POLYSTYRENE STAR-SHAPED POLYMERS MADE BY THE NEW

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FAZELI N.; TAROMI F.A.

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Journal Paper

Paper Information

Journal: Iranian Polymer Journal Year:2002 | Volume:11 | Issue:3 Page(s): 197-205

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Information Journal Paper

Title

POLYSTYRENE STAR-SHAPED POLYMERS MADE BY THE NEW "IN-IN" METHOD

Author(s)

FAZELI N. | TAROMI F.A. | Issue Writer Certificate

Keywords

DOUBLE-STAR POLYMER

HETERO-ARM STAR POLYMER

LIVING CHAIN

CARBANION

GELATION

Abstract

Three main methods area usually used for the synthesis of star-shaped polymers, where each one has its own advantages and disadvantages. Among these techniques, "in-out" method is the best one to produce HETERO-ARM STAR POLYMERs with narrow molecular weight distribution and long arms with active sites at the end of the second-generation arms. This method, however, has some difficulties during the synthesis of HETERO-ARM STAR POLYMERs with styrene or dienes as the second monomers. The reason is that in the "out" step, the CARBANIONs of the growing chains attack the existing double bonds of the other cores and produce an irreversible gel. The new "in-in" method mentioned in this paper, is used to synthesize double-star polystyrene polymers with relatively narrow molecular weight distribution and without occurrence of any GELATION during the process; With the monomers, which are able to attack the existing double bonds of the cores of the star polymers, it is also possible to produce HETERO-ARM STAR POLYMERs using this new method.

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APA: Copy

FAZELI, N., & TAROMI, F.A.. (2002). POLYSTYRENE STAR-SHAPED POLYMERS MADE BY THE NEW "IN-IN" METHOD. IRANIAN POLYMER JOURNAL (ENGLISH), 11(3), 197-205. SID. https://sid.ir/paper/530542/en

Vancouver: Copy

FAZELI N., TAROMI F.A.. POLYSTYRENE STAR-SHAPED POLYMERS MADE BY THE NEW "IN-IN" METHOD. IRANIAN POLYMER JOURNAL (ENGLISH)[Internet]. 2002;11(3):197-205. Available from: https://sid.ir/paper/530542/en

IEEE: Copy

N. FAZELI, and F.A. TAROMI, “POLYSTYRENE STAR-SHAPED POLYMERS MADE BY THE NEW "IN-IN" METHOD,” IRANIAN POLYMER JOURNAL (ENGLISH), vol. 11, no. 3, pp. 197–205, 2002, [Online]. Available: https://sid.ir/paper/530542/en

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