A Study on the Size Control of EVOH Dispersed Phase in PP/EVOH Blend System According to CMC Addition
발표자
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초록
내용
Polypropylene (PP)/ethylene vinyl alcohol copolymer (EVOH) blends are widely known as immiscible blend systems. In this study, CMC (cellulose microcrystal), which has high affinity with EVOH, was added to the PP/EVOH blend to prove that it is effective in reducing the EVOH dispersed phase in the PP matrix. It was confirmed through mechanical, thermal, and rheological analysis that the PP/EVOH blend gradually changed to a property similar to PP as the content of CMC increased. In addition, it was observed using morphology analysis that the size of the EVOH dispersed phase decreases with increasing CMC content in the PP/EVOH blend. When the PP/EVOH blend with the reduced size of the EVOH dispersed phase is biaxially stretched, the EVOH will be located in a more complex form in the PP matrix, and it is predicted that the oxygen barrier property will be further improved due to these morpholgical properties.