Livshin Shulamit, Silverstein Michael S
Department of Materials Engineering, Technion - Israel Institute of Technology, Haifa 32000, Israel.
Soft Matter. 2008 Jul 16;4(8):1630-1638. doi: 10.1039/b802173b.
A polyHIPE is a cross-linked, highly porous polymer from the polymerization of monomers and cross-linking comonomers in the external phase of a high internal phase emulsion (HIPE). Crystallizable polyHIPE were synthesized through the copolymerization of stearyl acrylate (A18) with ethylene glycol dimethacrylate (EGDMA). PolyHIPE synthesized with the more flexible EGDMA were compared to those synthesized with the more rigid divinylbenzene. The polyHIPE densities were around 0.11 g cm-3. EGDMA destabilized the HIPE yielding relatively large voids and a structure whose partial closed-cell nature increased with increasing EGDMA content. The EGDMA cross-linked polyHIPE exhibited higher melting peak temperatures and higher crystallinities than the divinylbenzene cross-linked polyHIPE. Organic phase initiation of the EGDMA cross-linked polyHIPE yielded lower melting temperatures, lower crystallinities, and a highly interconnected porous structure that resulted in a lower modulus.
聚高内相乳液互穿聚合物网络（polyHIPE）是一种通过在高内相乳液（HIPE）外相中使单体与交联共聚单体聚合而形成的交联、高孔隙率聚合物。可结晶的聚高内相乳液互穿聚合物网络是通过丙烯酸十八酯（A18）与乙二醇二甲基丙烯酸酯（EGDMA）共聚合成的。将用更具柔性的EGDMA合成的聚高内相乳液互穿聚合物网络与用刚性更强的二乙烯基苯合成的聚高内相乳液互穿聚合物网络进行了比较。聚高内相乳液互穿聚合物网络的密度约为0.11 g/cm³。EGDMA会使高内相乳液不稳定，产生相对较大的空隙以及一种其部分闭孔性质随EGDMA含量增加而增强的结构。与二乙烯基苯交联的聚高内相乳液互穿聚合物网络相比，EGDMA交联的聚高内相乳液互穿聚合物网络表现出更高的熔点峰值温度和更高的结晶度。EGDMA交联的聚高内相乳液互穿聚合物网络的有机相引发产生了更低的熔化温度、更低的结晶度以及高度互连的多孔结构，这导致了更低的模量。
