封端指的是一个基团与端基反应。
但是, 用硅烷化试剂封端(End-capping)在多数情况下并不能完全覆盖表面硅羟基, 而且此种情况下的封端基团在色谱过程中很容易被洗脱下来[6].
基于46个网页-相关网页
When hydroxyalkyl terminated polysiloxanes are used to modify WPU,hydrolysis resistance performance can be reached because of the Si-C-O bond formation.
而用羟烃基封端聚硅氧烷则得到的是Si-C-O键型,耐水解性好。
参考来源 - 有机硅改性水性聚氨酯的研究The results showed that termination had little influence on thermal properties.
实验表明:封端后对产品热性能影响不大。
参考来源 - 溴化环氧树脂的合成与性能研究·2,447,543篇论文数据，部分数据来源于NoteExpress
带水剂、封端剂及其配比对产品粘度、溶解性、颜色等影响不大；
Water-taking agent, capping agent and their ratio didn't largely affect the viscosity, solubility and colourity of product.
讨论了封端剂用量、反应温度和时间等因素对封端反应的影响问题。
The effects of amounts of blocking agent, temperature and time on the blocking reaction were studied.
研究了水溶性封端聚氨酯丝绸整理剂的应用工艺，并探讨了其防皱机理。
Application process of water soluble capped polyurethane finishing agent for silk was studied and its anti-crease mechanism investigated.
应用推荐