In this study,the high degree of substitution of phosphate ester fiber was prepared by using cotton phosphate as raw material,mixed phosphate NaH2 PO4/Na2 HPO4 as esterif-ying agent and urea as catalyst with half-dry synthesis process.The effects of the dosage of phosphate,reaction temperature,time and pH on the degree of substitution and reaction effi-ciency of phosphate ester fiber were investigated.The results showed that the degree of sub-stitution of phosphate ester fiber was 0.066 when the amount of phosphate was 20%,the re-action temperature was 120 ℃,the reaction time was 2 h,pH 6.0 and the amount of urea was 4%,the reaction efficiency of the fiber was 42.7%,and the fiber was most damaged.%以棉浆纤维为原料,以混合磷酸盐Na2 HPO4/NaH2 PO4为酯化剂,在尿素的催化作用下采用半干法制备出了高取代度磷酸酯化纤维,并考察了磷酸盐用量、反应温度、时间、pH等因素对磷酸酯化纤维取代度及反应效率的影响.结果表明:当磷酸盐用量为20%、反应温度120℃ 、反应时间2 h、p H 6.0、尿素用量4%时,磷酸酯化纤维的取代度为0.066,此时纤维的反应效率为42.7%,纤维被破坏程度最大.
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