Relevant bibliographies by topics / Hypercrosslinking

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Academic literature on the topic 'Hypercrosslinking'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 February 2022

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Journal articles on the topic "Hypercrosslinking"

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Koler, Amadeja, Mitja Kolar, Karel Jeřábek, and Peter Krajnc. "Influence of Functional Group Concentration on Hypercrosslinking of Poly(vinylbenzyl chloride) PolyHIPEs: Upgrading Macroporosity with Nanoporosity." Polymers 13, no. 16 (August 14, 2021): 2721. http://dx.doi.org/10.3390/polym13162721.

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With the aim to study the influence of monomer ratio in poly(high internal phase emulsions) (polyHIPEs) on the polymer network architecture and morphology of poly(vinylbenzyl chloride-co-divinylbenzene-co-styrene) after hypercrosslinking via the internal Friedel–Crafts process, polyHIPEs with 80% overall porosity were prepared at three different initial crosslinking degrees, namely 2, 5, and 10 mol.%. All had typical interconnected cellular morphology, which was not affected by the hypercrosslinking process. Nitrogen adsorption and desorption experiments with BET and t-plot modelling were used for the evaluation of the newly introduced nanoporosity and in combination with elemental analysis for the evaluation of the extent of the hypercrosslinking. It was found that, for all three initial crosslinking degrees, the minimum amount of functional monomer, 4-vinylbenzyl chloride, was approximately 30 mol.%. Hypercrosslinking of polymers with lower concentrations of functional monomer did not result in induction of nanoporosity while the initial crosslinking degree had a much lower impact on the formation of nanoporosity.
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Abdullah, Norhayati, and Peter A. G. Cormack. "Non-Aqueous Dispersion (NAD) Polymerisation-Based Synthetic Route to Hypercrosslinked Polymer: Effect of Reaction Temperature and Solvent System on Specific Surface Area." Advanced Materials Research 1134 (December 2015): 198–202. http://dx.doi.org/10.4028/www.scientific.net/amr.1134.198.

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Hypercrosslinked polymer microspheres with high specific surface areas were prepared successfully by exposing reactive, gel-type polymer precursors to a Friedel-Crafts catalyst. The lightly crosslinked gel-type polymer precursors were synthesised by non-aqueous dispersion (NAD) polymerisation in microsphere form, and were used subsequently in hypercrosslinking reactions. Extensive microporosity was generated in the products, leading to remarkably high inner specific surface areas of up to ~1,500 m2/g. SEM and BET spectroscopy were used to monitor the course of the hypercrosslinking reactions.
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Chen, Luyi, Yeru Liang, Hao Liu, Weicong Mai, Zhiyong Lin, Hongji Xu, Ruowen Fu, and Dingcai Wu. "Fabrication and electrochemical performance of novel hollow microporous carbon nanospheres." RSC Advances 6, no. 55 (2016): 49661–67. http://dx.doi.org/10.1039/c6ra04658d.

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Xu, Hongji, Jinlun Wu, Bingna Zheng, Weicong Mai, Fei Xu, Luyi Chen, Hao Liu, Ruowen Fu, Dingcai Wu, and Krzysztof Matyjaszewski. "A hypercrosslinking-induced self-assembly strategy for preparation of advanced hierarchical porous polymers with customizable functional components." Chemical Communications 53, no. 38 (2017): 5294–97. http://dx.doi.org/10.1039/c7cc01417a.

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Suo, Xian, Ling Xia, Qiwei Yang, Zhiguo Zhang, Zongbi Bao, Qilong Ren, Yiwen Yang, and Huabin Xing. "Synthesis of anion-functionalized mesoporous poly(ionic liquid)s via a microphase separation-hypercrosslinking strategy: highly efficient adsorbents for bioactive molecules." Journal of Materials Chemistry A 5, no. 27 (2017): 14114–23. http://dx.doi.org/10.1039/c7ta01986f.

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New anion-functionalized mesoporous poly(ionic liquid)s were synthesizedviaa microphase separation-hypercrosslinking strategy, and were utilized as highly efficient adsorbents for bioactive molecules.
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Mai, Weicong, Yuan Zuo, Chuanfa Li, Jinlun Wu, Kunyi Leng, Xingcai Zhang, Ruliang Liu, Ruowen Fu, and Dingcai Wu. "Functional nanonetwork-structured polymers with inbuilt poly(acrylic acid) linings for enhanced adsorption." Polymer Chemistry 8, no. 33 (2017): 4771–75. http://dx.doi.org/10.1039/c7py01032j.

