Mechanism of generation of photoelastic birefringence in methacrylate polymers for optical devices

Mechanism of generation of photoelastic birefringence in methacrylate polymers for optical devices
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光学器件用甲基丙烯酸酯聚合物光弹性双折射的产生机制

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发表时间:
2010
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通讯作者:
Y. Koike
Y. Koike
中科院分区:
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作者:
H. Shafiee;A. Tagaya;Y. Koike

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我们阐明了聚(甲基丙烯酸甲酯),聚(甲基丙烯酸乙酯),聚(甲基丙烯酸异丁酯),聚(甲基丙烯酸环己酯),聚(甲基丙烯酸异丙酯),和聚(甲基丙烯酸叔丁酯)的双折射性能。我们证明了导致取向双折射的聚合物分子中的构象变化不同于导致光弹性双折射的构象变化。取向双折射主要取决于高于Tg的甲基丙烯酸酯聚合物的主链的取向。另一方面,在低于Tg的弹性变形中的光弹性双折射主要取决于侧链的取向,而主链几乎不取向。© 2010 Wiley Periodicals,Inc.聚合物科学杂志B部分:聚合物物理48:2029-2037,2010年
We clarified the birefringence properties of poly(methyl methacrylate), poly(ethyl methacrylate), poly(isobutyl methacrylate), poly(cyclohexyl methacrylate), poly(isopropyl methacrylate), and poly(tert-butyl methacrylate). We demonstrated that the conformational change in polymer molecules that causes orientational birefringence differs from that causing photoelastic birefringence. Orientational birefringence depends mainly on the orientation of the main chains of the methacrylate polymers above Tg. On the other hand, photoelastic birefringence in elastic deformation below Tg depends mainly on the orientation of the side chains while the main chains are scarcely oriented. © 2010 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 48: 2029–2037, 2010