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Date: 20-9-2017
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Date: 26-5-2020
431
Date: 26-9-2017
429
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Several different techniques for preparing block copolymers have been developed, many of which use condensation reactions (next section). At this point, our discussion will be limited to an application of anionic polymerization. In the anionic polymerization of styrene , a reactive site remains at the end of the chain until it is quenched. The unquenched polymer has been termed a living polymer, and if additional styrene or a different suitable monomer is added a block polymer will form. This is illustrated for methyl methacrylate in the following diagram.
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10 دقائق قبل النوم.. هذا الأسلوب يساهم في تحسين يومك
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الأسباب الشائعة لتفريغ شحن البطارية
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قسم المشاريع الهندسية: مواد معمل العطاء الأوّلية الإنشائية تطابق المواصفات القياسية
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