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Functional nanonetwork-structured polymers with inbuilt poly(acrylic acid) linings for enhanced adsorption toward basic dyes and heavy metal ions were fabricated based on the union of SI-ATRP and hypercrosslinking.
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Veverka, Pavel, and Karel Jeřábek. "Mechanism of hypercrosslinking of chloromethylated styrene–divinylbenzene copolymers." Reactive and Functional Polymers 41, no. 1-3 (July 1999): 21–25. http://dx.doi.org/10.1016/s1381-5148(99)00030-9.

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Shaipulizan, Nur Syafiqah, Siti Nurul Ain Md Jamil, Sazlinda Kamaruzaman, Nur Nida Syamimi Subri, Abel Adekanmi Adeyi, Abdul Halim Abdullah, and Luqman Chuah Abdullah. "Preparation of Ethylene Glycol Dimethacrylate (EGDMA)-Based Terpolymer as Potential Sorbents for Pharmaceuticals Adsorption." Polymers 12, no. 2 (February 12, 2020): 423. http://dx.doi.org/10.3390/polym12020423.

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Ethylene glycol dimethacrylate (EGDMA) is used as a crosslinker in poly(acrylonitrile (AN)-co-vinylbenzyl chloride (VBC)) to investigate the effect of long-chain crosslinker to the porosity of the terpolymer system. Poly(AN-co-EGDMA-co-VBC) is synthesized by using precipitation polymerization method and further hypercrosslinked by Friedel-Crafts reaction. FT-IR spectra of poly(AN-co-EGDMA-co-VBC) show that the absorption bands at ~1290 cm−1 that are assigned to the C–Cl vibrations are almost disappeared in hypercrosslinked (HXL) poly(AN-co-EGDMA-co-VBC) polymers, confirming that the hypercrosslinking reaction is successful. SEM images show that the morphologies of the polymers are retained through the hypercrosslinking reactions. Brunauer–Emmett–Teller (BET) analysis shows that hypercrosslinked polymers had a specific surface area up to 59 m2·g−1. The preliminary performance of the terpolymer adsorbent to capture polar analyte is evaluated by adsorbing salicylic acid and mefenamic acid from aqueous solution in a batch system. The maximum adsorption capacity of salicylic acid and mefenamic acid were up to 416.7 mg·g−1 and 625 mg·g−1, respectively, and the adsorption kinetic data obeyed pseudo-second-order rate equation.
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Veverka, Pavel, and Karel Jeřábek. "Influence of hypercrosslinking on adsorption and absorption on or in styrenic polymers." Reactive and Functional Polymers 59, no. 1 (April 2004): 71–79. http://dx.doi.org/10.1016/j.reactfunctpolym.2003.12.008.

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Koler, Amadeja, Irena Pulko, and Peter Krajnc. "Post Polymerisation Hypercrosslinking with Emulsion Templating for Hierarchical and Multi-Level Porous Polymers." Acta Chimica Slovenica 67, no. 2 (June 15, 2020): 349–60. http://dx.doi.org/10.17344/acsi.2020.5901.

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Dissertations / Theses on the topic "Hypercrosslinking"

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Šálek, Petr. "Příprava a charakterizace magnetických nosičů z hypersíťovaných polystyrenových mikročástic a jejich použití v biosenzoru." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2012. http://www.nusl.cz/ntk/nusl-233348.

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With the aim to develop and characterize a functionalized highly magnetic polymer carrier of micrometer size and of a narrow particle size distribution that will be suitable for biological application, hypercrosslinked microspheres were prepared. Simultaneously, the relation between structure and properties of product was observed. Condition of dispersion polymerization were optimized to obtain starting monodisperse poly(styrene-co-divinylbenzene) [P(St-DVB)] microspheres. The P(St-DVB) microspheres of different degree of crosslinking were prepared and effect of some polymerization parameters such as type of solvent, initiator, concentration and mode of DVB addition on morphology, size and particle size distribution were investigated. The starting microspheres were hypercrosslinked to obtain microporous inner structure. Hyperosslinked particles had very large specific surface area (> 1000 m2/g) and a high content of micropores (ca. 0.6 ml/g). First, P(St-DVB) microspheres were chloromethylated using three different chloromethylation agents to regulate their porous properties. Hypercrosslinking was achieved by the addition of stannic chloride as a catalyst and by increasing a temperature. The hypercrosslinked microspheres were then functionalized with sulfo- or aminogroups. The functional groups captured precipitated iron oxide inside the porous structure of the microspheres and also served as a reactive site for intended immobilization of the protein. A solution of ferrous and ferric chloride was imbibed under vacuum into the porous structure and the iron oxide was precipitated by an aqueous ammonia solution. Finally, the magnetic functionalized hypercrosslinked micropsheres were integrated into a biosensor for qualitative detection of ovalbumin.
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