high density polyethylene glass paper 高密度聚乙烯玻璃纸
It is observed by SEM that glass fiber has smooth surface, low crystallization, high density of fracture and shellfish veins of fracture obviously submits ditch form.
用SEM观察到玻璃纤维的表面光滑、低析晶、断口质密度高、断口贝纹呈明显沟状。
But due to the high density of glass, and easily broken, so life is not long.
怛是由于玻璃的密度较大，并且容易破碎，所以使用寿命不长。
The results shows that epoxy resins containing rigid rod structure or many epoxy groups have a high glass transition temperature (Tg) because of high cross-linking density.
研究结果表明：分子结构中含有刚性结构或连有较多的环氧基时，固化产物具有较高的交联密度，玻璃化转变温度较高；
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