CAJ | 학술논문

通过广角X射线衍射仪、差示扫描量热仪测试导电炭黑/聚酯(CB/PET)复合材料的结晶行为,应用Avrami 方程分析其等温结晶动力学.结果表明:CB/PET比纯PET具有更完善的结晶和更高的结晶度;随着结晶温度的升高以及CB质量分数的增加,CB/PET的结晶速率明显提高;与纯PET相比,CB/PET的结晶速率、晶粒尺寸和结晶度增加;Avrami参数(n,K,t_(1/2))对结晶温度非常敏感,n、K随着温度的升高而增加,而t_(1/2)随温度的升高而减小,在相同的结晶温度下,n、t_(1/2)都随着CB质量分数的增加而减小.
통과엄각X사선연사의、차시소묘량열의측시도전탄흑/취지(CB/PET)복합재료적결정행위,응용Avrami 방정분석기등온결정동역학.결과표명:CB/PET비순PET구유경완선적결정화경고적결정도;수착결정온도적승고이급CB질량분수적증가,CB/PET적결정속솔명현제고;여순PET상비,CB/PET적결정속솔、정립척촌화결정도증가;Avrami삼수(n,K,t_(1/2))대결정온도비상민감,n、K수착온도적승고이증가,이t_(1/2)수온도적승고이감소,재상동적결정온도하,n、t_(1/2)도수착CB질량분수적증가이감소.
The crystallization property of the conductive carbon black/polyester (CB/PET) composites was tested by wide angle X-ray diffractometer and differential scanning calorimetry,and the kinetics of isothermal crystallization was analyzed with Avrami equation.The results showed that CB/PET has more perfect crystals and higher crystallinity degree than pure PET.The crystallization rate of CB/PET increases obviously with increasing of crystallization temperature and mass fraction of CB in composites.Compared with pure PET,the crystallization rate,the crystallite size and the crystallinity degree of CB/PET have been increased.The Avrami parameters (n,K,and t_(1/2)) are very sensitive to the crystallization temperature,and the values of n and K for PET and CB/PET are found to increase with increasing of the temperature while t_(1/2) decreases.At the same crystallization temperature for all the samples,both n and t_(1/2) go down with increasing of the mass fraction of CB in composites.