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Increase of open‐cell content by plasticizing soft regions with secondary blowing agent
Author(s) -
Lee Patrick C.,
Naguib Hani E.,
Park Chul B.,
Wang Jin
Publication year - 2005
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.20422
Subject(s) - low density polyethylene , blowing agent , materials science , extrusion , polystyrene , polyethylene , butane , high density polyethylene , expansion ratio , composite material , expanded polystyrene , polymer chemistry , chemical engineering , polymer , organic chemistry , chemistry , polyurethane , catalysis , engineering
This article describes the effects of n‐butane mixed with primary CO 2 as a secondary blowing agent on the cell‐population density, the volume expansion ratio, and the open‐cell content of low‐density polyethylene (LDPE) and LDPE/polystyrene (PS) blends in extrusion. With the plasticizing effect of n‐butane, a high open‐cell content (up to 100%) over a wide range of processing temperatures was successfully achieved. POLYM. ENG. SCI., 45:1445–1451, 2005. © 2005 Society of Plastics Engineers