A 3D π-conjugated polyradicaloid molecular cage c-Ph14, consisting of three Chichibabin's hydrocarbon motifs connected by two benzene-1,3,5-triyl bridgeheads, was synthesized. Compared with its linear model compound l-Ph4, the prism-like c-Ph14 has a more rigid structure, which shows significant im-pact on the moleculardynamics, stability, and electronic properties. A higher rotation energy barrier
Purification of halogenated aromatic sulfones or ketones
申请人:PHILLIPS PETROLEUM COMPANY
公开号:EP0431612B1
公开(公告)日:1994-09-28
US4990678A
申请人:——
公开号:US4990678A
公开(公告)日:1991-02-05
US5260489A
申请人:——
公开号:US5260489A
公开(公告)日:1993-11-09
Synthesis and properties of novel poly(aryl ether ketone)s containing both diphenyl moiety and amide linkages in the main chains
作者:Mingzhong Cai、Meihua Zhu、Pingping Wang、Caisheng Song
DOI:10.1016/j.polymer.2010.01.041
日期:2010.3
New monomers, 4,4′-bis(4-phenoxybenzoyl)diphenyl (BPOBDP) and N,N′-bis(4-phenoxybenzoyl)-p-phenylenediamine (BPBPPD), were conveniently synthesized via simple synthetic procedures from readily available materials. A series of novel poly(aryl ether ketone)s containing both diphenyl moiety and amide linkages in the main chains were prepared by electrophilic Friedel–Crafts solution copolycondensation
新的单体4,4'-双(4-苯氧基苯甲酰基)联苯(BPOBDP)和N,N'-双(4-苯氧基苯甲酰基)-对苯二胺(BPBPPD)可以通过简单的合成方法方便地从容易获得的材料中合成。通过亲和力的间苯二甲酰氯(IPC)与BPOBDP和BPBPPD的混合物进行亲电的Friedel-Crafts溶液共缩聚反应,制得了一系列在主链中同时包含二苯基部分和酰胺键的新型聚(芳基醚酮)。在无水AlCl 3和N-甲基吡咯烷酮(NMP)在1,2-二氯乙烷(DCE)中的存在下,BPOBDP / BPBPPD摩尔比。所有聚合物均为半结晶,并且T g显着提高由于在主链中引入了联苯部分和酰胺键,因此比市售的PEEK和PEKK好。BPBPPD为40–60 mol%的聚合物不仅具有183–189°C的高T g s,而且具有314–328°C的中度T m s,非常适合于熔融加工。这些聚合物的拉伸强度为107.4–111.5 MPa,杨氏模量为2