Patent ID: 9376516
Filing Date: 2016-06-28
CPC Classification: C08F,C09D

Claim Text:
1. A method comprising: cooling a substrate to a temperature at or below a freezing point of a monomer, wherein the monomer is capable of free-radical polymerization; exposing the substrate to an initiator and the monomer, each in a vapor phase, wherein a concentration of the monomer in the vapor phase is above a saturation pressure of the monomer; converting the initiator to a free radical; crystalizing and depositing the monomer on the substrate; and polymerizing at least some of the monomer on the substrate, thereby forming a porous polymer structure on the substrate; wherein the porous polymer structure comprises microstructures that comprise a polymer, wherein the polymer is a polymerization product of reactants that comprise the free radical and the monomer, and wherein the porous polymer structure has two types of pores: (1) intracrystalline pores within microstructures and (2) intercrystalline pores between the microstructures.