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:江蘇省揚州市四望亭路180號
  • 郵編:225002
  • 電話:0514-87979062
  • 傳真:0514-87979244
  • Email:lxyzhangm@yzu.edu.cn
當前位置:> 首頁 > 論文著作 > 正文
Mechanical properties and creep behavior of poly(trimethylene terephthalate)/mesoporous silica composites
作者:Haiyun Liu, Li Yin, Defeng Wu, Zhen Yao, Ming Zhang, Chong Chen, Pengfei Fu, Jing Qin
關鍵字:poly(trimethylene terephthalate) (PTT); mesoporous silica; composites; mechanical property; viscoelastic behavior.
論文來源:期刊
具體來源:Polymer Composites
發表時間:2015年
The poly(trimethylene terephthalate) (PTT) containing mesoporous silica (SBA-15) prepared by in situpolymerization were used as the master batch in this work and mixed with the commercial PTT to fabricate PTT/mesoporous silica composites. The mechanical properties and viscoelastic behaviors such as creep and creep recovery of as-obtained composite system were then studied in detail. The results reveal an evident reinforcing effect of the mesoporous SBA-15 particles at the lower loading levels. Compared with those of the pure PTT, the tensile strength and impact strength of the composite with 0.5 wt% SBA-15 particles increase by about 26% and 10%, respectively. This is attributed to the physical crosslinking between SBA-15 and PTT chain caused by the mesoporous structure of SBA-15 particle, which is confirmed by the increased glass transition temperature of the composites relative to the pure PTT. At the higher loading levels, however, the presence of mesoporous particle reduces the overall strength of PTT because the concentration of lower molecular weight PTT in the master batch also increases with increasing loading of SBA-15. Therefore, superfluous addition of master batch has negative contribution to the mechanical strength of PTT composites. Besides, the composite system presents the higher creep levels and the lower recovery rates than the pure PTT, indicating that the presence of mesoporous SBA-15 particles restrains the movements of PTT chain segments during creep and creep recovery. This is further confirmed by the viscoelastic model predictions. POLYM. COMPOS., 36:1386–1393, 2015. © 2014 Society of Plastics Engineers
主站蜘蛛池模板: 安龙县| 扎兰屯市| 嵊州市| 馆陶县| 林口县| 邵阳县| 府谷县| 裕民县| 河北省| 秀山| 综艺| 张家口市| 忻州市| 扎赉特旗| 台东县| 漾濞| 习水县| 大英县| 德兴市| 常州市| 博野县| 柯坪县| 云龙县| 黔江区| 上饶县| 航空| 昭通市| 治县。| 临汾市| 黄冈市| 钟祥市| 江山市| 兰州市| 修武县| 明水县| 前郭尔| 新安县| 临猗县| 长岛县| 泾川县| 海盐县|