Hyperbranched aromatic polyamid

Kim15,341 reported two related types of hyperbranched aromatic polyamides each employed amide bond formation for building block connectivity and was based on three-... [Pg.169]

Jikei, M., and Kakimoto, M. A. 2001. Hyperbranched aromatic polyamides prepared by direct polycondensation. High Perform. Polym., 13, S33-S43. [Pg.152]

Back JB, Tan LS. Quinoxaline-containing AB2 monomers for hyperbranched aromatic polyamides. US patent 6552195, assigned to the United States of America as represented by the Secretary of the Air Force, Washington, DC 2003. [Pg.316]

Y. Ishida, A. C. F. Sun, M. Jikei and M. Kakimoto, Synthesis of hyperbranched aromatic polyamides starting from dendrons as monomers Effect of monomer multiplicity on the degree of branching , Macromolecules, 2000, 33, 2832-8. [Pg.245]

G. Yang, M. Jikei, M. Kakimoto, Synthesis and properties of hyperbranched aromatic polyamide. Macromolecules, 32, 2215-2220 (1999). [Pg.24]

Froehling, P. E. Dendrimers and dyes-a review. Dyes and pigments, 48, 187-195 (2001). Jikei, M., Fujii. K., and Kakimoto, M. Synthesis and characterization of hyperbranched aromatic polyamide copolymers prepared from AB and AB monomers. Macromol. Symp., 2003,199,223-232 (2001). [Pg.49]

Kim YH (1992) Lyotropic liquid crystalline hyperbranched aromatic polyamides. J Am ChemSoc 114 4947 948... [Pg.111]

Jikei M, Chon SH, Kakimoto MA, Kawauchi S, Imase T, Watanebe J (1999) Synthesis of hyperbranched aromatic polyamide from aromatic diamines and tiimesic acid. Macnnnole-... [Pg.111]

Liou GS, Lin HY, Yen HJ (2009) Synthesis and characterization of electroactive hyperbranched aromatic polyamides based on A2B-type triphenylamine moieties. Mater Chem 19 7666-7673... [Pg.114]

Hakme C, Stevenson I, FulchironR, Seytre G, Clement F, OdoniL, Rochat S, Varlet J (2005) Dielectric studies of hyperbranched aromatic polyamide and polyamide-6,6 blends. J Appl Polym Sci 97 1522-1537... [Pg.121]

Hyperbranched polymers are formed by polymerization of AB,-monomers as first theoretically discussed by Flory. A wide variety of hyperbranched polymer structures such as aromatic polyethers and polyesters, aliphatic polyesters. polyphenylenes, and aromatic polyamides have been described in the literature. The structure of hyperbranched polymers allows some defects, i.e. the degree of branching (DB) is less than one. The synthesis of hyperbranched polymers can often be simplified compared to the one of dendrimers since it is not necessary to use protection/deprotection steps. The most common synthetic route follows a one-pot procedure " where AB,-monomers are condensated in the presence of a catalyst. Another method using a core molecule and an AB,-monomer has been described. ... [Pg.4]

Keywords Aromatic polyamides, diamine, separation applications, melt processing, solution processing, hyperbranched... [Pg.111]

Fan Z, Jaehnichen K, Desbois P, Haussler L, Vogel R, Voit B (2009) Blends of different linear polyamides with hyperbranched aromatic AB2 and A2-1-B3 polyesters. J Polym Sci A Polym Chem 47 3558-3572... [Pg.121]

Fan, Z., Hyperbranched aromatic polyesters and their apphcation in blends of hn-ear polyamides, Doctor rerum naturahmn dissertation, Technischen Universitat, Dresden (August, 2009). [Pg.53]

In the area of aromatic polyamides, condensation of 3,5-diaminobenzoyl chloride or 3-aminoisophthalyl chloride in an amide solvent gave hyperbranched pol)mier (Scheme 8). The GPC analysis of these polymers in a solvent containing a complexing salt showed that the molecular weight ranged between 24,000 and 46,000 with polydispersities of 2.0-3.2. GPC in the... [Pg.218]

On the other hand, aromatic polyamides exhibit polymer aggregation in the absence of a complexing salt, resulting in mesomorphism [54]. Similarly, a protonated hyperbranched amide with an amine center showed mesomorphism [95]. [Pg.231]

Shabbir S, Zulfiqar S, Sarwar Ml (2011) Amine-teuminated aromatic and semi-aromatic hyperbranched polyamides synthesis and characterizatitHi. J Polym Res 18 1919—1929... [Pg.114]

It was,and still is, a purpose of our work to illustrate the synthetic potential of "a-b monomers" in the field of aromatic polyethers, polyesters and polyamides (concentrating on polyesters in the present contribution). The preparation of star-shaped and hyperbranched polycondensates is plagued by side-reactions resulting in crosslinks, and thus, clean step-growth processes are a basic requirement for a successfid synthesis. In this connection the potential of silicon mediated polycondensations should be explored, because polycondensations of silylated monomers may be a cleaner process than that of the corresponding nonsilylated (protonated) monomers, for instance, because proton catalyzed side reactions, such as the Fries-rear-rangement, are avoided. [Pg.157]

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