低模量高伸长率室温硫化水性硅酮密封胶的研制   总被引：1，自引：0，他引：1       下载免费PDF全文

彭忠利  王海鹰  伍青  王跃林 《惠州学院学报》2005,25(3):1-6

以聚硅氧烷乳液为基料, 加入适量的交联剂、增粘剂、催化剂、填料制备了低模量高伸长率室温硫化水性硅酮密封胶, 该密封胶的哑铃型拉伸试样和H 型粘接拉伸试样的模量(100 %定伸应力) 小于014MPa , 哑铃型试样断裂伸长率达1000 %以上, H 型粘接拉伸试样(对玻璃、铝材和石材) 断裂伸长率大于500 % , 并显示为胶内聚破坏.  相似文献   

外墙涂料基料—硅丙乳液的制备及表征     

胡晓熙  王芸  黄宝章  龚立兵  黄建德 《钦州师范高等专科学校学报》2013,(8):24-28

以丙烯酸丁酯、甲基丙烯酸甲酯、八甲基环四硅氧烷为单体,通过乳液聚合制得了有机硅-丙烯酸酯共聚物,探讨了影响乳液性能的因素,确定了乳液聚合的最佳反应条件.  相似文献   

溶胶-凝胶法原位生成SiO_2改性硅基耐烧蚀材料     

姚汝亮  张炜  周达 《中国新闻周刊》2009,(2)

建立了在硅基耐烧蚀材料中用溶胶-凝胶法原位生成SiO2的方法.首先将硅橡胶、气相白炭黑、纤维等原料混炼硫化制备出硫化胶.然后将硫化胶依次浸入四氢呋喃、原硅酸乙酯和正丁基胺水溶液中进行预溶胀处理、物理扩散和化学反应,得到原位生成SiO2.SEM照片显示,在硅基耐烧蚀材料中原位生成的SiO2颗粒呈球形,粒径在40~60 nm,但分布不均匀,在硫化胶表层存在富集现象.实验结果表明,原位生成SiO2平均含量增加,硅基耐烧蚀材料的抗拉强度增加,线烧蚀率下降;含13.7%原位生成SiO2硅基耐烧蚀材料抗拉强度为5.82 MPa,线烧蚀率为0.071 mm/s.  相似文献   

Development of a non-cable whole tectorial membrane micro-robot for an endoscope     

Dong-dong Ye  Guo-zheng Yan  Kun-dong Wang  Guan-ying Ma 《浙江大学学报(A卷英文版)》2008,9(8):1141-1149

A novel non-cable whole tectorial membrane micro-robot for an endoscope is developed. The micro-robot we have fabricated and tested can propel itself in the intestine tract of a pig in an autonomous manner by earthworm-like locomotion. The silicone of bellow shape is laid over the outer surface of the micro-robot to reduce the affection of the viscoelastic properties of the intestine. Wireless power transfer and communication systems are employed to realize the non-cable locomotion of the micro-robot. The prototype of the micro-robot is 13.5 mm in diameter and 108 mm in length. The experimental results show that the towing force for the micro-robot is about 0.8 N, which is much smaller than the maximum driving force 2.55 N of the linear actuator. The supplying power of the wireless power transfer system fulfills the needs of the micro-robot system and the micro-robot can creep reliably in the large intestine of a pig and other contact environments.  相似文献