Photopolymerizable acrylated hyperbranched polyisophthalesters used for photorefractive materials

Kou, Huiguang; Asif, Anila; Shi, Wenfang

doi:10.1016/s0014-3057(02)00105-2

Cited by 22 publications

(7 citation statements)

References 11 publications

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“…hb polymers based on DMPA with a variety of additional multifunctional core molecules have been prepared widely, and different end groups, reactive and nonreactive ones, have been introduced to render those polymers suitable for various applications as additives or as reactive components in resins and coatings 13, 151–154. End‐group modification also allows us to adjust the rheology and melt viscosity155 and the thermal transition temperatures, with T g being between 20 and 40 °C in the OH‐terminated hb polyester. Even though it seems to be the best monomer structure available, in general, the aliphatic Boltorn‐type hb polyesters still show some drawbacks regarding side reactions during melt polycondensation (cyclic and ether formation and decarboxylation), which finally limit the achievable molar masses 97, 156.…”

Section: Hb Polyestersmentioning

confidence: 99%

Hyperbranched polymers—All problems solved after 15 years of research?

Voit

2005

J. Polym. Sci. A Polym. Chem.

390

280

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Fifteen years of research on hyperbranched polymers in the group of Brigitte Voit are described, with a focus first on hyperbranched polyester synthesis and then on the addition and cycloaddition reactions used for the preparation of the hyperbranched structure. The characterization of structural details and bulk, solution, and thin-film properties is highlighted, and steps toward the elucidation of a general property profile of hyperbranched polymers are discussed. Some effects of hyperbranched polymers in reactive formulations and blends and in thin films are addressed that can lead to applications in coatings, as additives, and in microelectronics or sensor-

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Section: Hb Polyestersmentioning

confidence: 99%

Hyperbranched polymers—All problems solved after 15 years of research?

Voit

2005

J. Polym. Sci. A Polym. Chem.

390

280

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“…[5][6][7][8][9] We have also previously described The use of aliphatic-aromatic polyester modified with vinyl ether [10] or oxetane [11] functionalities as reactive comonomer in cationic photocuring. Subsequently the potential of a similar hyperbranched polyester, but containing its original phenolic end groups, as chain-transfer additives in cationic photopolymerization of epoxy based resins was demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Fluorinated Hyperbranched Polymers and Their Use as Additives in Cationic Photopolymerization

Sangermano

Gianni

Bongiovanni

et al. 2005

Macro Materials & Eng

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Summary: A fluorine containing hyperbranched polymer was synthesized by modifying an aromatic‐aliphatic hyperbranched polyester with a semifluorinated alcohol via a Mitsunobu reaction and was subsequently used as an additive in cationic photopolymerization of an epoxy resin. The remaining OH groups of the fluorinated hyperbranched polymer interact with the polymeric carbocation through a chain‐transfer mechanism inducing an increase in the final epoxy conversion. The fluorinated HBP induces modification of bulk and surface properties, with an increase in Tg and surface hydrophobicity already reached at very low concentration. The HBFP additive can, therefore, protect the coatings from aggressive solvents, increases hardness, and allows the preparation of a low energy surface coating.

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“…The absorption peaks at 2969, 1060, and 985 cm À1 reveal the presence of the C-H group, the strong absorption peak at 1724 indicates the presence of the C5 5O group, and the absorption peaks at 1635 and 1618 cm À1 correspond to the C5 5C bond [16,17]. [18,19]. Fig.…”

Section: Characterization Of Dtmpamentioning

confidence: 94%