Porous structure of crystalline polymers by exclusion effect of carbon dioxide
作者： Yoshiaki Koga , Hiromu Saito
DOI: 10.1016/J.POLYMER.2006.08.052
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摘要: Abstract We investigated the morphology of high-density polyethylene (HDPE) and poly(vinylidene fluoride) (PVDF) crystallized under carbon dioxide (CO 2 ) by light scattering measurements microscopic observations. The crystallization HDPE was delayed ordering spherulite smaller dissolving CO rather than air at ambient pressure. A fine-layered porous structure having a size 500 nm obtained in HDPE, while large rod-like radiating PVDF. Such characteristic is attributed to exclusion from crystal growth front intercrystalline amorphous region bubbles supersaturation constrained region. effect covered Keith–Padden theory through consideration self-diffusion polymer–CO systems; occur as lamellar stacks whereas they bundles
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