1. A foam, consisting of a composite material and a plurality of foam cells, and a plurality of foam cells is disposed in the composite material, wherein the composite material comprises a modified sulfur-containing polymer, and a fluorine-containing polymer fiber, wherein a degree of orientation as defined by the ratio I110/I200 is from 1.0 to 1.3, wherein I110 is an X-ray diffraction peak intensity of (110) planes of the modified sulfur-containing polymer and I200 is an X-ray diffraction peak intensity of (200) planes of the modified sulfur-containing polymer.
|