配位交联丁腈橡胶/硫酸铝复合材料的制备与表征  

Preparation and Characterization of Coordination Crosslinking NBR/Aluminum Sulfate Composite Materials

作　　者：汪扬涛 曾安蓉[1,2] 王小君 陈婷 张青海 WANG Yangtao;ZENG Anrong;WANG Xiaojun;CHEN Ting;ZHANG Qinghai(School of New Materials and Shoes&Clothing Engineering,Liming Vocational University,Quanzhou 362000,China;Advanced Polymer Materials Fujian Application Technology Collaborative Innovation Center,Quanzhou 362000,China)

机构地区：[1]黎明职业大学新材料与鞋服工程学院,福建泉州362000 [2]先进高分子材料福建省应用技术协同创新中心,福建泉州362000

出　　处：《广东轻工职业技术大学学报》2025年第2期7-11,共5页Journal of Guangdong Industry Polytechnic university

基　　金：福建省中青年教师教育科研项目(JAT191458)。

摘　　要：为研究丁腈橡胶(NBR)的配位交联,以十八水合硫酸铝(Al_(2)(SO_(4))_(3)·18H_(2)O)为交联剂,采用机械共混和模压成型方法制备了一种NBR/硫酸铝复合材料,采用X射线光电子能谱对配位交联结构进行表征,并分析了不同Al_(2)(SO_(4))_(3)·18H_(2)O含量的NBR/硫酸铝复合材料的动态热机械性能、溶胀性能、力学性能和微观形貌。结果表明:NBR/硫酸铝复合材料交联后的XPS能谱(N 1s)增加了一个高结合能峰,且储能模量因发生交联反应而增大,NBR和Al_(2)(SO_(4))_(3)·18H_(2)O的相界面由于界面作用良好变得模糊,这是由于腈基和Al3+发生配位反应产生交联键所致;随着Al_(2)(SO_(4))_(3)·18H_(2)O用量增加,NBR/硫酸铝复合材料的交联密度增大,耐溶胀性能、拉伸强度和硬度提高,但断裂伸长率因Al_(2)(SO_(4))_(3)·18H_(2)O团聚使柔韧性变差而下降;当Al_(2)(SO_(4))_(3)·18H_(2)O用量为20份时,NBR/硫酸铝复合材料的交联密度为12.24×10^(5)υ/mol·cm^(-3),拉伸强度为2.49 MPa,邵氏硬度为58 HA,断裂伸长率为556%,综合性能优于硫黄硫化NBR。In order to study the coordination crosslinking of nitrile rubber(NBR),with Al_(2)(SO_(4))_(3)·18H_(2)O as crosslinking agent,coordination crosslinking NBR/aluminum sulfate composite material were prepared by mechanical blending and compression molding.The coordination crosslinking structure was characterized by X ray photoelectron spectroscopy(XPS),and the dynamic thermo mechanical properties(DMA),swelling properties,mechanical properties,and microstructure of NBR/aluminum sulfate composites with different Al_(2)(SO_(4))_(3)·18H_(2)O contents were analyzed.The results show that the energy storage module of NBR/aluminum sulfate blends increases due to crosslinking reaction forming a cross-linked network structure,and the XPS spectrum(N 1s)after cross-linking increases by a high binding energy peak,the phase interface between NBR and Al_(2)(SO_(4))_(3)·18H_(2)O becomes blurred due to good interfacial interaction,which is caused by the coordination reaction between nitrile group and Al3+to produce crosslinking bonds.With the increase of Al_(2)(SO_(4))_(3)·18H_(2)O content,the crosslinking density of NBR/aluminum sulfate composite material increases,the swelling resistance,tensile strength and hardness improve,while the elongation at break decreases,but the agglomeration of Al_(2)(SO_(4))_(3)·18H_(2)O leads to a decrease in flexibility,resulting in a decrease in elongation at break.When the Al_(2)(SO_(4))_(3)·18H_(2)O content is 20 parts,the crosslinking density is 12.24×10^(5)υ/mol·cm^(-3),the tensile strength is 2.49 MPa,the Shore hardness is 58 HA,and the elongation at break is 556%,which is better than sulfur vulcanized NBR.

关 键 词：配位交联 丁腈橡胶 硫酸铝 复合材料 

分 类 号：TQ333.7[化学工程—橡胶工业]