Study on thermal properties of polyurethane nanocomposites based on organo-sepiolite

被引：68
作者：
Chen, Hongxiang [1 ]
Lu, Huizhen [1 ]
Zhou, Yu [1 ]
Zheng, Maosheng [2 ]
Ke, Changmei [1 ]
Zeng, Danlin [1 ]
机构：
[1] Wuhan Univ Sci & Technol, Coll Chem Engn & Technol, Hubei Key Lab Coal Convers & New Carbon Mat, Wuhan 430081, Hubei, Peoples R China
[2] NW Univ Xian, Inst Condensed Phys & Mat, Xian 710069, Peoples R China
来源：
POLYMER DEGRADATION AND STABILITY | 2012年 / 97卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Polyurethane; Sepiolite; Nanocomposite; Thermal properties; BEHAVIOR; MORPHOLOGY; SILICATE; TUNNELS; RUBBER; WATER;
D O I：
10.1016/j.polymdegradstab.2011.12.025
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The effects of sepiolite modified with gamma-aminopropyltriethoxylsilane (KH550-Sp) on thermal properties of polyurethane (PU) nanocomposites were investigated by differential scanning calorimetry (DSC), thermogravimetric analysis (TG), attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), and tensile test. The DSC results showed that the glass transition temperature of hard segments in PU/KH550-Sp nanocomposite increased with the increase of KH550-Sp, because sepiolite restricted the formation of hydrogen bonding within hard segments of polyurethane. TG results revealed that the thermal stability of PU was improved by KH550-Sp, and the onset decomposition temperature for PU nanocomposites with a KH550-Sp content of 3 wt% was about 20 degrees C higher than that for pure PU. The tensile properties of pure PU and nanocomposites before and after ageing 120 degrees C for 72 h were determined, and it was observed that the percentage loss in tensile strength decreased with the addition of KH550-Sp because of an oxidation barrier of KH550-Sp confirmed by ATR-FTIR. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：242 / 247
页数：6
相关论文
共 34 条
[1]   Titania-Sepiolite nanocomposites prepared by a surfactant templating colloidal route [J].
Aranda, Pilar ;
Kun, Robert ;
Martin-Luengo, M. Angeles ;
Letaief, Sadok ;
Dekany, Imre ;
Ruiz-Hitzky, Eduardo .
CHEMISTRY OF MATERIALS, 2008, 20 (01) :84-91
[2]   Effect of chemical structure on combustion and thermal behaviour of polyurethane elastomer layered silicate nanocomposites [J].
Berta, M ;
Lindsay, C ;
Pans, G ;
Camino, G .
POLYMER DEGRADATION AND STABILITY, 2006, 91 (05) :1179-1191
[3]   Permeation characteristics and modeling of barrier properties of multifunctional rubber nanocomposites [J].
Bhattacharya, Mithun ;
Biswas, Subharanjan ;
Bhowmick, Anil K. .
POLYMER, 2011, 52 (07) :1562-1576
[4]   Effect of filling mixtures of sepiolite and a surface modified fumed silica on the mechanical and swelling behavior of a styrene-butadiene rubber [J].
Bokobza, Liliane ;
Leroy, Eric ;
Lalanne, Valerie .
EUROPEAN POLYMER JOURNAL, 2009, 45 (04) :996-1001
[5]   Heavy metal adsorption by functionalized clays [J].
Celis, R ;
Hermosín, MC ;
Cornejo, J .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2000, 34 (21) :4593-4599
[6]   Characterization and properties of sepiolite/polyurethane nanocomposites [J].
Chen, Hongxiang ;
Zheng, Maosheng ;
Sun, Hongying ;
Jia, Qingming .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 445 :725-730
[7]   Influence of organic modification on the structure and properties of polyurethane/sepiolite nanocomposites [J].
Chen Hongxiang ;
Zeng Danlin ;
Xiao Xiaoqin ;
Zheng Maosheng ;
Ke Changmei ;
Li Yanjun .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2011, 528 (03) :1656-1661
[8]   Studies on the first DSC endotherm of polyurethane hard segment based on 4,4′-diphenylmethane diisocyanate and 1,4-butanediol [J].
Chen, TK ;
Shieh, TS ;
Chui, JY .
MACROMOLECULES, 1998, 31 (04) :1312-1320
[9]   Novel role of polymer-solvent and clay-solvent interaction parameters on the thermal, mechanical and optical properties of polymer nanocomposites [J].
Choudhury, Anusuya ;
Bhowmick, Anil K. ;
Ong, Christopher .
POLYMER, 2009, 50 (01) :201-210
[10]   Thermal oxidation of polybutadiene.: part 2:: Mechanistic and kinetic schemes for additive-free non-crosslinked polybutadiene [J].
Coquillat, M. ;
Verdu, J. ;
Colin, X. ;
Audouin, L. ;
Neviere, R. .
POLYMER DEGRADATION AND STABILITY, 2007, 92 (07) :1334-1342
1234