Macromol. Chem. Phys. 5/2012

Hu, Ziqiang; Xu, Yongping; Wu, Di; Li, Bin; Huang, Yuan; Jiang, Jianxiong; Lai, Guoqiao; Luh, Tien‐Yau

doi:10.1002/macp.201290016

Cited by 6 publications

(10 citation statements)

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“…HBPBOs also showed the diffraction peaks at about 16.6-17.4 , but the shapes of these peaks become broaden, and the intensities were weakened, indicating the branched structures induced steric hindrance between polymer chains and hampered the close packing, which were contributed to the better solubility of HBPBOs. 23 The thermal stabilities of HBPBOs were tested by TGA. The TGA and derivative thermogravimetry (DTG) curves of FPBO and HBPBOs are shown in Figure 5.…”

Section: Synthesis and Characterization Of Hbpbosmentioning

confidence: 99%

“…However, the k max of HBPBO-1, HBPBO-2, and HBPBO-3 blue-shift to 324, 326, and 330 nm, respectively, indicating the coplanarity of rigid chains has been distorted by the kinked structure of HBPBOs. 23,33 The introduction of branched structure has also shortened the conjugated length, the combined effect the above resulted the large blue-shift of absorption peaks. Moreover, there were addition peaks at about 217-240 nm in HBPBOs, which we attributed to the characteristic peaks of functional benzoic acid, aniline, or phenol groups at periphery.…”

Section: Synthesis and Characterization Of Hbpbosmentioning

confidence: 99%

“…18 Additionally, the high level endgroup functionality in HBPs could improve the compatibility or reactivity to polymer matrix, and the branched structure in HBPs could further provide mechanical interlocking to other polymers. 21 Given the merits of HBPs, numerous hyperbranched aromatic polymers, such as hyperbranched PBI, 22 PBT, 23 PI, 24 poly(arylene ether)s, 25 and poly(ether ketone) 26 have been synthesized with the aim of improving their processibility and exploiting new functionalities. However, only a few papers on hyperbrached PBO (HBPBO) have been published.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of hyperbranched polybenzoxazoles and their molecular composites with epoxy resins

Wang

et al. 2015

J of Applied Polymer Sci

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Hyperbranched aromatic polymers have attracted great attention recently because they combined the processability of hyperbranched polymers and the high-level performance of aromatic polymers. Here, a one-pot strategy for the synthesis of hyperbranched Polybenzoxazoles (HBPBOs) by polycondensation of 2,2-Bis (3-amino-4-hydroxyphenyl) hexafluoropropane and 1,3,5-benzenetricarboxylic acid in Polyphosphoric acid was reported. The HBPBOs exhibited good solubility in organic solvents because of the branched structure and the flexible hexafluoropropane groups in main chains. The structure and terminal functional groups could be tailored by adjusting the molar ratio of two monomers. FT-IR, NMR and XRD measurements confirmed the structure of HBPBOs, while thermogravimetric analysis (TGA), UV-vis, and photoluminescence spectra, combined with the comparison with linear PBOs demonstrated the intriguing optical properties and good thermal stabilities of HBPBOs. The good solubility of HBPBOs also permitted their usage as molecular reinforcement for polymer composites as demonstrated in this study of HBPBOs/epoxy composites.

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Section: Synthesis and Characterization Of Hbpbosmentioning

confidence: 99%

Section: Synthesis and Characterization Of Hbpbosmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis of hyperbranched polybenzoxazoles and their molecular composites with epoxy resins

Wang

et al. 2015

J of Applied Polymer Sci

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“…The possibility of removal of the tether, which was also anticipated in our previous contributions, inspired our research work to develop further our class of compounds by introducing silyl‐based difunctional protecting groups as new kind of tethering group. Silyl‐based tethering groups have been reported in the case of bisacrylates, but no tether removal was reported . The homopolymer of p ‐hydroxymethylstyrene has been described before.…”

Section: Introductionmentioning

confidence: 99%

The efficient cyclopolymerization of silyl‐tethered styrenic difunctional monomers

Ferri

Ozaydin

Zeffiro

et al. 2018

J. Polym. Sci. Part A: Polym. Chem.

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The synthesis and characterization of innovative difunctional styrene‐based monomers and their cyclopolymerization is reported. Difunctional silyl‐based protecting groups with different steric hindrance (either methyl/phenyl or phenyl/phenyl) are used as “tethers” for two 4‐vinylbenzyl reactive moieties. We demonstrate that efficient cyclopolymerization, performed under free‐radical conditions or RAFT‐mediated, takes place for both monomers. RAFT polymerization allows excellent control of Mn and higher degree of polymerization when compared to uncontrolled radical polymerization, yet not optimal control of dispersities. The silyl tethering group could be removed to afford poly(p‐hydroxymethylstyrene). Thermogravimetric analysis (TGA) demonstrates the thermal robustness of the new cyclopolymers, and gives an insight on the ability of the corresponding deprotected polymer to chelate metals ions. The described strategy opens possibilities to achieve sequence control through a cyclopolymerization/tether removal strategy, when having two suitable aromatic systems with opposing electronic character and reactivities in chain cyclopolymerization. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 1593–1599

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“…[1][2][3][4] These polymers have been widely used in several applications, such as coatings, catalysis, additives, blends, etc. [5][6][7][8] A large number of HBPEs have been reported in the literature, and some are commercially available. [9][10][11] Investigation on the modification of HBPEs has become an important research direction.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of UV‐curable hyperbranched polyurethane (meth)acrylate oligomers via thiol‐ene “click” chemistry

Han

Lin

Yang

et al. 2012

J of Applied Polymer Sci

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First, the second‐generation hyperbranched poly(amine‐ester) (G2‐OH) was successfully prepared by thiol‐ene “click” chemistry. Subsequently, a series of photosensitive hyperbranched oligomers (G2‐ORs) were synthesized by facile modifications of the G2‐OH with acryloyl chloride, methacryloyl chloride, IPDI‐HEA, and IPDI‐HEMA, respectively. The structures of hyperbranched oligomers were characterized by element analysis, FT‐IR, 1H NMR, GPC and viscosity measurement. It was shown that these synthesized oligomers have narrow molecular weight distribution and low intrinsic viscosity at 30°C. UV–vis spectra results showed that the G2‐ORs had sharp absorption bands at around 202 nm. The results of photosensitivities measurement indicated that the G2‐Macr shows the highest photosensitive than other hyperbranched oligomers in the absence of photoinitiator. In addition, these UV‐cured photosensitive G2‐ORs had good thermal properties. The solubilities of the synthesized hyperbranched oligomers were also examined. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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Macromol. Chem. Phys. 5/2012

Cited by 6 publications

References 0 publications

Synthesis of hyperbranched polybenzoxazoles and their molecular composites with epoxy resins

Synthesis of hyperbranched polybenzoxazoles and their molecular composites with epoxy resins

The efficient cyclopolymerization of silyl‐tethered styrenic difunctional monomers

Synthesis of UV‐curable hyperbranched polyurethane (meth)acrylate oligomers via thiol‐ene “click” chemistry

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