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针对废旧光盘的化学法处理,在化学洗脱最佳实验条件的基础上重点研究1,2-二氯乙烷-乙醇溶解反沉淀最佳实验条件(温度、搅拌速率)以及1,2-二氯乙烷乙醇混合液加水分离时最佳加水量,随后在聚碳酸酯粗颗粒中加入抗坏血酸(抗氧化剂)、邻苯二甲酸二丁酯(增塑剂)进行手动捏合,并且测试了聚碳酸酯颗粒的热稳定性和阻尼性能。实验表明:溶解-反沉淀时最佳反应温度是50℃,搅拌速率是80 r/min,聚碳酸酯粗颗粒的回收率可达到94%以上。混合液分离时加水量最好是70%,1,2-二氯乙烷回收率达到58%。对处理过程中产生的废水测定了COD、总磷、氨氮,混合液分离2次后,COD明显降低。聚碳酸酯粗颗粒、抗坏血酸和邻苯二甲酸二丁酯配比为6∶1∶6时捏合效果比较好,能够捏合出理想的形状。在加入抗氧化剂、增塑剂后,高温下聚碳酸酯的热稳定性更好。回收的聚碳酸酯适合用作阻尼材料,而且阻尼性能偏好。
Aiming at the chemical treatment of waste disc, the optimal experimental conditions (temperature, stirring rate) and 1,2-bis The optimum amount of water was added to the ethyl acetate-ethanol mixture when it was separated by water. Subsequently, ascorbic acid (anti-oxidant) and dibutyl phthalate (plasticizer) were manually kneaded into the coarse polycarbonate pellets, and polycarbonates Thermal Stability and Damping Properties of Ester Particles. Experiments show that the optimum reaction temperature is 50 ℃, the stirring rate is 80 r / min, the recovery rate of coarse particles of polycarbonate can reach 94%. The amount of water added to the mixture is preferably 70% and the recovery of 1,2-dichloroethane is 58%. COD, total phosphorus and ammonia nitrogen were measured for the wastewater generated during the treatment. After the mixture was separated twice, the COD decreased obviously. Polycarbonate coarse particles, ascorbic acid and dibutyl phthalate ratio of 6: 1: 6 when the kneading effect is better, able to knead the ideal shape. After adding antioxidants and plasticizers, the thermal stability of polycarbonate is better at high temperature. Recycled polycarbonate is suitable as a damping material, and damping properties are preferred.