磷酸改性水溶性酚醛树脂的成炭性能  

Effect of Phosphoric Acid on Water-Soluble Phenol-Formaldehyde Resin Carbonization

作　　者：苗森[1] 余若冰[1] 焦扬声[1] 焦正[2] 

机构地区：[1]华东理工大学特种功能高分子材料及相关技术教育部重点实验室,上海200237 [2]上海大学环境与化学工程学院,上海200444

出　　处：《上海大学学报（自然科学版）》2010年第5期508-512,共5页Journal of Shanghai University:Natural Science Edition

摘　　要：以甲醛和苯酚为原料,氢氧化钡为催化剂,制备一种低游离酚的水溶性酚醛树脂.对水溶性酚醛树脂及磷酸改性的水溶性酚醛树脂的结构和成炭机理进行研究,同时探讨甲醛与苯酚的比例和反应时间对树脂残炭率的影响.研究结果表明,水溶性酚醛树脂在800℃下的残炭率为55.0%,而磷酸改性后树脂的残炭率可以达到66.7%.原因可能是磷酸进入树脂中提高了树脂的芳香性,降低了树脂在高温下的分解量,从而提高了水溶性酚醛树脂的残炭率.The water-soluble phenol-formaldehyde resin（PF） with low free phenol was prepared from formaldehyde and phenol in the presence of barium hydroxide.The structure and charring mechanism of the water-soluble PF resin and phosphoric acid modified water-soluble PF resin were studied.The effect of mol ratio of phenol to formaldehyde and the reaction time on char yield ware discussed.The results indicate that the char yield of phosphoric acid modified water-soluble PF（66.7% at 800 ℃） is higher than water-soluble PF（55.0% at 800 ℃） due to an increase in aromaticity by the addition of phosphoric acid,resulting in low decomposition at elevated temperature.

关 键 词：成炭性能 水溶性 酚醛树脂 磷酸 

分 类 号：TQ322.4[化学工程—合成树脂塑料工业]