SYNTHESIS AND CHARACTERIZATION OF NOVEL THERMOPLASTIC ELASTOMERS BY CATIONIC LIVING POLYMERIZATION

阳离子活性聚合新型热塑性弹性体的合成与表征

• 批准号: 04453115
• 负责人: KOHJIYA Shinzo
• 金额: $ 4.54万
• 依托单位: KYOTO UNIVERSITY (1993-1994)Kyoto Institute of Technology (1992)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04453115/
• 关键词: Thermoplastic Elastomer; Poly (tetrahydrofuran); Poly (ethylene oxide); Ionene; Ion Cluster; Butyl Rubber; Small-angle X-ray Scattering; Segmented Polyurethane; エチレンオキシド

For a development of novel thermoplastic elastomers (TPE) , a design was proposed : Formation of microdomains by an result in the TPEs of special grade. This design was realized by the syntheses using living cationic polymerizations of cyclic monomers such as ethylene oxide and tetrahydrofuran, grafting of hydrophylic segments onto hydrophobic rubber molecule, and polymer blending.Living dicationic species from tetrahydrofuran were reacted with bipyridine to result in the formation of ionene type ionic elastomers which showed very good elastomeric properties. DSC,dynamic mechanical analysis (DMA) measurements suggested ion cluster formation in the polyether matrix. Small-angle X-ray scattering (SAXS) technique revealed very unique lamellae structure of this ionene-type TPE.Grafting of poly (ethylene oxide)(PEO) or sugar unit on halogenated butyl rubber also resulted in TPE.Microdomain formations of hydrophilic PEO or sugar units were suggested by DSC,DMA,and SAXS.These butyl rubber-g-hydrophilic segments were elastomeric without any crosslinkings, i.e., they are TPE.TPE by more simple mechanical blending was also studied.Influence of processing conditions on the properties of TPE is assumed to be significant. In the film forming by solution casting technique, evaporation rate of the solvent may be very important. Effect of the solvent evaporation rate were studied on polyurethanes : The morphology of polyurethane films was analyzed by infrared dichroism measurement under streching of the films. In relation with this study, properties of polyurethanes as soft tissues of human body were evaluated to obtain biocompatible soft materials.

为了开发新型热塑性弹性体，提出了一种设计方案：通过在特种热塑性弹性体中形成微区。该设计是通过环氧乙烷和四氢呋喃等环状单体的活性阳离子聚合、疏水橡胶分子上接枝丙烯酸链段以及聚合物共混等方法实现的，由四氢呋喃衍生的活性双阳离子物种与联吡啶反应，形成了具有良好弹性性能的紫罗烯型离子弹性体。DSC，动态力学分析（DMA）的测量表明，在聚醚基体中形成离子簇。小角X射线散射（SAXS）分析表明，聚乙烯（PEO）或糖单元接枝到卤化丁基橡胶上，形成了亲水性PEO或糖单元的微区，这些丁基橡胶-g-亲水性链段是弹性体，没有任何交联，也就是说，它们的分子量分布在聚乙烯（PEO）和糖单元之间，而聚乙烯（PEO）和糖单元的分子量分布在聚乙烯（PEO）和糖单元之间。本文还研究了较简单的机械共混法制备的TPE，认为加工条件对TPE性能的影响是显著的。在通过溶液流延技术的膜形成中，溶剂的蒸发速率可能非常重要。研究了溶剂挥发速率对聚氨酯薄膜的影响：通过红外二向色性测试，分析了薄膜在拉伸条件下的形貌。结合本研究，评价了聚氨酯作为人体软组织的性能，以获得生物相容性软材料。

项目成果

S.Kohjiya et al.: "Natural Rubber-HDPE Blends with Liquid Natural Rubber as Copatibilizer.I.Thermal and Mechanical Properties" J.Appl.Polym.Sci.51. 1357-1363 (1994)

S.Kohjiya 等人：“天然橡胶-HDPE 混合物与液体天然橡胶作为 Copatibilizer.I. 热性能和机械性能”J.Appl.Polym.Sci.51。

Y.Ikeda, S.Kohjiya et al.: "Chemical modification of butyl rubber I.Synthesis and properties of poly (ethylene oxide) -grafted butyl rubber" J.Polym.Sci., Part A,Polym.Chem.20GD03 : Vol.31. 2437-2444 (1993)

Y.Ikeda、S.Kohjiya 等人：“丁基橡胶的化学改性 I. 聚环氧乙烷接枝丁基橡胶的合成和性能” J.Polym.Sci.，A 部分，Polym.Chem.20GD03 : Vol

池田裕子: "Synthesis of dextran derivatives by ring-opening polymerization 1.Synthetic dextran having partially primary hydroxyl groups" Makromolekulare Chemie:Rapid Communication. 14. 551-555 (1993)

Yuko Ikeda：“通过开环聚合合成葡聚糖衍生物1.具有部分伯羟基的合成葡聚糖”Makromolekulare Chemie：Rapid Communication 14. 551-555 (1993)。

Y.Ikeda, S.Kohiya et al.: "Chemical modification of butyl rubber III.Butyl rubber with D-maltose derivative as pendant groups" J.Polym.Sci., Part A,Polym.Chem.(submitted).

Y.Ikeda、S.Kohiya 等人：“丁基橡胶的化学改性 III.丁基橡胶以 D-麦芽糖衍生物作为侧基”J.Polym.Sci.，A 部分，Polym.Chem.（已提交）。

S.Kohjiya et al.: "Natural rubber-HDPE blends with liquid natural rubber as a compatibilizer" J.Appl.Polym.Sci.Vol.51. 1357-1363 (1994)

S.Kohjiya 等人：“天然橡胶-HDPE 与液体天然橡胶共混物作为相容剂”J.Appl.Polym.Sci.Vol.51。