Synthesis of novel block

The BCI3 catalysed synthesis of novel block co-polymers of PVC with isobutylene is thought to involve microcations formed by extraction of a chloride ion activated by the chemical introduction of some unsaturation (44) (equation 17). 

ALLEN ET AL. Studies on the Synthesis of Novel Block lonomers... 

Shuai X-T, Jedlinski Z, Luo Q, Farhod N (2000) Synthesis of novel block copolymers of poly(3-hydroxybutyric acid) with poly(ethylene glycol) through anionic polymerizeition. Chin J Polym Sci 18 19-23... 

Vamvakaki, M., Billingham, N.C. and Armes, S.P. (1998) Synthesis of novel block and statistical methacrylate based ionomers containing acid, basic or betaine residues. Polymer, 39,2331-2337. 

Xu W, Chung Ch, Kwon Y (2007) Synthesis of novel block copolymers containing polyhedral oligomeric sUsesquioxane (POSS) pendent groups via ring-opening metathesis polymerization (ROMP). Polymer 48 6286-6293... 

Tai, H. Y., Popov, V. K, Shakesheff, K. M. Howdle, S. M. (2007). Putting the fizz into chemistry applications of supercritical carbon dioxide in tissue engineering, drug delivery and synthesis of novel block copolymers. Biochemical Society Transactions 35 516-521. 

Higashihara, T. and Ueda, M. (2009b) Living anionic polymerization of 4-vinyltriphenylamine for synthesis of novel block copolymers containing low-polydisperse poly(4-vinyltriphenylamine) and regioregular poly(3-hexylthio-phene) segments. Macromolecules, 42, 8794—8800. 

It is also possible to introduce polymerizable groups at the focal point of dendritic macromolecules and a number of authors have demonstrated the synthesis of novel hybrid dendritic-linear block copolymers by this methodology [69-73]. Initial experiments in the use of the dendritic macromonomers involved the preparation of a series of polyether dendrimers, such as the third generation derivative, 37, which contains a single styrene at its focal point [74]. Copolymerization of 37 with styrene then affords a hybrid block copolymer, 38, in which... 

In conclusion, the synthesis of novel stars comprising eight PSt-b-PIB and Pp-ClSt-b-PIB arms radiating from a calix[8]arene core has been accomplished. Overall compositions and relative molecular weights of the glassy segments can be controlled by suitable choice of blocking conditions such as solvent polarity. 

As the example of molecular magnetism shows, modern magnetochemistry is now seeing more efforts toward the directed design and synthesis of novel magnetic materials, usually based on molecular building blocks as opposed to traditional two-or three-dimensional solid-state networks (bulk metals, metal oxides, etc.). 

One of the primary aims of the research program described in this review has been the incorporation of bisdiene and bisdienophilic building blocks into the synthesis of novel macropolycyclic structures by a repetitive Diels-Alder oligo-... 

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