TY  - BOOK
AU  - Zhai,W.
AU  - Kuboki,T.
AU  - Wang,L.
AU  - Park,C.B.
AU  - Lee,E.K.
AU  - Naguib,H.E.
TI  - Cell Structure Evolution and the Crystallization Behavior of Polypropylene/Clay Nanocomposites Foams Blown in Continuous Extrusion
N2  - In this study, linear homopolypropylene/clay (HPPC)nanocomposite foams with a high expansion ratio of about 18 and a high cell density of about 1.7 _~ 108 cells/cm3 were produced using an extrusion foaming method with CO2 as the physical blowing agent. The result was much better than pure HPP foams with expansion ratios of 1.7-2.2 and cell densities of 103-105 cells/cm3 obtained even at the same foaming conditions. The nanoclays had a half-exfoliated structure in the HPP matrix, and their presence dramatically affected the viscoelastic properties of HPP melt and foaming behaviors. It was found that the introduction of a small amount of nanoclay significantly increased the cell morphology of HPP foams at low die temperatures, where the cell wall was very thin and cell distribution was uniform. With an increase in nanoclay content of up to 5 wt
UR  - https://drive.google.com/file/d/1Z4zEIFtrcQ2CoI28BwhSI7Fl8wsxZbAq/view?usp=drivesdk
ER  -