کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9559388 | 1381167 | 2005 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and development of a dilithium initiator and its use for the preparation of ABA-block copolymers in non-polar medium: the use of Ï-complexing additives
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In a former article the dissociation of organolithium salts due to Ï-complexing additives is described. Durene and tetraphenylethylene tend to break up at least partly the dimeric structure of polystyryllithium in non-polar solvents, as well as higher aggregates such as those formed by polybutadienyllithium. In this research these Ï-complexing additives are used to break up a similar association, i.e. the formation of tridimensional insoluble multifunctional initiator mixtures, when a bifunctional initiator is synthesized, using a precursor and a 2-fold excess of butyllithium. As the precursor mainly 1,3-diisopropenylbenzene (m-DIB) is used, but also 1,3-di(1-phenylethenyl)benzene (PEB) is examined. Subsequent addition of styrene in the presence of durene and tetraphenylethylene gives satisfying results in the synthesis of SBS-triblock copolymers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 46, Issue 2, 12 January 2005, Pages 303-318
Journal: Polymer - Volume 46, Issue 2, 12 January 2005, Pages 303-318
نویسندگان
Jurgen Hofmans, Marcel Van Beylen,