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.

研究了二嵌段的组分粘度对流动诱导的微区比对的影响。据观察，具有几乎相同粘度的组件的块共聚物很难被流动对齐。流量sans测量结果不混溶的聚烯烃混合物的流量诱导的结构。据观察，即使在稳态下以低剪切速率也可以存在类似弦的相，而这些字符串以高剪切速率爆裂成小滴。这些观察结果可以通过化学相似的组件之间的极小界面张力来解释。在不混溶的聚合物混合物中裂解和结合结构的合并过程，并检查了接近一个的粘度比。在合并过程中，存在剪切速率区域，其中域结构和由此产生的粘弹性特性受流量很好地控制，但行为不能用doi-ohta理论来解释。在这样的剪切速率区域中，分手过程数据的可重复性与合并过程的数据变得差，并且不一致。

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。

Y.Takahashi et al.: "Domain Structures and Rheological Properties of Immiscible Polymer Blends under Shear Flow in Parallel Plates"Materials Science Research Inernational. 9. 278-281 (2003)

Y.Takahashi 等人：“平行板剪切流下不混溶聚合物共混物的域结构和流变性能”材料科学研究国际。

Y.Takahashi et al.: "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 等人：“通过添加低分子量二嵌段共聚物来稳定聚合物共混物中的分散域”国际材料科学研究。

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)

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)。