Flow-induced Structure of Strongly Correlated Polymer Blends

强相关聚合物共混物的流动诱导结构

• 批准号: 13031041
• 负责人: TAKAHASHI Yoshiaki
• 金额: $ 21.31万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13031041/
• 关键词: Multi-component systems; Flow-induced structure; Domain size; Break up process; Coalescence process; Size distribution; 合一の加速; ブロック共重合体; 流動誘起配向化; 中性子小角散乱; 粘弾性コントラスト; 二様分布; 合一; 分裂; 非相溶高分子混合系; 凝集過程; 構造観察; 二元ブロック共重合体; 配向; 分散構造の安定化

Effects of component's viscosities of diblocks on the flow induced alignment of microdomains are examined. It was observed that block copolymer with components having almost the same viscosities are much difficult to be aligned by the flow.Flow-induced structure of immiscible polyolefin blends are examined by flow-SANS measurements. It was observed that string-like phase can exist even at the steady states at low shear rates while those strings burst into small droplets at high shear rates. These observations can be explained by extremely small interfacial tension between chemically similar components.Break up and coalescence process of domain structure in a immiscible polymer blends with the viscosity ratio close to one are examined. In the coalescence process, there exists shear rate region in which domain structure and resulting viscoelastic properties are well controlled by the flow, but the behavior cannot be explained by Doi-Ohta theory. In such shear rate region, reproducibility of the data for break-up process become poor and inconsistent with those for coalescence process.

考察了二嵌段组分粘度对流动诱导微区取向的影响。结果表明，粘度相近的嵌段共聚物很难在流动作用下发生取向。用流动SANS方法研究了不相容聚烯烃共混物的流动诱导结构。结果表明，在低剪切速率下，即使在稳定状态下也可以存在绳状相，而在高剪切速率下，这些绳状相破裂成小液滴。这些现象可以用化学相似组分间极小的界面张力来解释。研究了粘度比接近1的不相容聚合物共混物中畴结构的破碎和合并过程。在聚结过程中，存在剪切速率区，在剪切速率区，畴结构和粘弹性能受流体的控制，但这种行为不能用Doi-Ohta理论解释。在这样的剪切速率区域中，破碎过程的数据的再现性变差，并且与聚结过程的数据不一致。

项目成果

Y.Takahashi, A.Yoshida, A.Takano, Y.Matsushita: "Stabilization of Dispersed Domains in Polymer Blends by Addition of Low Molecular Weight Diblock Copolymer"Materials Science Research International. 7. 229-233 (2001)

Y.Takahashi、A.Yoshida、A.Takano、Y.Matsushita：“通过添加低分子量二嵌段共聚物稳定聚合物共混物中的分散域”国际材料科学研究。

高橋良彰, 柳田正毅, 野田一郎: "ポリαメチルスチレン溶液の流動誘起相分離とその粘弾性"日本レオロジー学会誌. 30. 41-44 (2002)

Yoshiaki Takahashi、Masatake Yanagita、Ichiro Noda：“聚α-甲基苯乙烯溶液的流动诱导相分离及其粘弹性”日本流变学会杂志 30. 41-44 (2002)。

Y.Takahashi: "Stabilization of Dispersed Domains in Polymer Blends by Addition of Low Molecular Weight Diblock Copolymer"Materials Science Research International. 7巻・4号. 229-233 (2001)

Y. Takahashi：“通过添加低分子量二嵌段共聚物稳定聚合物共混物中的分散域”《材料科学研究国际》第 7 卷，第 4 期。229-233 (2001)

H.Tan, H.Watanabe, Y.Matsumiya, T.Kanaya, Y.Takahashi: "Shear-Induced Disruption and Recovery of Microphase-Separated Network Structure of a BSB Triblock Copolymer in Dibutyl Phthalate"Macromolecules. 36. 2886-2893 (2003)

H.Tan、H.Watanabe、Y.Matsumiya、T.Kanaya、Y.Takahashi：“邻苯二甲酸二丁酯中 BSB 三嵌段共聚物微相分离网络结构的剪切诱导破坏和恢复”大分子。

Y.Takahashi, M.Yanagida, I.Noda: "Flow-Induced Phase Separation and Related Viscoelastic Properties of Poly (α-Methylstyrenes) Solutions"Nihon Reoroji Gakkaishi. 30. 41-44 (2002)

Y.Takahashi、M.Yanagida、I.Noda：“聚（α-甲基苯乙烯）溶液的流动诱导相分离和相关粘弹性特性”Nihon Reoroji Gakkaishi，30. 41-44 (2002)。