Break-Through in Breathable Polymers: Morphology, Properties, and Performance

摘要

Ethylene ionomers, such as Surlyn~R from DuPont~TM, have been the material of choice as packaging sealants because of their good mechanical properties and formability combined with excellent seal strength over a wide sealing temperature range, seal integrity in the presence of contamination, and hot tack. The ethylene ionomers achieve their unique property characteristics through the development of network morphology. In this paper we discuss the development of ionomers with novel performance (increased selective gas transmission while maintaining mechanical properties), we present evidence of the effect of composition on morphology, and propose a model that accounts for the outstanding gas permeability performance of these ionomers.