摘要
采用先插层后接枝的"两步法",将十二烷基硫酸钠(SDS)和半加成物异佛尔酮二异氰酸酯-丙烯酸羟乙酯(IPDI-HEA)先后引入层状双氢氧化物(LDH)中,制备得到层间含有UV固化型丙烯酸酯基团的有机改性LDH.随后在UV光辐照下,LDH层间丙烯酸酯活性基团参与UV固化反应,通过原位聚合法得到完全剥离的聚合物/LDH纳米复合材料.通过X-射线衍射(XRD)和红外分析(FTIR)证明了LDH的插层改性结构;透射电镜(TEM)证实了LDH以纳米级剥离分散于聚合物基体中.并对复合材料的热稳定性和机械性能进行了研究,发现当LDH在复合材料中含量为5%时,起始分解温度较纯聚合物上升64.6 K,最终残余量从4.0%上升到8.7%,而拉伸强度也从原来的8.5 MPa上升至14.7 MPa,其综合性能远优于未复合LDH的UV固化型聚合物.
Organic layered double hydroxide（ LDH） modified with UV curing acrylate group was synthesized by ＂two steps＂method,which was first intercalated with sodium dodecyl sulfate（ SDS） and then grafted by semiadduct of isophorone diisocyanate and 2-hydroxyethyl acrylate（ IPDI-HEA）. The reactive groups of the LDH would join in the UV curing reaction when exposed to the UV lamp,obtaining the exfoliated polymer /LDH nanocomposites via in situ polymerization. The X-ray diffraction（ XRD） and Fourier transform infrared（ FTIR） analyses were used to confirm the formation of modified LDH. Transmission electron microscope（ TEM） observation of UV-cured nanocomposites indicated the exfoliated microstructure of LDH in the matrix of polymer. The thermal stability and mechanical properties were also measured. The results showed that the onset decomposition temperature of nanocomposite with 5% LDH loading increased by 64. 6 K compared to the pure polymer,while the residual char increased to 8. 7% from 4. 0%. Also the tensile strength were enhanced to 14. 7 MPa compared with 8. 5 MPa of the pure polymer. As a result,the combination properties of UV-cured polymer / LDH showed great enhancements in comparison with polymer without LDH addition.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2013年第12期1531-1536,共6页
Acta Polymerica Sinica
基金
中央高校基本科研业务费专项资金(项目号JUSRP1021)资助项目
