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首页> 外文期刊>Polymers for advanced technologies >Synthesis of 2,2'-biphenol- and 1,1'-bi(2-napthol)-based poly(ether sulfones) and copolymers by classical step-growth polymerization and by entropically-driven ring-opening polymerization of macrocyclic oligomers
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Synthesis of 2,2'-biphenol- and 1,1'-bi(2-napthol)-based poly(ether sulfones) and copolymers by classical step-growth polymerization and by entropically-driven ring-opening polymerization of macrocyclic oligomers

机译：通过经典的逐步增长聚合反应和大环低聚物的熵驱动开环聚合反应合成2,2'-双酚和1,1'-联（2-萘酚）基聚醚砜和共聚物

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摘要

2,2'-Biphenol- and (R/S)- and (R)-1,1'-bi(2-naphthol)-based polysulfones were synthesized by classical step-growth polymerizations and by entropically-driven ring-opening polymerizations (EDROPs) of the corresponding macrocyclic oligomers (MCOs). To facilitate comparisons, the polysulfone derived from 4,4'-cyclohexylidenebisphenol was synthesized similarly. ED-ROP was also used to prepare copolymers. The molecular weights obtained using ED-ROP were generally higher than those obtained using the classical step growth method. The MCOs required as the starting materials for ED-ROPs were prepared by classical high dilution syntheses using the biphenols and bis(4-chlorophenyl)sulfone in the presence of base. The cyclic dimer from a high dilution synthesis using (R)-1,1'-bi-2-naphthol and the cyclic dimer from a similar synthesis using 4,4'-cyclohexylidenebisphenol were isolated as pure compounds by column chromatography and the molecular structures determined by single crystal X-ray diffraction.
机译：通过经典的逐步增长聚合反应和通过熵驱动的开环聚合反应合成了2,2'-联苯酚和（R / S）-以及（R）-1,1'-联（2-萘酚）基聚砜相应的大环低聚物（MCO）的（EDROP）。为了便于比较，类似地合成了衍生自4,4'-环己叉基双酚的聚砜。 ED-ROP也用于制备共聚物。使用ED-ROP获得的分子量通常高于使用经典逐步生长法获得的分子量。 ED-ROPs起始原料所需的MCO是在碱存在下，使用双酚和双（4-氯苯基）砜通过经典的高稀释度合成方法制备的。使用（R）-1,1'-bi-2-萘酚通过高稀释度合成得到的环状二聚体和使用4,4'-环己叉基双酚的类似合成得到的环状二聚体通过柱色谱法分离为纯化合物，并且分子结构通过单晶X射线衍射测定。

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