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以丁二酸和丁二醇为原料,采用溶液与熔融结合法合成了端羟基聚丁二酸丁二醇酯(PBS),用甲苯-2,4-二异氰酸酯(TDI)对PBS封端,合成了线性遥爪型纸张增强剂TDI-PBS。用IR,1HNMR表征了PBS的结构并用GPC测定了其相对分子质量和分子质量分布;考察了聚合物TDI-PBS对纸张物理性能的增强效果。结果表明,采用浸渍法,当TDI-PBS溶液质量分数为12%,熟化温度为110℃,熟化时间为60min时,TDI-PBS可明显改善纸张的物理性能,干强度提高了36%,湿强度达到原纸的4倍,干湿强度之比达39%,耐破度达到原纸的1.6倍。
The succinic acid and butanediol were used as raw materials to synthesize hydroxyl-terminated polybutylene succinate (PBS) by solution and melt-bonding method, blocked with toluene-2,4-diisocyanate (TDI) Linear telechelic paper enhancer TDI-PBS was synthesized. The structure of PBS was characterized by IR and 1HNMR. The relative molecular mass and molecular mass distribution were determined by GPC. The effect of polymer TDI-PBS on the physical properties of paper was investigated. The results showed that TDI-PBS could significantly improve the physical properties of paper when the content of TDI-PBS was 12%, the aging temperature was 110 ℃ and the aging time was 60min. The wet strength increased by 36% Up to 4 times the base paper, wet and dry strength ratio of 39%, burst resistance reached 1.6 times the base paper.