近日，维也纳技术大学的研究人员使用新的聚合物合成方式，第一次合成出角形的抗阻聚酰亚胺材料。（High-performance material polyimide for the first time with angular shape）
聚酰亚胺材料能够承受极端的高温并且具有优异的耐化学腐蚀性，其密度还远远小于金属。也正是因为聚酰亚胺的高稳定性，使得合成它们非常困难。这项研究开辟了化学合成的全新领域，在这里不同聚合物之间可以按照人们所认为的不寻常方式进行结合。
众所周知，在凝胶结晶、高性能材料、固态合成和晶体学领域，聚合物之间很少结合。因此，研究人员突破这些障碍，让聚合物按照人们所希望的方式结合是非常值得肯定的。
以上内容来源：材料人网，仅供参考学习。
参考文献：
Shape-Anisotropic Polyimide Particles by Solid-State Polycondensation of Monomer Salt Single Crystals
Macromolecules
DOI: 10.1021/acs.macromol.5b01545
December 8, 2015
Shape-anisotropic particles are of broad interest, e.g., for colloidal crystals or applications at interfaces such as particle-stabilized emulsions. Despite the wealth of accessible shapes of inorganic particles, anisotropic homopolymer particles are to date mostly limited to objects derived from spheres (e.g., ellipsoidal or disk-shaped particles). Here, we report the synthesis of shape-anisotropic, angular polyimide particles by thermal solid-state polycondensation (SSP) of monomer salts. We prepare monomer salt single crystals of relatively narrow size and shape distribution by growth inside hydrogels, and solve their crystal structure. Polyimide particles are obtained by simple heating and retain the shape of the initial salt crystals. Using high-temperature X-ray diffraction, thermal analyses and microscopy techniques, we investigate the mechanism of the transformation. The obtained polyimide particles are temperature-stable up to 640 °C and virtually insoluble in any solvent. This work sheds more light on the mechanism of SSP of monomer salts and reports a new methodology for accessing nonspherical homopolymer particles, which are due to their outstanding stability potentially of interest for applications under extreme conditions.