| 摘要 |
<p>A method of preparing a relatively homogeneous, isotropic, three-dimensional microporous polymer structure comprising heating a mixture of a synthetic thermoplastic polymer selected from the group consisting of olefinic polymers, condensation polymers, oxidation polymers, and blends thereof, and a compatible liquid to a temperature and for a time sufficient to form a homogeneous solution. me solution is allowed to assume a desired shape, it is cooled in the desired shape at a rate and to a temperature sufficient to initiate thermodynamic, non-equilibrium liquid-liquid phase separation, cooling is continued to form a solid and at least a substantial portion of the liquid is removed from the resulting solid to form the microporous polymer structure.</p> |
