saponification also increases the fibre dis-perse dye uptake from 20 to 30 or so.Wide angle X-ray diffraction,differential scanning calorimetry(DSC),sonic modulus measurement and some other methods are employed to observe the structure andproperties of the saponificated fibre.It is found that compared with non-treated one,the treated fibrehas certain changes in structure and properties;paracrystal turns into α-crystal,fibre orientation factorand breakdown strength decrease a little and moisture property gets some improvement.
出处
《中国纺织大学学报》
CSCD
1992年第4期37-43,共7页
Journal of China Textile University
关键词
化学改性
等规聚丙烯
混合纺丝
chemical modification
isotactic polypropylene
blend spinning
cationic dyes
dyeability
structural behavior.
