کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1653536 | 1007664 | 2007 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Crystallization behaviors of secondarily quenched Nylon 6 Crystallization behaviors of secondarily quenched Nylon 6](/preview/png/1653536.png)
We observed a very unusual crystallization behavior in Nylon 6 by X-ray diffraction. The melted Nylon 6 films were quenched in oil baths with different temperatures for isothermal crystallization. When the Nylon 6 films were isothermally crystallized above 180 °C for 30 min and then quenched in ice water, three sharp diffraction peaks at 2θ = 9.4, 18.95 and 28.5° were observed in X-ray diffraction patterns. No diffraction peaks could be found at 2θ = 9.4, 18.95 and 28.5° from a series of calculated 2θ values for the α, γ, β and pleated α form crystals of Nylon 6. The locations of these peaks do not correspond with calculated 2θ values. When the film was slowly cooled from the melt state to 180 °C and was maintained at 180 °C for 30 min and then quenched to 0 °C, it could be found that these three reflections disappeared. If the Nylon 6 film isothermally crystallized at 180 °C for 30 min was not quenched to room temperature, but cooled to room temperature in air, these three diffraction peaks could not be observed.
Journal: Materials Letters - Volume 61, Issue 3, February 2007, Pages 925–928