Light-Induced Self Organization Phenomena in Polymer Alloys and Its Application to Design Novel Polymer Materials.

聚合物合金中的光致自组织现象及其在设计新型聚合物材料中的应用。

• 批准号: 02805112
• 负责人: TRANーCONG Qui
• 金额: $ 1.47万
• 依托单位: Kyoto Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02805112/
• 关键词: Polymer Alloy; Polystyrene; Poly (vinyl methyl ether); Polybutadiene; Photo-Cross-Link; Photodimerization; Reaction-Diffusion; Rayleigh-Benard Instability; アントラセン; 二量化反応; ポリマ-アロイ; 光架橋; 熱力学的不安定性; 反応ー拡散機構; 自己組織化

The Purposes of this work are :1) Investigation of the self organization process in binary Polymer blends irradiated with UV light.2) Elucidation of the possibility for taking advantage of this mechanism to design novel polyner materials with the ordered structures in micrometer range.At first, Polystyrene/poly(2-chlorostyrene)(PS/P2CS)and polystyrene/poly(vinyl methyl ether)(PS/PVME)blends were irradiated during the time evolution of the spinodal decomposition Process. The photo-cross-link reactions between PS chains are induced via the photodimerization of anthracene moieties which are covalently attached to PS chains. The effects of irradiation intensity, irradiation time, annealing temperature and T-jump depths on the resulting morphology were examined by using phase-contrast optical microscope, light scattering and small-angle X-ray scattering.The following results were obtained :- The concentration fluctuations developing during the spinodal decomposition process were efficiently … More frozen upon irradiation with either XeF excimer laser or ffg lamp. These results indicate that by taking advantage of photo-cross-link reactions, multiphase polymer materials with various ordered structures in the mum range can be designed.- Further analysis of the ordered structures resulting from irradiation shows that the reaction between PS does not only freeze the concentration fluctuations but also modify these structures. 'For PS/P2CS submitted to a shallow T-jump, the light scattering profile exhibits multiple scattering peaks, revealing the unusual effects of irradiation.- To separate the contribution of the spinodal structures to the effects of. photo-cross-link, irradiation experiments were performed in the one-phase region of Polystyrene/polybutadiene(PS/PB). It was found that photo-cross-link reactions between PB chains result in the large modulated structures with internal domains- A reaction-diffusion model taking into account of the nonlinear reactions between polymer chains in a binary polymer mixture was proposed in ordered to explain these morphology. Alternatively, there is another possibility for the origin of the ordered structures revealed by irradiation with laser, That is the convection caused by the extra heat originated from the radiationless process of'excited anthracenes. Actually, the morphology obtained by irradiating PSA/P2CS blends with XeF excimer laser shows the typical dissipative structures of the Rayleigh-Benard type.The competition between reaction-diffusion Turing instability and Rayleigh-Benard instability for polymer alloys irradiated with light is currently investigated by computer simulation. Less

这项工作的目的是：1）研究紫外光照射下二元聚合物共混物的自组织过程。2）阐明利用这种机制设计具有微米范围有序结构的新型聚合物材料的可能性。首先，聚苯乙烯/聚（2-氯苯乙烯）（PS/P2CS）和聚苯乙烯/聚（乙烯基甲基） 乙醚）（PS/PVME）共混物在旋节线分解过程的时间演化过程中受到辐照。 PS 链之间的光交联反应是通过共价连接到 PS 链的蒽部分的光二聚作用诱导的。通过使用相差光学显微镜、光散射和小角 X 射线散射，检查了辐照强度、辐照时间、退火温度和 T 跃迁深度对所得形貌的影响。获得了以下结果：- 在使用 XeF 准分子激光或 ffg 灯辐照时，旋节线分解过程中产生的浓度波动被有效地冻结。这些结果表明，通过利用光交联反应，可以设计出在微米范围内具有各种有序结构的多相聚合物材料。-对辐照产生的有序结构的进一步分析表明，PS之间的反应不仅冻结了浓度波动，而且还改变了这些结构。 “对于进行浅 T 跃迁的 PS/P2CS，光散射曲线表现出多个散射峰，揭示了辐照的不寻常效应。- 分离旋节线结构对效应的贡献。”在聚苯乙烯/聚丁二烯（PS/PB）的单相区域进行光交联、辐照实验。研究发现，PB 链之间的光交联反应会产生具有内部域的大型调制结构。为了解释这些形态，提出了考虑二元聚合物混合物中聚合物链之间的非线性反应的反应扩散模型。另外，激光照射所揭示的有序结构的起源还有另一种可能性，即由激发蒽的无辐射过程产生的额外热量引起的对流。实际上，用XeF准分子激光照射PSA/P2CS共混物获得的形貌显示出典型的Rayleigh-Benard型耗散结构。目前通过计算机模拟研究光照射下聚合物合金的反应扩散图灵不稳定性和Rayleigh-Benard不稳定性之间的竞争。较少的

项目成果

Q.TRAN-CONG et al.: "Controlling Morphology of Polystyrene/Poly(vinyl methyl ether)Blends Undergoing Spinodal Decomposition Process by Photo-Crosslink" Polym.Sci.Eng.

Q.TRAN-CONG 等人：“通过光交联控制旋节线分解过程中聚苯乙烯/聚（乙烯基甲基醚）混合物的形态”Polym.Sci.Eng。

Q.TRANーCONG et al.: "Structure of Polymer Blends PhotoーCrosslinked During the Spinodal Decomposition Process" Macromolecules. 24. 1505-1510 (1991)

Q.TRAN-CONG 等人：“调节分解过程中聚合物共混物光交联的结构”大分子 24. 1505-1510 (1991)

QUI TRANーCONG et al.: "“Stucture of Polymer Blends PhotoーCrossーLinked During the Spinodal Decomposition Process"" MACROMOLECULES. 24. (1991)

QUI TRAN-CONG 等人：“调节分解过程中聚合物共混物光交联的结构”” MACROMOLECULES. 24. (1991)

Q. Tran-Cong et al.: "Sturucture/Property Relationship in binary Polymer Blends Photo-Crosslinked During the Spinodal Decomposition Process" Polym. Mat. Sci. Eng.62. 706-711 (1990)

Q. Tran-Cong 等人：“旋节线分解过程中光交联的二元聚合物共混物中的结构/性能关系”

Q. TRAN-CONG: "Controlling Morphology of Polymer Blends by Photo-Crosslink (in Japanese)" 12(5). (1992)

Q. TRAN-CONG：“通过光交联控制聚合物共混物的形态（日语）”12(5)。