MMT对WPC吸水前后拉伸及弯曲性能的影响  

Effect of MMT on Tensile and Bending Properties of WPC Before and After Water Absorption

作　　者：李湘 方松刚 LI Xiang;FANG Songgang(Hunan Chemical Vocational Technology College,Zhuzhou,Hunan 412000,China)

机构地区：[1]湖南化工职业技术学院,湖南株洲412000

出　　处：《塑料》2023年第3期39-42,47,共5页Plastics

基　　金：湖南省教育厅资助科研项目(21C1101)。

摘　　要：木粉经过NaOH溶液处理后,表面出现了孔洞结构,用处理后的木粉与PP废玩具塑料(X-PP)制备的木塑复合材料(WPC),其内部的木粉和X-PP的界面连接性与未处理的相比较好;在WPC中加入蒙脱土(MMT),复合材料的拉伸强度、弯曲强度和弯曲模量均升高,断裂伸长率和吸水性降低,添加5%的MMT,复合材料的拉伸强度、弯曲强度和模量分别为19.3、29.1和2 410.1 MPa,与未添加的WPC相比,分别提高了12.2%、6.6%和7.6%;吸水后,WPC的拉伸强度、弯曲强度和弯曲模量从16.1、26.4和2 130.2 MPa分别下降至14.2、21.2和1 732.1 MPa,添加MMT可以有效降低WPC吸水后性能的下降率。当添加5%的MMT时,WPC吸水后的拉伸强度、弯曲强度和模量的下降率分别从9.8%、12.8%和13.4%下降至3.6%、5.2%和5.5%。After treated with NaOH solution,the surface of wood powder showed a hole structure.The interfacial connectivity between wood powder and X-PP was better than that of untreated wood powder in the WPC prepared by treated wood powder and PP waste toy plastic(X-PP).When MMT was added to WPC,the tensile strength,bending strength and modulus of the composite were increased,while the elongation at break and water absorption were decreased.The tensile strength,bending strength and modulus of the composite with 5%MMT were 19.3,29.1 and 2410.1 MPa,respectively,which were increased by 12.2%,6.6%and 7.6%compared with the WPC without MMT.After water absorption,the tensile strength,bending strength and bending modulus of WPC decreased from 16.1 MPa,26.4 MPa and 2130.2 to 14.2,21.2 and 1732.1 MPa,respectively,and the addition of MMT could effectively reduce the performance decline rate of WPC after water absorption.When 5%MMT was added,the reduction rates of tensile strength,bending strength and modulus of WPC after water absorption decreased from 9.8%,12.8%and 13.4%to 3.6%,5.2%and 5.5%,respectively.

关 键 词：木粉 PP废玩具塑料 木塑复合材料 蒙脱土 性能下降率 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]