Large Optical Rotatory Power and Light Modulation in Polylactic Acid Film
聚乳酸薄膜中的大旋光力和光调制
基本信息
- 批准号:13650944
- 负责人:
- 金额:$ 2.18万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:2001
- 资助国家:日本
- 起止时间:2001 至 2002
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Polylactic acid, molecules of which contain asymmetric carbon atoms and have a helical orientation, have long been expected to exhibit optical activity (OA) with significantly high optical rotatory power in the solid state, compared with inorganic low-molecular-weight crystals. We examined the OA and light modulation (LM) properties of poly-L-lactic acid (PLLA) and poly-D-lactic acid (PDLA) films of which the higher order structure is achieved by a forging process. We confirmed that the PLLA and PDLA films possess levorotatory power and dextrorotatory power, respectively. The optical rotatory power ρ of the PLLA film is 7200°/mm which is approximately 300 times greater than that of α-quartz. This ρ value is an outstanding record. It may be impossible for us to identify every factor affecting the value of ρ because there are so many. Thus, we selected two conceivably important factors, a molecular weight M_w and isomer (D-type) content (ID). ρ decreases with increasing ID. ρ also decreases with decreasing M_w. Thus, we found that ID and M_w are important factors affecting the value of ρ. The higher order structure of PLLA films is greatly influenced by ID and M_w. Namely, the unprecedented large ρ of the PLLA sample is due to its higher order structure. Based on the above results, we conclude that this forging technology is useful for producing films with a controlled higher order structure. We then confirmed LM of the PLLA film up to 10 MHz. Since the PLLA film provides a fast response, we believe that a LM speed in the GHz range is possible using a more modified PLLA sample.
聚乳酸分子中含有不对称的碳原子,具有螺旋取向,与无机低分子量晶体相比,聚乳酸在固体状态下具有显著高的旋光率。研究了高阶聚L乳酸(PLLA)和聚D-乳酸(PDLA)薄膜的光学损耗和光调制(LM)性能。我们证实了PLLA和PDLA薄膜分别具有左旋力和右旋力。聚乳酸薄膜的旋光功率ρ为7200°/mm,约为α石英的300倍。这一ρ值是一个杰出的记录。我们可能不可能确定影响ρ价值的每一个因素,因为有太多因素。因此,我们选择了两个可以想象的重要因素,分子量M_w和异构体(D-型)含量(ID)。ρ随着ID的增加而减小,ρ也随着M_w的减小而减小,因此,ID和M_w是影响ρ的重要因素。聚乳酸薄膜的高阶结构受ID和Mw的影响很大,也就是说,PLLA样品的ρ比以往任何时候都要大,这是由于其高阶结构所致。基于以上结果,我们得出结论,该锻造工艺可用于制备具有可控高阶结构的薄膜。然后我们确认了PLLA薄膜的Lm高达10 MHz。由于PLLA薄膜提供了快速响应,我们相信使用更多改进的PLLA样品可以实现GHz范围内的LM速度。
项目成果
期刊论文数量(47)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Y.Tajitsu: "Temperature Dependence of High Ionic-conductivity of New Polymer Complex Films"J.Electrostatics. (印刷中).
Y. Tajitsu:“新型聚合物复合薄膜的高离子电导率的温度依赖性”J. Electrostatics(印刷中)。
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Y.Tajitsu: "Huge Optical Rotatory Power of Uuiaxially Orietited Film of Poly-L-Lactic Acid"J. Materials Sci. Lett.. 18. 1785-1787 (1999)
Y.Tajitsu:“聚-L-乳酸单轴取向膜的巨大旋光能力”J。
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Y.Tajitsu: "Optical Rotatory Power of Biodegradatic Polylactic Acid Films"Macromolecular Symposia. (印刷中).
Y. Tajitsu:“生物降解聚乳酸薄膜的光学旋转能力”高分子研讨会(正在出版)。
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Y.Tajitsu: "High Ionic-Conductivity of New Polymer Complex Films"Proceedings of the ESA-IEJ Joint Meeting. 381-389 (2002)
Y.Tajitsu:“新型聚合物复合薄膜的高离子电导率”ESA-IEJ 联席会议记录。
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- 影响因子:0
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田實佳郎(分担執筆): "生分解性プラスチックスにおける生分解性制御と材料設計および成型加工技術の最適化"(株)技術情報協会(印刷中). 250 (2003)
Yoshiro Taman(共同作者):“生物降解塑料的生物降解性控制、材料设计和成型技术的优化”技术信息协会有限公司(正在印刷)250(2003)。
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TAJITSU Yoshiro其他文献
TAJITSU Yoshiro的其他文献
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{{ truncateString('TAJITSU Yoshiro', 18)}}的其他基金
Fundamental Study of Application of Piezoelectric Chiral Polymer to Actuator
压电手性聚合物在执行器中应用的基础研究
- 批准号:
24655108 - 财政年份:2012
- 资助金额:
$ 2.18万 - 项目类别:
Grant-in-Aid for Challenging Exploratory Research
Piezoelectricity of Chiral Polymer and its Application
手性聚合物的压电特性及其应用
- 批准号:
18550112 - 财政年份:2006
- 资助金额:
$ 2.18万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
The Study on Physical and Optical Properties of Ferroelectric Polymers Applying Crystal Technology
应用晶体技术研究铁电聚合物物理和光学性能
- 批准号:
09450355 - 财政年份:1997
- 资助金额:
$ 2.18万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
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