摘要
为研究硫酸钡(BaSO_(4))在聚对苯二甲酸乙二醇酯(PET)中的分散性对材料性能的影响,使用硬脂酸镁和邻苯二甲酸二辛酯对BaSO_(4)进行表面处理,通过HAKEE双螺杆采用熔融共混法制备了BaSO_(4)/PET复合材料。通过扫描电镜(SEM)、万能试验机和摆锤冲击仪等方法研究了BaSO_(4)的粒径和表面处理对BaSO_(4)/PET复合材料微观结构和力学性能的影响。实验结果表明:BaSO_(4)/PET复合材料的拉伸和冲击强度随着BaSO_(4)粒径的减小而增加,这归因于BaSO_(4)与PET基体之间界面接触面积的增加和界面黏附力的增强。邻苯二甲酸二辛酯处理的BaSO_(4)/PET复合材料具有优于未处理和硬脂酸镁处理的BaSO_(4)/PET复合材料的拉伸和冲击强度,最高冲击强度达53.37 J/m,是纯PET材料的1.5倍。另外,通过建立经验模型,计算了界面相互作用参数B和脱黏角θ,表征了BaSO_(4)颗粒与PET基体的界面黏附性能,邻苯二甲酸二辛酯改性BaSO_(4)/PET复合材料的B值最大,θ值最小,表面改性可以提高硫酸钡和PET之间的界面黏附性能,BaSO_(4)/PET复合材料的力学性能也得到提升。
In order to study the effect of the dispersion of barium sulfate particles in polyester on the properties,surface treatment of BaSO_(4) was carried out using magnesium stearate or dioctyl phthalates,and nano BaSO_(4)/PET composites were prepared by HAKEE twin-screw melt blending method.The influence of BaSO_(4) particle size and surface treatment on the microstructure and mechanical properties of BaSO_(4)/PET composite materials by melt blending method were studied by SEM,universal testing machine,and pendulum impact tester.The tensile and impact strength of BaSO_(4)/PET increased significantly with the decrease of BaSO_(4) particle size,which was attributed to the increase in interfacial contact area and enhanced interfacial adhesion between BaSO_(4) particles and PET matrix.The nano BaSO_(4)/PET composite material treated with dioctyl phthalates had better tensile and impact strength than untreated or sodium stearate treated BaSO_(4)/PET materials.The impact strength of the nano BaSO_(4)/PET composite material treated with dioctyl phthalates was as high as 53.37 J/m,which was 1.5 times that of pure PET material.The interface interaction parameter B and debonding angleθwere calculated using an empirical model to characterize the interfacial adhesion performance between BaSO_(4) particles and PET matrix.Phthalate-modified BaSO_(4)/PET composites had the largest B value and the lowestθvalue.
作者
石雪龙
Shi Xuelong(Research Institute of Sinopec Yizheng Chemical Fibre Co.,Ltd.,Yizheng Jiangsu 211900,China)
出处
《合成技术及应用》
2025年第4期35-41,共7页
Synthetic Technology & Application
关键词
硫酸钡
PET
界面结构
力学性能
脱黏角
barium sulfate
PET
interface structure
mechanical property
debonding angle corners
