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Journal articles on the topic 'Hypercrosslinking'

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

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1

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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2

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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3

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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4

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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5

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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6

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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7

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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8

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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9

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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10

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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11

Mezhoud, Sarra, Muzafera Paljevac, Amadeja Koler, Benjamin Le Droumaguet, Daniel Grande, and Peter Krajnc. "Novel hypercrosslinking approach toward high surface area functional 2-hydroxyethyl methacrylate-based polyHIPEs." Reactive and Functional Polymers 132 (November 2018): 51–59. http://dx.doi.org/10.1016/j.reactfunctpolym.2018.09.009.

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12

Sevšek, Urška, Jiří Brus, Karel Jeřabek, and Peter Krajnc. "Post polymerisation hypercrosslinking of styrene/divinylbenzene poly(HIPE)s: Creating micropores within macroporous polymer." Polymer 55, no. 1 (January 2014): 410–15. http://dx.doi.org/10.1016/j.polymer.2013.09.026.

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13

Urban, Jiří, and Veronika Škeříková. "Effect of hypercrosslinking conditions on pore size distribution and efficiency of monolithic stationary phases." Journal of Separation Science 37, no. 21 (September 11, 2014): 3082–89. http://dx.doi.org/10.1002/jssc.201400730.

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14

Tang, Wenjie, Yue Wu, Anhou Xu, Tingting Gao, Yingqing Wei, and Guowei Zhou. "Hybrid porous hypercrosslinking polyanilines: facile Friedel–Crafts preparation, CO2 capture and Cr(VI) removal properties." Journal of Porous Materials 26, no. 5 (March 28, 2019): 1495–505. http://dx.doi.org/10.1007/s10934-019-00747-5.

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15

Pulko, Irena, Jennifer Wall, Peter Krajnc, and Neil R Cameron. "Ultra-High Surface Area Functional Porous Polymers by Emulsion Templating and Hypercrosslinking: Efficient Nucleophilic Catalyst Supports." Chemistry - A European Journal 16, no. 8 (February 22, 2010): 2350–54. http://dx.doi.org/10.1002/chem.200903043.

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16

Li, Zhenghui, Dingcai Wu, Xin Huang, Junhao Ma, Hao Liu, Yeru Liang, Ruowen Fu, and Krzysztof Matyjaszewski. "Fabrication of novel polymeric and carbonaceous nanoscale networks by the union of self-assembly and hypercrosslinking." Energy & Environmental Science 7, no. 9 (June 12, 2014): 3006. http://dx.doi.org/10.1039/c4ee00941j.

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17

Boatman, Elizabeth M., Mark B. Goodwin, Hoi-Ying Holman, Sirine Fakra, Mary H. Schweitzer, Ronald Gronsky, and John R. Horner. "Synchrotron Chemical and Structural Analysis of Tyrannosaurus rex Blood Vessels: The Contribution of Collagen Hypercrosslinking to Tissue Longevity." Microscopy and Microanalysis 20, S3 (August 2014): 1430–31. http://dx.doi.org/10.1017/s1431927614008885.

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18

Maya, Fernando, and Frantisek Svec. "Porous polymer monoliths with large surface area and functional groups prepared via copolymerization of protected functional monomers and hypercrosslinking." Journal of Chromatography A 1317 (November 2013): 32–38. http://dx.doi.org/10.1016/j.chroma.2013.07.073.

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19

Urban, Jiri, Frantisek Svec, and Jean M. J. Fréchet. "Hypercrosslinking: New approach to porous polymer monolithic capillary columns with large surface area for the highly efficient separation of small molecules." Journal of Chromatography A 1217, no. 52 (December 2010): 8212–21. http://dx.doi.org/10.1016/j.chroma.2010.10.100.

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20

Pan, Jianming, Heping Gao, Yunlei Zhang, Jun Zeng, Weidong Shi, Changhua Song, Yongsheng Yan, Longbao Yu, and Dandan Chang. "Porous solid acid with high Surface area derived from emulsion templating and hypercrosslinking for efficient one-pot conversion of cellulose to 5-hydroxymethylfurfural." RSC Adv. 4, no. 103 (2014): 59175–84. http://dx.doi.org/10.1039/c4ra10383a.

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21

Abdullah, Norhayati, Rabiatul A. Mahmod, Rohayu Jusoh, Mohammad Dalour Hossent Beg, and Muhammad Remanul Islam. "Effects of chemical modification on the performance evaluation of photoinitiated, dispersion-polymerized poly(methyl methacrylate-co-ethylene glycol dimethacrylate-co-vinylbenzyl chloride) microsphere." Polymers and Polymer Composites, April 15, 2020, 096739112091786. http://dx.doi.org/10.1177/0967391120917864.

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Poly(methyl methacrylate- co-ethylene glycol dimethacrylate- co-vinylbenzyl chloride) microsphere was prepared by dispersion polymerization, initiated by light using water/ethanol mixture. The sulfonated hypercrosslinked (HXL) polymer resin was synthesized via three stages, namely, precursor synthesis (photoinitiated dispersion polymerization), post-polymerization after hypercrosslinking reaction, and post-polymerization before hypercrosslinking reaction. The optimized precursor was functionalized before the hypercrosslinking reaction to investigate its ion-exchange capacity, specific surface area (SSA), morphology, and thermal stability. Post-polymerization after hypercrosslinking reaction showed that the chlorine content and SSA are higher than post-polymerization before hypercrosslinking reaction. HXL reaction took place using Friedel–Crafts alkylation with the aid of FeCl3 catalyst. Lewis acid (FeCl3) also played a significant role which contributed to high SSA of the HXL polymer. The particles produced from photoinitiated dispersion polymerization have advantages and could be used in solid-phase extraction, drug delivery, and high-performance liquid chromatography.
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22

Wijaya, Ulfia. "Synthesis of Mesoporous Carbons Derived from Hypercrosslinking of Divinylbenzene – 4-Vinylbenzyl Chloride Resin." IPTEK The Journal for Technology and Science 18, no. 4 (November 30, 2007). http://dx.doi.org/10.12962/j20882033.v18i4.165.

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