In:
Journal of Cellular Plastics, SAGE Publications, Vol. 50, No. 4 ( 2014-07), p. 381-393
Abstract:
Bi-modal PS foams with various volume fractions of large cells ( f L ), cell sizes and densities were prepared to investigate the effect of cell structures on the tensile and impact behaviors. The tensile results showed that for the similar density, the tensile strength and modulus decreased with the increase of f L , unless the cell size of large ones is smaller than 25 µm. Similarly, the impact experimental results showed that the impact strength decreased with increasing f L , unless the f L is in the range of 25–32%. It indicated that the bi-modal cell structure could lead to the better properties than that of uniform one, when the cell morphology was proper ( f L in the range of 25–32% and the cell size of large ones smaller than 25 µm). The SEM images of impact-fractured surface of bi-modal foams further confirmed that the cell morphology with f L of 32% was more favorable to the absorption of impact energy during the fracture process.
Type of Medium:
Online Resource
ISSN:
0021-955X
,
1530-7999
DOI:
10.1177/0021955X14525960
Language:
English
Publisher:
SAGE Publications
Publication Date:
2014
detail.hit.zdb_id:
2098525-3
SSG:
2
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