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Structure and Thermal Degradation Behaviors of PE/LDH Composites(PDF)

《哈尔滨理工大学学报》[ISSN:1007-2683/CN:23-1404/N]

Issue:
2013年05期
Page:
1-5
Research Field:
材料科学与工程
Publishing date:

Info

Title:
Structure and Thermal Degradation Behaviors of PE/LDH Composites
Author(s):
HAN Zhi- dong1 WANG Yue1 LAI Wen- wei1 JIANG Li1 CUI Bing- bing1 CUI Jiu- de2 LIU Shang- yong3
( 1. School of Material Science and Engineering,Harbin University of Science and Technology,Harbin 150040,China; 2. Jiangsu Hengtong
Cable Technology Limited Co. ,Wujiang 215234,China; 3. Guangdong Grid Co. Foshan Power Supply Bureau,Foshan 528000,China)
Keywords:
layered double hydroxidepolyethylenecompositesnanocompositesthermal degradation
PACS:
TQ132. 2; TQ322. 2
DOI:
-
Abstract:
Abstract: Mg- Al layered double hydroxide ( LDH) was modified with sodium dodecyl sulfate ( SDS) by regen-
eration method. Polyethylene /modified LDH composites ( PE /SDS- LDH) were prepared by melt blending and solu-
tion mixing method. Maleated polyethylene ( PEgMA) was used to improve the compatibility between LDH and PE.
The structure and dispersion of LDHs in PE matrix were investigated by X- ray diffraction ( XRD) and scanning e-
lectron microscope ( SEM) ,respectively. Thermal degradation behaviors of PE /SDS- LDH composites were charac-
terized by thermogravimetric analysis ( TGA) . The results reveal that microcomposites ( PE /PEgMA/SDS- LDH)
were obtained by melt blending method and nanocomposites ( PE / ( PEgMA/SDS- LDH) ) were prepared by melt
blending PE with master- batch of SDS- LDH and PEgMA obtained by solution mixing. Due to the thermal decompo-
sition of LDHs at much lower temperature than PE,thermal degradation of composites begins at low temperature re-
gardless of the dispersion of LDH in PE. However,nanocomposites present better thermal stability. Compared with
microcomposites,the nanocomposites present the higher peak temperature and more residues at the end of thermal
degradation,indicating the better barrier properties and charring effects of nano- dispersed LDH.

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Last Update: 2013-12-25