The results shows that the addition of nucleating agents increased the onset temperature and peak temperature and improved crystallization rate of pp 結果表明,兩種成核劑的加入均可提高聚丙烯的結晶起始溫度和結晶峰溫度,并加快結晶速度。
Results of the dsc analysis show that the addition of mcm - 41 do increase the rate of crystallization of pet . the crystallinity of pet / mcm - 41 nanocomposite is much higher compared with other fillers 實驗發現,介孔分子篩mcm對烈5o的填加量與pet共混后可明顯地增加pet的結晶速度。
Automatic temperature coutrol can precisely control the crystalization temperature to ensure grain structure , mechanically controlled casting die speed is used to ensure the density of material 自動溫控系統對結晶溫度實施準確控制以確保晶粒結構(金相)符合要求。機械控制恒定的鑄造結晶速度以保證材質的致密性。
However , the measurement of tga and dsc showed that the thermal stability of the nanocomposites had improved a lot and the crystal speed had also have a slight improvement 但是, tga和dsc分析結果顯示:聚乙烯蒙脫土納米復合材料相對于純聚乙烯來說,熱穩定性有較大幅度提高,同時,復合材料的結晶速度也稍有增加。
Similarly , the impact strength is increased about seven times than that of the pure mc nylon6 . mcm - 41 is also used as the filler material for pet . the effects of mcm - 41 on the crystallinity and the rate of crystallization are obtained 首次提出將孔性材料介孔分子篩mcm作為結晶改善劑名于聚對苯m甲酸乙m酯中,研究它對pet的結晶速度和結晶差這兩方面結晶性能的影響。
Volume shrinkage of sample results in the increasing of the value of the crystallization rate vc and the decreasing the values of the avrami exponent n in the primary crystallization and s , defined as the relative crystallinity degree when experiment data deviate theoretical predicting straight line . compared with the avrami equation , the price equation hardly makes progress on describing the behavior of polymer later stage crystallization 樣品體積收縮,導致avrami指數n值減小;結晶速度v _ c值增加;表示實驗值偏離理論預測直線時的相對結晶度_ s值減小;與avrami方程相比, price方程仍不能較準確地描述高聚物等溫后期結晶行為。