无水CaSO_4晶须超声负载β成核剂对聚丙烯力学性能与结构的影响  

Effects of anhydrous CaSO_4 whisker ultrasonic technoloy load β nucleating agent on mechanical properties and structure of polypropylene

作　　者：杨靖[1] 陈彤[1] 吕晴[1] 田瑤珠 秦军[1] 

机构地区：[1]贵州大学国土资源部喀斯特环境与地质灾害重点实验室,贵阳550025 [2]贵州大学材料与冶金工程学院,贵阳550025

出　　处：《复合材料学报》2018年第2期267-274,共8页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(21266005);贵州省科技厅联合基金(黔科合LH字[2014]7648)

摘　　要：利用超声技术对无水CaSO_4晶须(CaSO_(4W))负载NB-328酰胺类β成核剂(βNB)进行改性制备CaSO_(4W)超声负载βNB增强聚丙烯(PP)复合材料(UCaSO_(4W)-βNB/PP),研究了CaSO_(4W)超声负载βNB对UCaSO_(4W)-βNB/PP复合材料力学性能的影响,运用DSC和SEM对其影响因素进行探讨。研究表明,利用超声技术对CaSO_(4W)负载βNB进行改性能大幅度提高UCaSO_(4W)-βNB/PP复合材料冲击性能,与纯PP相比,提高幅度为56.1%~124.1%,而未超声的CaSO_(4W)负载βNB与PP共混的复合材料CaSO_(4W)-βNB/PP及βNB与PP直接共混的βNB/PP复合材料冲击韧性降低。DSC与SEM分析表明,βNB/PP、CaSO_(4W)-βNB/PP和UCaSO_(4W)-βNB/PP复合材料中β晶含量变化与βNB的添加量有关,CaSO_(4W)及βNB对PP β晶含量存在拮抗作用,UCaSO_(4W)-βNB/PP复合材料冲击性能提高的主要原因并不是PP β晶含量变化,而是与超声处理CaSO_(4W)和βNB有关。By using ultrasonic technology to prepare anhydrous CaSO4 whisker loaded amides β nucleating agent（βNB）for making polypropylene（PP）composites,the mechanical properties of PP composites were studied,and the influencing factors were explored by DSC and SEM.The results show that using ultrasonic technology to treat CaSO4W load βNB can greatly improve the impact toughness of the blending of ultrasonic CaSO4（UCaSO4W）loaded βBN and PP composites by 56.1%-124.1% compared with pure PP,while untreated CaSO4W loaded βNB and βNB alone with βNB/PP composites without this effect.DSC and SEM analysis show that the changes of PP beta crystal content in th eβNB/PP,CaSO4W-βNB/PP and UCaSO4W-βNB/PP composites are related to the addition of βNB content,CaSO4W and βNB existed antagonism action on PP beta crystal effect;the main cause of the improvement of the impact performance is not the change of PP beta crystal content,but the processing of ultrasonic CaSO4W and βNB.

关 键 词：无水CaSO4晶须 Β成核剂 聚丙烯 超声负载 力学性能 结晶性能 

分 类 号：TB331[一般工业技术—材料科学与工程] X705[环境科学与工程—环境工程]