【中文8170字】包含二羟基香豆素衍生物的光刺激自修复聚氨酯摘要合成了一种新型的聚氨酯,其中包括异佛尔酮二异氰酸酯,聚乙二醇和光致可逆部分,5,7-双(2 -羟基乙氧基)-4-甲基香豆素。通过利用可逆的光致和香豆素的光切割习惯,聚氨酯可反复交联和去交联的下连续紫外线照射,在350和254纳米。更重要的是在聚氨酯的交联...
Chemicalmisconceptions33 Wordequations Targetlevel Thesematerialsaredesignedforusewith11–14yearoldstudentswhohavebeen taughttousewordequations.Thematerialswillalsobeusefulfor14–16yearolds studentswhoneedtorevisitthistopic. Topic Usingwordequationstorepresentchemicalreactions. Rationale Manystudentsfinditdifficulttowri...
Directions:Writeabalancedchemicalequationtorepresentthechemicalreactiondescribed. 1.Elementalboronisproducedinoneindustrialprocessbyheatingdiborontrioxide(B 2 O 3 )with magnesiummetal.Magnesiumoxideisalsoproducedasaby-productofthisreaction. BalancedEquation