POLYMERIZATION OF ALPHA-HALOGENATED P-XYLENES WITH BASE
POLYMERIZATION OF ALPHA-HALOGENATED P-XYLENES WITH BASE
复制标题
DOI：
10.1002/pol.1966.150040602
复制
发表时间：
1966-01-01
期刊：
影响因子：
--
通讯作者：
WHEELWRIGHT, WL
中科院分区：
文献类型：
--
作者：
GILCH, HG;WHEELWRIGHT, WL
各种α - halo - p -二甲苯已与碱产对二甲苯聚合物聚合。该反应涉及1,6 -脱氢卤化反应，得到二甲苯，然后聚合。α，α′‐二氯‐对二甲苯形成聚α‐氯‐对二甲苯和含有二苯乙烯单元的聚合物；α,α,α’,α’必经四氯量p量二甲苯给保利量α,α,α’必经trichloro量p量苯二甲基;烷基、芳基和卤素环取代α -氯-对二甲苯得到相应的环取代聚-对二甲苯。α位上的卤素越多（最多5个），脱氢卤化所需的碱越弱。甲醇中的氢氧化钠可以聚合四氯-对二甲苯，而回流二甲苯中的叔丁二氧化钾是聚合α -氯-对二甲苯所必需的。当α -光环-对-二甲苯在极性溶剂如二甲亚砜中与丁氧化钾反应时，形成二苯乙烯。
Various α‐halo‐p‐xylenes have been polymerized with base yieldingp‐xylylene polymers. The reaction involves a 1,6‐dehydrohalogenation to give a xylylene which then polymerizes. α,α′‐Dichloro‐p‐xylene forms poly‐α‐chloro‐p‐xylylene and polymers containing stilbene units; α,α,α′,α′‐tetrachloro‐p‐xylene gives poly‐α,α,α′‐trichloro‐p‐xylylene; alkyl, aryl, and halogen ring‐substituted α‐chloro‐p‐xylenes give the corresponding ring‐substituted poly‐p‐xylylenes. The more halogens in the α positions (up to five), the weaker the base necessary for dehydrohalogenation. Sodium hydroxide in methanol will polymerize tetrachloro‐p‐xylene, while potassiumtert‐butoxide in refluxingp‐xylene is necessary to polymerize α‐chloro‐p‐xylenes. Stilbenes are formed when α‐halo‐p‐xylenes are reacted with potassiumtert‐butoxide in polar solvents such as dimethyl sulfoxide.