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Modified Triphenylmethane-based Polyimides with Improved Optical,Dielectric and Solubility Properties via post-polymerization modification

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Chinese Journal of Polymer Science 2023年第10期41卷 1609-1616页

作者： Yan-Cheng Wu Guo-Tao Huang Man-Yu Lian Rui Liang Hong-Lin Deng Feng Gan Yang-Fan Zhang Ning-Bo Yi Li-Yong Tian Chun-Ping Ma Yen Wei School of Textile Materials and Engineering Wuyi UniversityJiangmen529020China Department of Chemistry and the Tsinghua Center for Frontier Polymer Research Tsinghua UniversityBeijing100084China

A family of new triphenylmethane(TPM)-based polyimides(PIs)containing bulky tert-butyldimethylsiloxy(TBS)side-groups(PI-TPMOSis)has been prepared by a post-polymerization modification via a simple silyl ether reaction of TPM-based PIs containing hydroxyl(OH)groups(PI-TPMOHs).The attachment of TBS side-groups in PI-TPMOSis can be achieved up to 100%,as confirmed by the 1H-NMR and IR *** to the presence of the TPM structure,PI-TPMOSi films still display the excellent thermal stability with high glass transition temperature(Tg)of 314–351°C and high degradation temperature(Td5%)of 480–501°*** is quite remarkable that the introduction of TBS side-groups into PI-TPMOSi chains results in more superior optical,dielectric and solubility properties in comparison with the precursor PI-TPMOH films,probably due to the reductions of the packing density and charge-transfer complexes(CTCs)*** optical transmittance at 400 nm(T400)of PI-TPMOSi films is significantly increased from 45.3%–68.8%to 75.4%–81.6%of the precursor PI-TPMOH *** dielectric constant(Dk)and dissipation factor(Df)at 1 MHz of PI-TPMOSi films are reduced from 4.11–4.40 and 0.00159–0.00235 to 2.61–2.92 and 0.00125–0.00171 of the precursor PI-TPMOH films,*** the molecular design and simple preparation method,this study provides an effective approach for enhancement of various properties of PI films for microelectronic and photoelectric engineering applications.

关键词： Triphenylmethane-based polyimides post-polymerization modification High Tg High optical transparence Low Dk

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Progress in side-chain thiophene-containing polymers: synthesis, properties and applications

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Science China Chemistry 2015年第11期58卷 1641-1650页

作者： Yali Qiao Xiaodong Yin Chuanbing Tang Department of Chemistry and Biochemistry University of South Carolina

In contrast to conventional main-chain conjugated polymers, incorporation of electronically active conjugated oligomers into non-conjugated polymer backbones as pendant groups represents a promising alternative strategy to developing novel electroactive polymer materials that are desirable for potential applications in organic electronics. This review focuses on polymers with thiophene in the side chain and summarizes the most important synthetic approaches to these polymers, including direct controlled polymerization techniques(e.g., ATRP, ROMP, and RAFT) as well as post-polymerization modifications. Additionally, various properties and applications of these polymers are discussed.

关键词： non-conjugated polymer thiophene controlled polymerization post-polymerization modification organic electronics

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Yttrium-catalyzed cis-1,4-Selective polymerization of 2-(4-Halophenyl)-1,3-butadienes and Their Copolymerization with Isoprene

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Chinese Journal of Polymer Science 2021年第3期39卷 309-315,I0005页

作者： Jian-Ming Huang Chang-Guang Yao Shi-Hui Li Dong-Mei Cui State Key Loboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022Chino School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China

polymerization of 2-(4-halophenyl)-1,3-butadiene(2-XPB) and their copolymerization with isoprene using a yttrium catalyst have been examined. The β-diketiminato yttrium bis(alkyl) complex(1) activated by [Ph_3 C][B(C_(6) F_(5))_(4)] and Ali Bu3 shows high cis-1,4-selectivity(>98%) for the polymerization of 2-XPB(2-XPB = 2-FPB, 2-Cl PB and 2-Br PB) to afford halogenated plastic poly(dienes) with glass transition temperatures of30–55 ℃. Moreover, the copolymerization of 2-XPB with isoprene(IP) has also been achieved by this catalyst, and the insertion ratios of 2-XPB can be facilely tuned in a full range of 0%–100% simply by changing the 2-XPB-to-IP ratio. Quantitative hydrogenation of cis-1,4-poly(2-XPB) results in perfect alternating ethylene-halostyrene copolymers, and an alternating copolymer of 4-vinylbenzoic acid with ethylene is obtained by a consecutive reaction of ethylene-4-bromostyrene copolymer with ^(n)Bu Li, CO_(2) and HCl.

关键词： cis-1,4-Selective Coordination(co)polymerization Poly(dienes) Alternating copolymer post-polymerization modification

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Responsive hyperbranched poly(formyl-1,2,3-triazole)s toward quadruple-modal information security protection

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Science China Chemistry 2022年第4期65卷 771-777页

作者： Baixue Li Zhen Li Kai You Anjun Qin Ben Zhong Tang State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesCenter for Aggregation Induced EmissionSouth China University of TechnologyGuangzhou 510640China Shenzhen Institute of Molecular Aggregate Science and Engineering School of Science and EngineeringThe Chinese University of Hong KongShenzhen 518172China Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina School of Electromechanical Engineering Guangdong University of TechnologyGuangzhou 510006China Foshan Nanhai Guangdong Technology University CNC Equipment Cooperative Innovation Institute Foshan 528225China

Secrecy has received tremendous attention in modern information society. Innovative polymer-based fluorescent materials with multiple mode emission are quite desirable to achieve multistage data security. Herein, a series of soluble and thermally stable hyperbranched poly(formyl-1,2,3-triazole)s(hb-PFTAs) with high molecular weights were facilely prepared by catalyst-free polycycloaddition of aldehyde-activated internal triyne and diazides. Functional moieties of triphenylamine and binaphthyl could be incorporated into the polymers to offer them with unique fluorescence and circular dichroism properties, *** taking advantage of activated ethynyl and aldehyde groups on their peripheries and in the internal branch chains, the hbPFTAs can undergo efficient single-and double-stage post-functionalization. More importantly, based on the remarkable fluorescence responses to hydrazine and hydrochloric acid, the hyperbranched polymers are featured with triple-mode fluorescent patterns and have been applied in quadruple-modal information encryption and storage with enhanced security and density. Collectively, this work not only enriches the structural diversity of the existing triazole-based material library, but also provides new polymeric materials for data and information security application.

关键词： activated internal triyne hyperbranched poly(formyl-1,2,3-triazole)s post-polymerization modification multilevel information security

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Simplifying Molecular Complexity for the Synthesis of Polymer Materials

Simplifying Molecular Complexity for the Synthesis of Polyme...

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中国化学会2017全国高分子学术论文报告会

作者： Patrick Théato University of Hamburg Institute for Technical and Macromolecular Chemistry

The increasing complexity on the molecular level demands for highly advanced specialists possessing the skillset to synthesize such chemical structures. This clearly limits or slows down the advancement to new scientific areas. Hence, we have addressed this challenge over the years by developing simple synthetic routes, while maintaining a molecular complexity, thereby providing the synthetic tools to prepare highly functional polymer.

关键词： post-polymerization modification smart polymers hydrogel

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