Self-Assembly of Highly Immiscible Polymers Using Balanced Surfactants
使用平衡表面活性剂自组装高度不混溶聚合物
基本信息
- 批准号:0201211
- 负责人:
- 金额:$ 5万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2002
- 资助国家:美国
- 起止时间:2002-04-01 至 2003-03-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
SELF-ASSEMBLY OF HIGHLY IMMISCIBLE POLYMERS USING BALANCED SURFACTANTSThe PI's objective is to create a library of surfactants for controlling the nano-scale self-assembly in mixtures of highly immiscible polymers. This will enable the creation of new nano-structuredpolymer materials. It may also enable reusing commingled polymeric waste. The proposed approach represents a risky departure from the large body of previous experimental and theoretical work in this field which relied of the surfactancy of A-B copolymers for organizing mixtures of A and B homopolymers. It is now recognized that these types of copolymers can only organize interfaces if the homopolymers are weakly immiscible. The surfactant that will be uses in the study is a balanced A-C block copolymer. The notion of balance is adapted from the rich literature on surfactancy in aqueous systems. Nonionic surfactants with balanced hydrophobic and hydrophilic character have been successful in creating nano-scale organization in oil/water mixtures in spite of their high degree of incompatibility. The goal is to apply this principle to polymers. The proposed experiments will be conducted on mixtures of highly immiscible polyolefins, polybutene (PB) and polyisobutylene (PIB). The PI will use a polybutene-block-head-to-head polypropylene (PB-PP) copolymer as a surfactant. The objective is to demonstrate that PB/PIB/PB-PP blends exhibit the rich self-assembly characteristics found in aqueous systems. The PI chose this system because the magnitude and sign of the temperature dependence of the PB/PP and PIB/PP Flory-Huggins interaction parameters are (approximately) equal and opposite, respectively. Model polymers required for this study will be synthesized by anionic and cationic polymerization. Self-assembly will be studied by small angle neutron scattering, light scattering, and electron microscopy.IMPACT STATEMENTThis proposed research on balanced surfactants holds the potential of introducing radically new technology for controlling the morphology of polymer blends. It will enable the creation of new blended materials from industrially important polymers such as polyisobutylene (a polymer of considerable current importance because of its use in the manufacture protective garments for working in chemically and biologically contaminated areas). Industrial production of nanostructured blends of electrically conducting and non-conducting polymers may also be enabled by the proposed research. The approach of using balanced surfactants is inspired by the efficacy of synthetic and natural surfactants in aqueous systems. However, the scientific challenge of applying principles learned in aqueous systems to hydrocarbon polymers is considerable because of the difference in fundamental intermolecular interactions. Interactions with water molecules are dominated by their permanent dipole and specific interactions such as hydrogen bonding. The SGER proposal seeks to explore the possibility of designing balanced surfactants in the absence of these interactions.
PI的目标是创建一个表面活性剂库,用于控制高度不混溶聚合物混合物中的纳米尺度自组装。这将使新的纳米结构聚合物材料的创造成为可能。它还可以使得能够再利用混合的聚合物废物。所提出的方法代表了一个危险的偏离,从以前的实验和理论工作,在这一领域依赖于表面活性的A-B共聚物的组织混合物的A和B均聚物。现在认识到,这些类型的共聚物只能组织界面,如果均聚物是弱不混溶的。将用于研究的表面活性剂是平衡的A-C嵌段共聚物。平衡的概念是从丰富的文献中改编的表面活性剂在水系统。具有平衡的疏水和亲水特性的非离子表面活性剂已经成功地在油/水混合物中产生纳米尺度组织,尽管它们的高度不相容性。我们的目标是将这一原理应用于聚合物。建议的实验将进行高度不混溶的聚烯烃,聚丁烯(PB)和聚异丁烯(PIB)的混合物。 PI将使用聚丁烯嵌段头对头聚丙烯(PB-PP)共聚物作为表面活性剂。 目的是证明PB/PIB/PB-PP共混物表现出在水体系中发现的丰富的自组装特性。PI选择这个系统是因为PB/PP和PIB/PP Flory-Huggins相互作用参数的温度依赖性的大小和符号分别(近似)相等和相反。本研究所需的模型聚合物将通过阴离子和阳离子聚合来合成。自组装将通过小角中子散射,光散射和电子显微镜进行研究。IMPACT STATEMENTThis提出的平衡表面活性剂的研究具有引入全新技术的潜力,用于控制聚合物共混物的形态。 它将能够从工业上重要的聚合物,如聚异丁烯(一种目前相当重要的聚合物,因为它用于制造在化学和生物污染地区工作的防护服)中产生新的混合材料。 导电和非导电聚合物的纳米结构混合物的工业生产也可能通过拟议的研究实现。 使用平衡表面活性剂的方法受到合成和天然表面活性剂在水性体系中的功效的启发。 然而,由于基本分子间相互作用的差异,将在含水体系中学到的原理应用于烃聚合物的科学挑战是相当大的。 与水分子的相互作用主要是由它们的永久偶极和特定的相互作用,如氢键。 SGER提案旨在探索在没有这些相互作用的情况下设计平衡表面活性剂的可能性。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Nitash Balsara其他文献
Nitash Balsara的其他文献
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{{ truncateString('Nitash Balsara', 18)}}的其他基金
Collaborative Research: Thermodynamics and Ion Transport in Hybrid Organic-Inorganic Block Copolymer Electrolytes
合作研究:杂化有机-无机嵌段共聚物电解质的热力学和离子传输
- 批准号:
1904508 - 财政年份:2019
- 资助金额:
$ 5万 - 项目类别:
Standard Grant
Collaborative Research: Thermodynamics, Grain Structure, and Ion Transport in Block Copolymer/Salt Mixtures
合作研究:嵌段共聚物/盐混合物中的热力学、晶粒结构和离子传输
- 批准号:
1505444 - 财政年份:2015
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$ 5万 - 项目类别:
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Collaborative Research: SusChEM: Perfluoroether-based Polymer Electrolytes for Lithium Batteries
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1333736 - 财政年份:2013
- 资助金额:
$ 5万 - 项目类别:
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合作研究:嵌段共聚物中的电子和离子传输
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Collaborative Research: Thermodynamics and Ion Transport in Block Copolymer/Lithium Salt Mixtures
合作研究:嵌段共聚物/锂盐混合物中的热力学和离子传输
- 批准号:
0966626 - 财政年份:2010
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$ 5万 - 项目类别:
Continuing Grant
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嵌段共聚物自组装的电化学控制
- 批准号:
0625785 - 财政年份:2006
- 资助金额:
$ 5万 - 项目类别:
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GOALI: Balanced Surfactants for Self-Assembly of Highly Immiscible Polymers
目标:用于高度不混溶聚合物自组装的平衡表面活性剂
- 批准号:
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$ 5万 - 项目类别:
Continuing Grant
Symposium on Self Assembled Photonic Band Gap Materials; ACS Spring Meeting; Orlando, FL; April 7-12, 2002
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Rational Design of Internal Interfaces in Multicomponent Polymer Blends
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0196066 - 财政年份:2000
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$ 5万 - 项目类别:
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