私密直播全婐app免费大渔直播,国产av成人无码免费视频,男女同房做爰全过程高潮,国产精品自产拍在线观看

相關鏈接
聯系方式
  • 通信地址:廣西桂林市桂林理工大學材料科學與工程學院
  • 郵編:541004
  • 電話:0773-5896438
  • 傳真:
  • Email:gfzzhouli@gmail.com
當前位置:> 首頁 > 論文著作 > 正文
Preparation and properties of hydroxylated styrene-butadiene-styrene tri-block copolymer/multi-walled carbon nanotubes nanocomposites via covalent bond
作者:Guoliang Wu, Li Zhou, Encai Ou, Yanyan Xie, Yuanqin Xiong, Weijian Xu
關鍵字:SBS,Multi-walled carbon nanotubes,Nanocomposites,Covalent bond
論文來源:期刊
具體來源:Materials Science and Engineering A 2010, 527, 5280-5286
發表時間:2010年
In this study, styrene-butadiene-styrene tri-block copolymer (SBS)/multi-walled carbon nanotubes (MWCNTs) nanocomposites were prepared by means of a solution processing method. To enhance the compatibility between SBS and MWCNTs, the hydroxylated styrene-butadiene-styrene tri-block copolymer (HO-SBS) and the acyl chloride-activated MWCNTs (MWCNTs-COCl) were used to replace SBS and MWCNTs, respectively. The pristine MWCNTs were chemically oxidized by a mixture of H2SO4 and HNO3 and then reacted with thionyl chloride to functionalize them with acyl chloride groups. The resulting nanocomposites have been characterized by the testing of gel fraction and degree of swelling, Raman spectra, FTIR, SEM, TEM, DSC, TGA, and Instron mechanical tester. The results of gel fraction and degree of swelling show that the HO-SBS/MWCNTs nanocomposites have cross-linked structure and exhibit high solvent resistance. The results of Raman spectra and FTIR indicate that there are ester groups on the surface of MWCNTs. The results of SEM, TEM, and DSC show that the well-dispersed MWCNTs not only disturb the microphase-separated structure of HO-SBS but also decrease its order-disorder transition temperature, and the presence of MWCNTs could lead to an increase of glass transition temperatures of PB domains. In addition, mechanical tests reveal that dispersion of MWCNTs-COCl via covalent bond in polymer matrix is a useful method to regulate mechanical properties of the HO-SBS.
主站蜘蛛池模板: 乌兰浩特市| 凤凰县| 山阳县| 尼木县| 土默特右旗| 施甸县| 隆回县| 永胜县| 隆德县| 岳西县| 盐源县| 碌曲县| 九龙城区| 密云县| 海宁市| 武城县| 正阳县| 武汉市| 牡丹江市| 兰西县| 阿巴嘎旗| 安宁市| 广宁县| 沂水县| 内丘县| 西宁市| 沂源县| 本溪市| 乐东| 揭东县| 呼和浩特市| 阿勒泰市| 固原市| 上高县| 高尔夫| 陕西省| 枝江市| 靖州| 龙川县| 新平| 绩溪县|