A norbornene polymer brush for electro-optic applications

Jia, Yue; Spring, Andrew M.; Yu, Feng; Yamamoto, Kazuhiro; Aoki, Isao; Otomo, Akira; Yokoyama, Shiyoshi

doi:10.1016/j.tsf.2013.06.071

Cited by 12 publications

(3 citation statements)

References 19 publications

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“…As an expansion on this work, the possibilities to block extend the resulting polymer brushes and to produce diblock copolymers of disparate species were explored. Block copolymers can offer access to additional advanced materials through this synthetic method, which has potential to be combined with other polymerization methods to improve anti-fogging in polymer-brush-based optical materials. , …”

Section: Resultsmentioning

confidence: 99%

“…Block copolymers can offer access to additional advanced materials through this synthetic method, which has potential to be combined with other polymerization methods to improve antifogging in polymer-brush-based optical materials. 53,54 As mentioned above, polymer brush films synthesized via SI-PET-RAFT can be sequentially extended to produce thicker coatings with final film thicknesses of d > 100 nm. Figure 8a shows the results of a representative chain extension experiment, where a pMETAC brush film was reinitiated and extended nine times after initial growth.…”

Section: Chain Extension and Diblockmentioning

confidence: 99%

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Superhydrophilic Polymer Brushes with High Durability and Anti-fogging Activity

Fromel

Sweeder

Jang

et al. 2021

ACS Appl. Polym. Mater.

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Hydrophilic surface coatings have made it into commercial application as possible solutions for problems such as fogging, frosting, and biofouling. However, there is an inherent contradiction: superhydrophilic coatings can prevent these unwanted phenomena, but they are also readily dissolved by water. To address this longevity concern, the present work introduces a fully aqueous surface-initiated (SI) polymerization under ambient conditions for the facile formation of durable superhydrophilic polymer coatings. The aqueous SI photoinduced electron transfer reversible addition−fragmentation chain transfer polymerization (SI-PET-RAFT) approach developed herein uses water as a sole solvent and can be performed in an ambient air atmosphere. This circumvents traditional shortcomings in SI radical polymerization related to limited hydrophilic monomer solubility in organic solvents and oxygen tolerance. In addition, polymerization under mild yellow light eliminates possible substrate degradation that can occur with conventional thermal or UV-light treatment. The cationic, anionic, and zwitterionic polymer films engineered in this study show promise as functional materials with enhanced durability, demonstrated to effectively combat the challenge of surface fogging. The described approach is user-friendly, cost-and time-efficient, and scalable and produces efficient anti-fogging coatings that outperform commercial solutions in both optical quality and durability.

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Section: Resultsmentioning

confidence: 99%

Section: Chain Extension and Diblockmentioning

confidence: 99%

Superhydrophilic Polymer Brushes with High Durability and Anti-fogging Activity

Fromel

Sweeder

Jang

et al. 2021

ACS Appl. Polym. Mater.

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“…3 A small selection of these interesting applications include cell adhesion materials, membranes, insulating materials and various optics applications. [4][5][6][7][8][9] This breadth of applications can be attributed to the fact that, as a polymer class, poly(NDI)s have been demonstrated to exhibit favorable thermal and mechanical properties, which greatly extend their range of practical applications. [10][11][12][13][14] Furthermore, ring-opening metathesis polymerization allows the preparation of well-defined random, block and alternating copolymers that extend the utility of poly(NDI)s as a system to prepare reactive and functional polymers.…”

Section: Introductionmentioning

confidence: 99%

The preparation of well-controlled poly(N-cyclohexyl-exo-norbornene-5,6-dicarboximide) polymers

Spring

Qiu

et al. 2014

Polym J

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We have studied the ring-opening metathesis polymerization of N-cyclohexyl-exo-norbornene-5,6-dicarboximide using the following 4 initiators: Grubbs 1, Grubbs 2, Hoveyda-Grubbs 1 (HG1) and Hoveyda-Grubbs 2 (HG2). Only the Grubbs 1 initiator was able to precisely control the polymer molecular weight. Polymerizations initiated by the HG1, Grubbs 2 and HG2 initiators could not be controlled well. Both the Grubbs 1 and HG1 yielded polymers with a high trans % (85-98%), whereas Grubbs 2 and HG2 yielded polymers with a lower trans % (50-52%). The level of molecular weight control for the four initiators decreased in the order Grubbs 14HG14HG24Grubbs 2. We also demonstrated that, in the case of polymers produced using Grubbs 1, the refractive indices (RIs) of the polymers decreased in a linear and controllable fashion from 1.539 to 1.534 at 633 nm, as the molecular weight was increased from 6700 to 26 400. This change represented a decrease in the RI of 0.005. INTRODUCTIONThe academic interest in poly(N-exo-norbornene-5,6-dicarboximide) (poly(NDI)) polymers has recently increased substantially, and its applications span physics, 1 chemistry 2 and biology. 3 A small selection of these interesting applications include cell adhesion materials, membranes, insulating materials and various optics applications. [4][5][6][7][8][9] This breadth of applications can be attributed to the fact that, as a polymer class, poly(NDI)s have been demonstrated to exhibit favorable thermal and mechanical properties, which greatly extend their range of practical applications. 10-14 Furthermore, ring-opening metathesis polymerization allows the preparation of well-defined random, block and alternating copolymers that extend the utility of poly(NDI)s as a system to prepare reactive and functional polymers. 15,16 Therefore, a systematic study of the influence of the Grubbs initiator on the precise controllability of the molecular weight and stereochemistry of a standard NDI monomer is of practical utility. Monomer preparation for poly(NDI)s is simple and easy. 17 Tlenkopatchev and coworkers have studied poly(NDI)s in detail using the Grubbs 1 (G1) and Grubbs 2 (G2) initiators. 13,14,18,19 Such initiators are known to impart trans-cis conformations into the polymer backbone. In this study, we focused on the monomer N-cyclohexyl-exo-norbornene-5,6-dicarboximide (CyNDI (4)) (Scheme 1). This monomer and polymer are soluble in common organic solvents such as chloroform and tetrahydrofuran. Furthermore, the monomer CyNDI (4) is easy to prepare in large quantities. Currently, the four different initiators G1, G2, Hoveyda-Grubbs 1

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