Synthesizing radiation‐hard polymer and copolymers using<i>laccol</i>monomers extracted from lacquer tree<i>toxicodendron succedanea</i>via cationic polymerization

Arachchilage, Imalka H. A. M.; Patel, Milly K.; Harmon, Julie P.

doi:10.1002/pen.25159

Cited by 10 publications

(13 citation statements)

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“…Urushiol, which accounts to 60-70% of the raw lacquer collected from natural resource-rich Rhus vernicifera, is a catechol derivative with a linear alkenyl group. 24 In general, researches have shown that catechol structures can generate semiquinone radicals under the action of enzymes, 25 air, 26 and some inorganic one-electron oxidants (ferric chloride, silver nitrate, copper sulfate, etc. ), [27][28][29][30] and quinone radicals are oxidatively coupled with polyphenols and then form a biphenyl structure.…”

Section: Preparation Of Pul/agnpsmentioning

confidence: 99%

Facile one-pot synthesis of silver nanoparticles encapsulated in natural polymeric urushiol for marine antifouling

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Section: Preparation Of Pul/agnpsmentioning

confidence: 99%

Facile one-pot synthesis of silver nanoparticles encapsulated in natural polymeric urushiol for marine antifouling

et al. 2020

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“…Laccol extraction, laccol polymer preparation, and initiator preparation were carried out according to the procedures published in our previous article . High pure food grade d ‐limonene was used as received without further purification.…”

Section: Methodsmentioning

confidence: 99%

“…Due to the unsaturation of this C‐17 side chain, it is a potent candidate for cationic polymerization process. As described in our previously published article , laccol was successfully polymerized via cationic polymerization using AlCl 3 .EtOAc coinitiator. Further broadening the applicability of laccol in industrial environment, copolymerization of laccol with limonene via cationic polymerization was studied herein to develop radiation hard copolymers.…”

Section: Introductionmentioning

confidence: 99%

“…These hydroxyl groups can convert excitation energy into nonchemistry inducing energy to enhance the radiation resistivity of lacquer . In addition, enhancement of radiation hardness in nanotubes of organic polymer matrices and laccol polymer after gamma irradiation has shown by Harmon's group. Further, this is the first article documenting the synthesis of laccol:limonene copolymers which possess radiation hardening.…”

Section: Introductionmentioning

confidence: 99%

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Environmentally Friendly Radiation Hardd‐Limonene and Laccol Copolymers Synthesized via Cationic Copolymerization

Arachchilage

Patel

Basi

et al. 2019

Polymer Engineering & Sci

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In the modern world, petroleum‐based synthetic polymers have a great number of applications in fields ranging from food packaging to space travel. However, the processing of petroleum products and the resulting depletion of fossil fuels are major environmental concerns in today's society. As a result, the development of sustainable polymers which are made up of renewable resources and waste products is an immerging area of research. Considering the world food production, citrus fruit is most abundant and its contribution to waste generation is immense. Therefore, this study focuses on offering an alternative to the use of petroleum‐based polymers and also providing a regulatory pathway to manage citrus waste by developing novel copolymers of laccol and limonene. Two environmentally friendly compounds, laccol, derived from the sap of Toxicodendron succedaneum tree and limonene, extracted from orange peels, were copolymerized via cationic polymerization to generate d‐limonene:laccol copolymers with radiation hardening capabilities which is relevant in fields such as nuclear energy generation, medicinal sterilization, commercial irradiation, and space exploration. Formation of these copolymers was verified with infrared and nuclear magnetic resonance analysis. The synthesized copolymers were characterized using different methods and exposed to Co‐60 gamma radiation to identify alterations to their properties. POLYM. ENG. SCI., 60:607–618, 2020. © 2019 Society of Plastics Engineers

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“…Nowadays, NMR spectroscopy is one of the most important analytical tools that has been used in several fields. These fields include structural biology [29][30][31][32][33][34][35][36][37][38], organic chemistry [39][40][41][42][43][44][45][46][47][48][49][50][51][52], polymer characterization [40,46,[53][54][55][56][57][58][59][60][61][62][63][64], inorganic chemistry [65][66][67][68][69][70][71][72][73][74][75], and physics [76][77][...…”

mentioning

confidence: 99%

New Advances in Fast Methods of 2D NMR Experiments

Emwas¹,

Alghrably²,

Al-Harthi³

et al. 2020

Nuclear Magnetic Resonance

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Although nuclear magnetic resonance spectroscopy is a potent analytical tool for identification, quantification, and structural elucidation, it suffers from inherently low sensitivity limitations. This chapter focuses on recently reported methods that enable quick acquisition of NMR spectra, as well as new methods of faster, efficient, and informative two-dimensional (2D) NMR methods. Fast and efficient data acquisition has risen in response to an increasing need to investigate chemical and biological processes in real time. Several new techniques have been successfully introduced. One example of this is band-selective optimized-flip-angle shorttransient (SOFAST) NMR, which has opened the door to studying the kinetics of biological processes such as the phosphorylation of proteins. The fast recording of NMR spectra allows researchers to investigate time sensitive molecules that have limited stability under experimental conditions. The increasing awareness that molecular structures are dynamic, rather than static, has pushed some researchers to find alternatives to standard, time-consuming methods of 15 N relaxation observables acquisition.Keywords: NMR, 2D NMR, ultrafast data processing, SOFAST, relaxation 15 N, 29 Si, 30 Al, 31 P to 235 U). As the resonating frequency is unique for each type of nuclei, one can envision an NMR for each nucleus as a separate spectroscopy such as 1 H NMR spectroscopy, 13 C NMR spectroscopy, 235 U NMR spectroscopy (Figure 1), etc. More importantly, NMR has the ability to evaluate information about the environment of each atom and their neighbor's nuclei (both through space and through bond), allowing researchers to differentiate the unique magnetic environments of the same nuclei in different positions of a single molecule. Thus, NMR spectroscopy is extensively used for the identification and in the structural elucidation in a wide Nuclear Magnetic Resonance 2 range of applications in gas [2,3], liquid [4][5][6][7][8][9][10][11][12][13][14][15][16], and solid-state samples [17][18][19][20][21][22][23][24][25][26][27][28]. Nowadays, NMR spectroscopy is one of the most important analytical tools that has been used in several fields. These fields include structural biology [29][30][31][32][33][34][35][36][37][38], organic chemistry [39][40][41][42][43][44][45][46][47][48][49][50][51][52], polymer characterization [40,46,[53][54][55][56][57][58][59][60][61][62][63][64], inorganic chemistry [65][66][67][68][69][70][71][72][73][74][75], and physics [76][77][78][79][80][81][82][83].Despite its significant advantages, NMR suffers from some limitations, of which the relatively low sensitivity seems to be the most severe. An NMR sample can be treated as a collection of many nuclear spins of magnetically active nuclei that act as small bar magnets. These nuclear spins have two possible orientations with different energy levels that adapt when placed within the strong magnetic field. The number of nuclear spins occupying each energy level is determined by the Boltzmann distribution equation: N ...

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Synthesizing radiation‐hard polymer and copolymers usinglaccolmonomers extracted from lacquer treetoxicodendron succedaneavia cationic polymerization

Cited by 10 publications

References 41 publications

Facile one-pot synthesis of silver nanoparticles encapsulated in natural polymeric urushiol for marine antifouling

Facile one-pot synthesis of silver nanoparticles encapsulated in natural polymeric urushiol for marine antifouling

Environmentally Friendly Radiation Hardd‐Limonene and Laccol Copolymers Synthesized via Cationic Copolymerization

New Advances in Fast Methods of 2D NMR Experiments

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