Methods of Expanding Polystyrene to Ultra Low-density Foam

Ultra low-density expanded polystyrene is obtained by an optimum formulation or by extended exposure to atmospheric steam. A polystyrene resin is rheologically modified to have both ease of flow and resistance against collapse. The collapse resistance is imparted either by light crosslinking of the...

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Bibliographic Details
Published in:Journal of cellular plastics 2005-07, Vol.41 (4), p.389-399
Main Author: Park, Chung P.
Format: Article
Language:English
Subjects:
Applied sciences
Cellular
Exact sciences and technology
Forms of application and semi-finished materials
Polymer industry, paints, wood
Technology of polymers
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Summary:Ultra low-density expanded polystyrene is obtained by an optimum formulation or by extended exposure to atmospheric steam. A polystyrene resin is rheologically modified to have both ease of flow and resistance against collapse. The collapse resistance is imparted either by light crosslinking of the resin with a silane compound or by adding a small amount of polyphenylene ether. Extended exposure to steam permits continuous extension of cell walls by reducing orientation. An expanded polystyrene loose fill material having an expansion ratio exceeding 200 has been achieved.
ISSN:0021-955X
1530-7999
DOI:10.1177/0021955X05055118