Poly segmented copolymer synthesis

Polyether-PA segmented copolymers, synthesizing, 191-192 Polyether polyols, 200, 205, 211-212 synthesis of, 223, 224 Poly(ether sulfone) (PES), 327. See also Poly(arylene ether sulfone)s Poly(phenylene ether sulfone) chains Sulfonated poly (ary lene ether sulfone)... 

Synthesis of Poly(Aryl Ester)-Polysiloxane Segmented Copolymers 117)... 

Johnson BC, Yilgor I, McGrath JE (1984) Synthesis of poly(imide)-polysiloxane segmented copolymers. Polymer Preprints 25(2) 54... 

Smith S D (1991) MS thesis. Synthesis and characterization of perfectly alternating segmented copolymers comprised of poly(dimethylsiloxane)s and engineering thermoplastics. Virginia Polytechnic Institute and State University, Blacksburg... 

Bott RH, Summers JD, Arnold CA, Taylor LT,Ward TC, McGrath JE (1987) Synthesis and characteristics of novel poly(imide siloxane) segmented copolymers. J Adhes 23(2) 67... 

Wescott James M,Yoon Tae Ho, Rodrigues David, Kiefer Laura A, Wilkes Garth L and McGrath JE (1994) Synthesis and characterization of triphenylphosphine oxide containing poly(aryl imide)-poly(dimethyl siloxane) randomly segmented copolymers JMS.-Pure Appl Chem A31(8) 1071... 

Buckwalter DJ, Zhang MQ, Inglefield DL, Moore RB, Long TE (2013) Synthesis and characterization of siloxane-containing poly(urea oxamide) segmented copolymers. Polymer 54(18) 4849 857... 

Transesterification with glycol is frequently used to prepare telechelic diols of PHB and P(HB-co-HV) in the presence of dibutyl tin dilaurate as catalyst [ 160]. The ensuing oligomers with well-defined end groups are suitable for the synthesis of block copolymers [161, 162], whose mechanical properties depend on the ratio of hard and soft segments. The synthesis of poly(H3B-co-caprolactone, CL) uses this principle, where the transesterification of the homopolymers, catalyzed by acids, results in the formation of random or microblock copolymers [163]. With rising CL content, a decrease in Tg is observed from 2 down to -42°C, for CL contents of 0 and 72 per cent, respectively. 

O. Henze and W. J. Feast, The synthesis of amphiphilic sexithiophene-poly(ethylene oxide) segmented copolymers, J. Mater. Chem., 13, 1274-1278 (2003). 

R.J. Gayman, J.L. de Haan, Segmented copolymers with poly(ester amide) units of uniform length Synthesis, Polymer 34 (20) 4360-4364,1993. 

Hydrosilation reactions have been one of the earlier techniques utilized in the preparation of siloxane containing block copolymers 22,23). A major application of this method has been in the synthesis of polysiloxane-poly(alkylene oxide) block copolymers 23), which find extensive applications as emulsifiers and stabilizers, especially in the urethane foam formulations 23-43). These types of reactions are conducted between silane (Si H) terminated siloxane oligomers and olefinically terminated poly-(alkylene oxide) oligomers. Consequently the resulting system contains (Si—C) linkages between different segments. Earlier developments in the field have been reviewed 22, 23,43> Recently hydrosilation reactions have been used effectively by Ringsdorf 255) and Finkelmann 256) for the synthesis of various novel thermoplastic liquid crystalline copolymers where siloxanes have been utilized as flexible spacers. Introduction of flexible siloxanes also improved the processibility of these materials. 

Walch E. and Caymans R.J., Synthesis and properties of poly(butylenes terephthalate)-b-polyisobutylene segmented block copolymers, Polymer, 35, 636, 1994. 

McGrath, /. E, Dunson, A L., Hedrick,l L.i Synthesis and Characterization of Segmented Poly-imide-Polyorganosiloxane Copolymers. Vol. 140, pp. 61-106. 

H. Wang, L. Duan, Y. Qui, X. Wang, and D. Liu, Synthesis and electroluminescence properties of a novel poly(p-phenylene vinylene)-based copolymer with tri(ethylene oxide) segments on the backbone, J. Appl. Polym. Sci., 83 2195-2200, 2002. 

In a similar way, the grafting-from technique has been applied to the synthesis of poly(chloroethylvinylether) chains by grafted PCL segments, i.e., po-ly(CEVE-g-CL) graft copolymers. Purposely cationically prepared PCEVE were partially modified by the introduction of 5-10% hydroxyl groups [79]. An equimolar reaction of the pendant hydroxyl functions with HAI/BU2 provided diisobutyl aluminum monoalkoxides dispersed along the polyether backbone. 

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