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241 Newest Publications about the topic polyamides

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Toughening of polyamide‐6 with little loss in modulus by block copolymer containing poly(styrene‐alt‐maleic acid) segment

16-Mar-2017 | Ren He, Xiaoli Zhan, Qinghua Zhang, Fengqiu Chen, Journal of Applied Polymer Science, 2017

ABSTRACT Toughening of polyamide‐6 (PA6) by elastomers without sacrificing the modulus of blends has always been a challenge. In this study, PA6 was modified by poly(styrene‐alt‐maleic acid)‐block‐polystyrene‐block‐poly(n‐butyl acrylate)‐block‐polystyrene tetrablock copolymer (BCP) elastomer. ...

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Solution‐processable transmissive‐to‐green switching electrochromic polyamides bearing 2,7‐bis(diphenylamino)naphthalene units

15-Feb-2017 | Sheng‐Huei Hsiao, Jhong‐Syuan Han, Journal of Polymer Science Part A: Polymer Chemistry, 2017

ABSTRACT A new 2,7‐bis(diphenylamino)naphthalene‐based diamine monomer, N,N′‐bis(4‐aminophenyl)‐N,N′‐bis(4‐methoxyphenyl)‐2,7‐naphthalenediamine, was synthesized and polymerized with various aromatic dicarboxylic acids via the phosphorylation polyamidation reaction leading to a new series of ...

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Differential Gelation and Self‐Sorting Properties of Two Isomeric Polyamides Due to the Parallel vs Anti‐Parallel Alignment of Backbone Dipoles

14-Feb-2017 | Chui-Fan Leung, Hak-Fun Chow, Chemistry - A European Journal, 2017

Two isomeric bottlebrush polyamides P‐1 and A‐1 having the same repeating monomer dipole units aligned along the polymer backbone in pseudo‐parallel and pseudo‐anti‐parallel, respectively, were synthesized and characterized. Both polymers can form thermoreversible gels with aromatic solvents but ...

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Synthesis and properties of novel soluble polyamides containing both fluorene or xanthene cardo moieties and fluorinated phenoxy pendant groups

07-Feb-2017 | Huan Wen, Bin Huang, Feihua Zou, Mingzhong Cai, Polymer Engineering and Science, 2017

A series of novel aromatic polyamides containing both fluorene or xanthene cardo moieties and fluorinated phenoxy pendant groups were synthesized from two fluorinated isophthaloyl chlorides and four diamines containing cardo groups by the low‐temperature solution polycondensation in ...

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Solution‐processable and electroactive aromatic polyamides with 3,5‐bis(trifluoromethyl)triphenylamine moiety

24-Jan-2017 | Sheng‐Huei Hsiao, Chien‐Nan Wu, Polymer International, 2017

Abstract New fluorine‐containing, triphenylamine‐based diamine and dicarboxylic acid monomers, namely 3,5‐bis(trifluoromethyl)‐4’,4”‐diaminotriphenylamine (3a) and 3,5‐bis(trifluoromethyl)‐4’,4”‐dicarboxytriphenylamine (3b), were synthesized and polymerized with commercially available aromatic ...

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Synthetic genome readers target clustered binding sites across diverse chromatin states [Biochemistry]

22-Nov-2016 | Graham S. Erwin; Matthew P. Grieshop; Devesh Bhimsaria; Truman J. Do; José A. Rodríguez-Martínez; Charu Mehta; Kanik ..., Proceedings of the National Academy of Sciences current issue, 2016

Targeting the genome with sequence-specific DNA-binding molecules is a major goal at the interface of chemistry, biology, and precision medicine. Polyamides, composed of N-methylpyrrole and N-methylimidazole monomers, are a class of synthetic molecules that can be rationally designed to “read” ...

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Multifunctional Materials for Cancer Therapy: From Antitumoral Agents to Innovative Administration

17-Nov-2016 | Yipel, Mustafa; V. Ghica, Mihaela; G. Albu Kaya, Madalina; Spoiala, Angela; Radulescu, Marius; Ficai, Denisa; Ficai, ..., Organic Chemistry, 2016

Abstract: By the developmentof new antineoplastic drugs addressed tospecific sites (key to tumor growth), targeted agents, which do not interfere with most normal cells have many advantages like fewer side effects (as personalized treatment), and prolonged survival time of cancer patients ...

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Triphenylamine-based redox-active aramids with 1-piperidinyl substituent as an auxiliary donor: Enhanced electrochemical stability and electrochromic performance

07-Nov-2016 | Author(s): Sheng-Huei Hsiao, Ying-Hsiu Hsiao, Yu-Ruei Kung, Chyi-Ming Leu, Tzong-Ming Lee, Reactive and Functional Polymers, 2016

Publication date: November 2016 Source:Reactive and Functional Polymers, Volume 108 Author(s): Sheng-Huei Hsiao, Ying-Hsiu Hsiao, Yu-Ruei Kung, Chyi-Ming Leu, Tzong-Ming Lee A new triphenylamine-based diamine monomer 4,4′-diamino-4″-(1-piperidinyl)triphenylamine was synthesized ...

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Sliding on DNA: From Peptides to Small Molecules

04-Nov-2016 | Kan Xiong, Graham S. Erwin, Aseem Z. Ansari, Paul C. Blainey, Angewandte Chemie International Edition, 2016

Abstract Many DNA binding proteins utilize one‐dimensional (1D) diffusion along DNA to accelerate their DNA target recognition. Although 1D diffusion of proteins along DNA has been studied for decades, a quantitative understanding is only beginning to emerge and few chemical tools are ...

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RNA polymerase II senses obstruction in the DNA minor groove via a conserved sensor motif [Biochemistry]

01-Nov-2016 | Liang Xu; Wei Wang; Deanna Gotte; Fei Yang; Alissa A. Hare; Timothy R. Welch; Benjamin C. Li; Ji Hyun Shin; Jenny Ch ..., Proceedings of the National Academy of Sciences current issue, 2016

RNA polymerase II (pol II) encounters numerous barriers during transcription elongation, including DNA strand breaks, DNA lesions, and nucleosomes. Pyrrole-imidazole (Py-Im) polyamides bind to the minor groove of DNA with programmable sequence specificity and high affinity. Previous studies ...

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