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Branched Polymers I Episode 2

Tham khảo tài liệu 'branched polymers i episode 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Asymmetric Star Polymers Synthesis and Properties Nikos Hadjichristidis Stergios Pispas Marinos Pitsikalis Hermis latrou and Costas Vlahos Department of Chemistry University of Athens Panepistimiopolis Zografou 15771 Athens Greece E-mail nhadjich@atlas.uoa.gr The synthesis and the properties both in bulk and in solution of asymmetric star polymers are reviewed. Asymmetry is introduced when arms of different molecular weight chemical nature or topology are incorporated into the same molecule. The phase separation aggregation phenomena dilute solution properties etc. are examined from a theoretical and experimental point of view. Recent applications of these materials show their importance in modern technologies. Keywords. Asymmetry Miktoarm stars Synthesis Morphology Aggregation Chain conformation List of Symbols and Abbrevations. 72 1 Introduction. 74 2 Synthesis. 75 2.1 Stars with Molecular Weight Asymmetry. 75 2.2 Stars with Chemical Asymmetry. 78 2.2.1 Miktoarm Stars. 78 2.2.1.1 General Strategies and Methods . 78 2.2.1.2 Synthesis of A2B Miktoarm Star Copolymers . 82 2.2.1.3 Synthesis of A3B Miktoarm Star Copolymers. 85 2.2.1.4 Synthesis of AnB n 5 Miktoarm Star Copolymers . 85 2.2.1.5 Synthesis of A2B2 Miktoarm Star Copolymers . 88 2.2.1.6 Synthesis of AnBn n 2 Miktoarm Star Copolymers . 89 2.2.1.7 Synthesis of ABC Miktoarm Star Terpolymers. 93 2.2.1.8 Synthesis of ABCD Miktoarm Star Quaterpolymers . 96 2.2.2 Asymmetric w-Functionalized Polymers. 97 2.3 Stars with Topological Asymmetry . 98 3 Properties. 100 3.1 Solution Properties. 100 3.1.1 Theory . 100 3.1.2 Experimental Results. 104 3.2 Bulk Properties . 110 Advances in Polymer Science Vol.142 Springer-Verlag Berlin Heidelberg 1999 72 N. Hadjichristidis S. Pispas M. Pitsikalis H. latrou C. Vlahos 3.2.1 Theory.110 3.2.2 Experimental Results.115 4 Applications.123 5 Concluding Remarks.124 6 References and Notes.125 List of Symbols and abbreviations A AIBN Bd cgel d D Duller dMaplì DOP DSC DVB f fi g g rà .