二乙基次磷酸铝/次磷酸铝对天然橡胶/顺丁橡胶复合材料性能的影响  

Effects of aluminum diethylphosphinate/aluminum hypophosphite on the properties of natural rubber/butadiene rubber composites

作　　者：徐立杰 李嵩 李琳 XU Lijie;LI Song;LI Lin(School of Polymer Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,China)

机构地区：[1]青岛科技大学高分子科学与工程学院,山东青岛266042

出　　处：《山东科学》2024年第3期66-75,共10页Shandong Science

基　　金：国家自然科学基金资助项目(51603111,5170311);山东省自然科学基金面上项目(ZR2021ME107);中国博士后科学基金项目(2022M721903,2021M700553,2020M672014)。

摘　　要：将二乙基次磷酸铝(ADP)和次磷酸铝(ALHP)两种阻燃剂引入到天然橡胶(NR)/顺丁橡胶(BR)中制备复合材料,比较两种阻燃剂对复合材料加工特性、物理性能、阻燃性、力学性能及耐磨性的影响。结果表明,两种阻燃剂均可延迟复合材料的硫化,提高门尼黏度,其中添加ADP的复合材料提升更为明显。两种阻燃剂均可降低复合材料的回弹性、拉伸强度、拉断伸长率及撕裂强度,但会提高复合材料的硬度。当ADP和ALHP添加量为45份时,复合材料的极限氧指数(LOI)分别从22.1%提升到28.7%和24.5%。两种阻燃剂均对耐磨性产生不利影响,ADP和ALHP用量为45份时,复合材料的磨耗量分别增加100%和85%。石墨烯(GE)作为成炭剂用于含ADP的复合材料时,可提升阻燃性,同时不影响耐磨性。综上,ADP和ALHP不同程度地影响着NR/BR复合材料的性能,由于ADP碳含量高以及受热挥发,极大程度提升NR/BR复合材料阻燃性,但拉伸强度和耐磨性低于含ALHP的复合材料。The flame retardants aluminum diethylphosphinate(ADP)and aluminum hypophosphite(ALHP)were introduced into natural rubber(NR)and butadiene rubber(BR)to prepare the composites.In this study,we compared the effects of the two flame retardants on the processing characteristics,physical properties,flame retardancy,mechanical properties,and abrasion resistance of the composites.Results showed that both flame retardants delayed the vulcanization of the composites,increased the Mooney viscosity.ADP exhibited a more evident increase in Mooney viscosity than ALHP.When ADP and ALHP was added at 45 phr,the limiting oxygen index(LOI)of the composites increased from 22.1%to 28.7%and 24.5%,respectively.The addition of ADP and ALHP reduced the rebound resilience of the composites,but increased hardness of it.The flame retardants reduced the tensile strength,elongation at break,and tear strength of the composites.Both flame retardants had an adverse effect on the abrasion resistance,with the abrasion loss of the composites increasing by 100%and 85%at 45 phr of ADP and ALHP,respectively.When graphene is used as a carbonization agent for ADP-containing composites,it can improve the flame retardancy without affecting the abrasion resistance.ADP and ALHP have different degrees of influence on the properties of NR/BR composites.Due to the high carbon content of ADP and volatilization by heat,the flame retardancy of NR/BR composites is greatly improved.But the tensile strength and abrasion resistance of the composites are lower than that of the ALHP-containing composites.

关 键 词：磷系阻燃剂 天然橡胶 顺丁橡胶 阻燃性 耐磨性 

分 类 号：TQ330.7[化学工程—橡胶工业]