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在纳米层组件中聚乙烯氧化物的受限结晶

Haopeng Wang1, Jong K Keum, Anne Hiltner

  • 1Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH 44106-7202, USA.

Science (New York, N.Y.)
|February 7, 2009
PubMed
概括

研究人员使用一种新的联合挤出方法创建了超薄的聚合物层. 将聚乙烯氧化物 (PEO) 限制在20纳米范围内,产生了独特的晶体结构,显著降低了气体透性.

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Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...