Synthesis and Characterization of Small Molecules with Isoindigo Substituted Dye End Groups

In order to prepare carboxyl-terminated hyperbranched polyester (HBP-COOH), succinic anhydride was used to modify hydroxyl-terminated hyperbranched polyester (HBP-OH), and the influences of the solvents, catalysts and time on the product’s structure were investigated. When THF is used as the solvent, sodium acetate as the catalyst, the molar ratio of succinic anhydride and hydroxyl groups is 3:1, and the reaction time is 6 h at 65°C, the modification extent of the hydroxyl groups is about 99% with about 95% yield. HBP-COOH has much lower glass transition temperature than that of HBP-OH due to its long and flexible end-groups.

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Synthesis and characterization of PEE-PEO diblock copolymers with complementary end-groups for hydrogen-bond heteroassociation

Journal of Polymer Science Part A Polymer Chemistry ◽

10.1002/(sici)1099-0518(20000101)38:1<207::aid-pola26>3.0.co;2-9 ◽

2000 ◽

Vol 38 (1) ◽

pp. 207-219 ◽

Cited By ~ 10

Author(s):

Peng Zhang ◽

Jeffrey S. Moore

Keyword(s):

Hydrogen Bond ◽

Diblock Copolymers ◽

Synthesis And Characterization ◽

End Groups

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Synthesis and characterization of chiral poly(l-lactide-b-hexyl isocyanate) macromonomers with norbornenyl end groups and their homopolymerization through ring opening metathesis polymerization to afford polymer brushes

Journal of Polymer Science Part A Polymer Chemistry ◽

10.1002/pola.28471 ◽

2017 ◽

Vol 55 (6) ◽

pp. 1102-1112 ◽

Cited By ~ 5

Author(s):

Ioannis Choinopoulos ◽

Spyros Koinis ◽

Marinos Pitsikalis

Keyword(s):

Polymer Brushes ◽

Ring Opening ◽

Synthesis And Characterization ◽

Ring Opening Metathesis Polymerization ◽

Metathesis Polymerization ◽

End Groups

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Synthesis and Characterization of A2+B4 Hyperbranched Polyesters with Hydroxyl End Groups

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.937.80 ◽

2014 ◽

Vol 937 ◽

pp. 80-85 ◽

Cited By ~ 2

Author(s):

Haroon A.M. Saeed ◽

Yassir A. Eltahir ◽

Yu Min Xia ◽

Yi Min Wang

Keyword(s):

Weight Loss ◽

Isophthalic Acid ◽

Synthesis And Characterization ◽

Degree Of Branching ◽

H Nmr ◽

Hyperbranched Polyesters ◽

Melt Polycondensation ◽

End Groups ◽

C Nmr

Hydroxyl-terminated hyperbranched polyesters (HBPET) with aromatic-aliphatic structure were synthesized by melt polycondensation of isophthalic acid and pentaerythritol via A2+ B4 approach, at three different monomer mole ratios (A2/B4 =1:1, 1.5:1, 2:1, respectively). Fourier transform infrared (FTIR) spectroscopy indicated that the expected HBPET. The degree of branching of the HBPET was estimated to be between 0.39–0.45 by 1H-NMR and 13C-NMR measurement. The thermogravimetric analysis ( TGA ) measurement revealed that HBPET had a 10 % weight-loss at 350°C in N2.

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