Research in Undergraduate Institutions: Solid State Coextrusion of Polymers of Complex and Simple Morphologies

固态共挤出（SSCE）的单轴拉伸已被证明， 赋予聚合物不寻常的特性。 其中包括增加融化 点，双折射率和拉伸模量，和负系数 热膨胀等等。 在一个最显着的 在实施例中， 超过200的拉伸比，产生接近100的拉伸模量。 理论最大值。 这项研究的目的是扩大 一个过程的基本知识，可以令人印象深刻地改变 聚合物的形态和结构，以提供不寻常的性能， 最初具有不寻常形态和性质的材料。 固态共挤出将尝试对新生聚乙烯。 的 通过共挤出工艺拉伸聚合物单晶垫将 进行。

Uniaxial drawing by solid state coextrusion (SSCE) has been shown to impart unusual properties to polymers. These include increased melting point, birefringence and tensile modulus, and negative coefficients of thermal expansion, among others. In one of the most remarkable examples, mats of single crystals of high density polyethylene were drawn to draw ratios of over 200, producing a tensile modulus close to the theoretical maximum. The goal of this research is to extend the fundamental knowledge of a process which can impressively alter the morphology and structure of a polymer to give unusual properties and materials which initially have unusual morphology and properties. Solid state coextrusion will be attempted on nascent polyethylene. The drawing of polymer single crystal mats by the coextrusion process will be undertaken.