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    • 14. 发明授权
    • Para-phenylene sulfide block copolymer, process for the production of
the same
    • 对亚苯基硫醚嵌段共聚物,生产过程相同
    • US4785057A
    • 1988-11-15
    • US858851
    • 1986-04-30
    • Zenya ShiikiTakayuki KattoYo IizukaTakao IwasakiToshitaka Kouyama
    • Zenya ShiikiTakayuki KattoYo IizukaTakao IwasakiToshitaka Kouyama
    • C08G75/0254C08G75/0245H01B3/30H05K1/03C08G75/14C08G75/16
    • H01B3/301C08G75/0231C08G75/0245C08G75/0254D01F6/765D01F6/78H05K1/0333Y10S428/901Y10T428/24909Y10T428/24917Y10T428/31533
    • A para-phenylene sulfide block copolymer consisting essentially of a recurring unit (A) ##STR1## and a recurring unit (B) ##STR2## said recurring units (A) being present in the form of a block of 20 to 5,000 units of (A) on the average in the molecular chain, the mol fraction of the recurring units (A) being in the range of 0.50 to 0.98, the block copolymer having a melt viscosity (.eta.*) of 50 to 100,000 poise as determined at 310.degree. C. at a shear rate of 200 sec.sup.-1 and having: (a) a glass transition temperature (Tg) of 20.degree. to 80.degree. C., (b) a crystalline melting point (Tm) of 250.degree. to 285.degree. C., and (c) a crystallization index (Ci) of 15 to 45, this value being that of the heat-treated, but not stretch-oriented copolymer, which block copolymer is preferably produced by a process comprising a first step of heating an aprotic polar organic solvent containing a dihaloaromatic compound consisting essentially of a m-dihalobenzene and an alkali metal sulfide to form a reaction liquid (E) containing a m-phenylene sulfide polymer consisting essentially of recurring units (B) ##STR3## and a second step of adding a p-dihalobenzene to the reaction liquid (E) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of the recurring units (B) and recurring units (A) ##STR4##
    • 基本上由重复单元(A)< IMAGE>和重复单元(B)< IMAGE>组成的对亚苯基硫醚嵌段共聚物表示重复单元(A)以20-5,000单位( A)平均分子链中,重复单元(A)的摩尔分数在0.50〜0.98范围内,嵌段共聚物的熔体粘度(η)为50〜100,000泊,在310℃下测定 (a)玻璃化转变温度(Tg)为20〜80℃,(b)结晶熔点(Tm)为250〜285℃ ,(c)15〜45的结晶指数(Ci),该值为热处理而不是拉伸取向共聚物的值,该嵌段共聚物优选通过包括加热第 含有主要由间二卤代苯和碱金属硫化物组成的二卤代芳族化合物的非质子极性有机溶剂形成反应液 (E),其包含基本上由重复单元(B)组成的间苯硫醚聚合物,第二步是将对二卤代苯加入到反应液(E)中,并在碱金属硫化物存在下加热混合物 和非质子极性有机溶剂以形成基本上由重复单元(B)和重复单元(A)组成的嵌段共聚物。