摘要
对铸钢水基涂料触变剂、悬浮剂以及涂料的触变性及触变机制进行了深入研究。实验研究表明:凹凸棒粘土(AP粘土)与钠膨润土(P_(Na))的触变性有显著的差别。即P_(Na)形成的结构破坏很快,而恢复则缓慢;AP粘土的结构破坏、恢复均是一个比较平缓的过程。水基涂料中加入少量的AP粘土能使触变性大大改善,通过对涂料受剪切及恢复两阶段触变行为的深入研究,提出了触变性数学模型。
In this paper, the rheopexy agent, suspension agent of water-based coating of cast steel, and the coatings rheopexys are studied deeply. It isdiscovered that the rhe rheopexy of attapulgite clay (AP clay) is quite differentfrom that of sodium bentonite (P_(Na)).The structure of P_(Na) can damaged easily,and then the structure resumption is very slow. But AP clay's structure can bedamaged and resumed gently. The water-besed coating'srheopexy can be improvedgreatly by the use of AP clay. In this article, the coating's rheopexy behaviours atboth the shear stage and the resumption stage are investigated deeply.Then a ma-thematical model on the rheopexy has been obtained.
