Mechanics of Strain-Induced Crystallization in Amorphous Polymeric Materials

9622526博伊斯这个项目将研究非晶态聚合物在应变诱导结晶过程中的力学行为。这些聚合物开始时处于无定形状态，但在接近玻璃化转变温度的变形过程中，在一定的应力-应变状态下，将结晶。这种结晶作用进一步增加了它们的硬度和强度，而不是由于它们的分子取向。然而，结晶并不是在所有的应力-应变状态下都发生的，事实上有时会降低硬度或强度。虽然这显然是基础研究，但它也直接适用于实际的聚合物加工操作和产品。***

9622526 Boyce This project will study the mechanical behavior of amorphorous polymers which undergo strain-induced crystallization. These polymers begin in the amorphous state, but during deformation processing near the glass transition temperature and at certain stress-strain states, will crystallize. Such crystallization acts to further increase their stiffness and strength beyond that due to their molecular orientation. However the crystallization does not occur at all stress-strain states and in fact sometimes decreases in stiffness or strength. While this is clearly fundamental research, it is also directly applicable to real polymer processing operations and products. ***