Effect of thermal annealing on the linear birefringence of polystyrene, polypropylene and cellulose acetate polymers

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• 作者：M. Medhat^a ; ^{mmedhat61@hotmail.com} ; S.Y. El-Zaiat^a ; ^{syelzaiat@hotmail.com} ; ^{eelzaiat@hotmail.com} ; H. Ramadan^b ; ^{hassram2000@yahoo.com} ; M. Abdelghaffar^b ; ^{mai_makawy2000@yahoo.com}
• 关键词：Polymers ; Thermal annealing ; Linear birefringence ; Birefringence dispersion and atomic parameters
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：131
• 期：Complete
• 页码：490-496
• 全文大小：580 K
• 卷排序：131

文摘

An interferometric method was used for investigating the effect of thermal annealing on the linear birefringence and its dispersion of 3 polymers. The annealing temperatures were 80, 60, 40 and 20 °C below the melting point of the used polymers. Two atomic parameters: the resonance wavelength, λo, and the oscillator parameters difference, Δ(NF) for the three polymers were deduced. It’s found that, as the annealing temperature increases, both Δn and Δ (NF) decrease.while λo increases.