高温型碳酸氢钾发泡剂制备及其在聚丙烯微发泡材料中的应用  

Preparation of high-temperature potassium bicarbonate foaming agent and its application in polypropylene microfoaming materials

作　　者：韩媛迪 邹昀 梁志超 童张法 陈小鹏 廖丹葵 HAN Yuandi;ZOU Yun;LIANG Zhichao;TONG Zhangfa;CHEN Xiaopeng;LIAO Dankui(School of Chemistry and Chemical Engineering,Guangxi Key Laboratory of Petrochemical Resources Processing and Process Strengthening Technology,Guangxi University,Nanning 530004,Guangxi,China;Guangxi Tiandong Jingui Technology Company,Baise 531500,Guangxi,China)

机构地区：[1]广西大学化学化工学院,广西石化资源加工及过程强化技术重点实验室,广西南宁530004 [2]广西田东锦桂科技有限公司,广西百色531500

出　　处：《化工进展》2025年第3期1599-1606,共8页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(52162004);广西石化资源加工及过程强化技术重点实验室主任基金(2021Z011);横向项目(1416312AJS210625034)。

摘　　要：为提高碳酸氢钾的热分解温度,使其满足轻量化高性能聚丙烯微发泡材料的工业化需求,以两性物质铝酸酯偶联剂DL-411(ACA)为改性剂,采用乙醇溶解蒸发法和高温熔融法改性碳酸氢钾(PB),制备高温型碳酸氢钾发泡剂(ACA@PB),并将其应用在聚丙烯微发泡材料加工生产过程中;利用热重(TG)、扫描电子显微镜(SEM)、傅里叶变换红外光谱(FTIR)等表征手段,研究高温熔融法改性碳酸氢钾的热分解性能、较佳制备条件和微观形貌;考察ACA@PB添加量对聚丙烯微发泡材料泡孔分布和力学性能的影响。结果表明,当铝酸酯偶联剂DL-411和碳酸氢钾的质量比为3∶5时,碳酸氢钾的初始热分解温度T_(0)由155.9℃提高至203.9℃,分解温度区间ΔT由78.0℃缩短至40.0℃;当ACA@PB添加量为4%时,聚丙烯微发泡材料拉伸强度为30.30MPa、弹性模量为1.73GPa、断裂伸长率为9.67%、简支梁无缺口抗冲击强度为63.07kJ/m^(2),符合工业化聚丙烯微发泡材料的加工应用要求。Using amphoteric aluminates coupling agent DL-411(ACA)as the modifier,potassium bicarbonate(PB)was modified by ethanol dissolution followed by evaporation and high-temperature melting methods,and the high-temperature potassium bicarbonate foaming agent(ACA@PB)prepared was applied to the production process of polypropylene microfoam materials to meet the functionalization needs of lightweight and high-performance polypropylene microfoam materials.And the thermal decomposition properties,preparation conditions and microcosmic morphology of ACA@PB were investigated by using thermogravimetric(TG),scanning electron microscopy(SEM)and infrared(FTIR)characterization methods.The results showed that when the mass ratio of ACA and PB was 3∶5,the thermal decomposition temperature of PB was increased from 155.9℃to 203.9℃,and the decomposition temperature interval was shortened from 78.0℃to 40.0℃;When the addition amount of ACA@PB was 4%,the tensile strength of polypropylene microfoam was 30.30MPa,the elasticity modulus was 1.73GPa,and elongation at break was 9.67%,the unnotched impact strength of simply supported beam was 63.07kJ/m^(2),which was in line with the processing and application of industrialised polypropylene microfoam.

关 键 词：高温型碳酸氢钾发泡剂 铝酸酯偶联剂DL-411 热分解 分散性 聚丙烯 

分 类 号：TQ32[化学工程—合成树脂塑料工业]