Grafting modification of epoxidized natural rubber with poly(ethylene glycol) monomethylether carboxylic acid and ionic conductivity of graft polymer composite electrolytes

Wang, Ran; Mei, Hua; Ren, Wei; Zhang, Yong

doi:10.1039/c6ra17129j

Cited by 22 publications

(16 citation statements)

References 32 publications

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“…After acid hydrolysis to open the epoxy ring, the T g of ENR‐OH shifted to a lower temperature (−25 and − 23 °C for ENR8‐OH and ENR18‐OH, respectively). For the ENR grafted with mPEG‐COOH, the OCH 2 CH 2 O units contributed to flexible segments and decreased the T g . Comparing the mobility of ENR50 and ENR‐OH, ENR50 consisting of epoxy rings that obstructed the chain mobility.…”

Section: Resultsmentioning

confidence: 99%

Modification of epoxidized natural rubber as a PLA toughening agent

Sathornluck

Choochottiros

2019

J of Applied Polymer Sci

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In the present study, the modification of epoxidized natural rubber (ENR) was investigated to improve toughness of PLA. ENR‐PLA copolymers were synthesized by 2 steps reactions. Acid hydrolysis of ENR to prepare macroinitiator (ENR‐OH) and copolymerization with lactide to obtain ENR‐PLA copolymers. The reaction time of acid hydrolysis and the lactide monomer loading was investigated. The optimum conditions were 8 h acid hydrolysis with 5wt% lactide loading to obtain ENR8‐PLA5 copolymers. A series of samples of PLA blended with ENR‐PLA copolymers was prepared using melt‐blending. The blend of PLA with ENR8‐PLA5 copolymers at 1 phr substantially improved the tensile properties. The elongation at break was increased 67%, and toughness was increased 64% compared to neat PLA. These results indicate that ENR8‐PLA5 has potential as toughening agent for PLA. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48267.

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Section: Resultsmentioning

confidence: 99%

Modification of epoxidized natural rubber as a PLA toughening agent

Sathornluck

Choochottiros

2019

J of Applied Polymer Sci

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“…δ 1 and δ 2 express the solubility parameter of the solvent and the polymer, respectively. However, the swelling rate was determined as in Equation (6) [ 35 ] S w = w g − w 0 / w 0 where w 0 and w g are the weight of the dry and swollen samples, respectively.…”

Section: Methodsmentioning

confidence: 99%

Free-Radical Photopolymerization of Acrylonitrile Grafted onto Epoxidized Natural Rubber

et al. 2021

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The exploitation of epoxidized natural rubber (ENR) in electrochemical applications is approaching its limits because of its poor thermo-mechanical properties. These properties could be improved by chemical and/or physical modification, including grafting and/or crosslinking techniques. In this work, acrylonitrile (ACN) has been successfully grafted onto ENR- 25 by a radical photopolymerization technique. The effect of (ACN to ENR) mole ratios on chemical structure and interaction, thermo-mechanical behaviour and that related to the viscoelastic properties of the polymer was investigated. The existence of the –C≡N functional group at the end-product of ACN-g-ENR is confirmed by infrared (FT-IR) and nuclear magnetic resonance (NMR) analyses. An enhanced grafting efficiency (~57 %) was obtained after ACN was grafted onto the isoprene unit of ENR- 25 and showing a significant improvement in thermal stability and dielectric properties. The viscoelastic behaviour of the sample analysis showed an increase of storage modulus up to 150 × 103 MPa and the temperature of glass transition (Tg) was between −40 and 10 °C. The loss modulus, relaxation process, and tan delta were also described. Overall, the ACN-g-ENR shows a distinctive improvement in characteristics compared to ENR and can be widely used in many applications where natural rubber is used but improved thermal and mechanical properties are required. Likewise, it may also be used in electronic applications, for example, as a polymer electrolyte in batteries or supercapacitor.

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“…Many polymers have been studied and reported in polymer electrolytes like poly (ethylene oxide) PEO [6][7][8], poly (acrylonitrile) (PAN) [9][10], poly (vinylidenefluoride) (PVDF)[11-13], Biodegradable natural polymers such as chitosan [14][15][16], starch [17][18], cellulose [19][20], and natural rubber [21][22][23] have also been extensively studied.…”

Section: Introductionmentioning

confidence: 99%

Potassium Hydroxide Doped With (Poly(Methyl Methacrylate) (PMMA) Polymer as Electrolyte for Electrolytic Double layer Supercapacitor (EDLC) Application

Zakariya’u¹,

Sifawa²

2022

CaJoST

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The prime objective of the present paper is to develop polymer electrolyte doped with salt. A solution cast technique was adopted to develop a solid polymer electrolyte of polymer (Poly (methyl methacrylate) (PMMA) as host polymer and salt potassium hydroxide, KOH as dopant. Incorporation of salt increases the amophosity and homogeneity, decreases the surface roughness. Moreover, doping of salt (KOH) increases the overall conductivity of polymer electrolyte film. Electrochemical impedance spectroscopy (EIS) reveals the enhancement in conductivity (4 orders of magnitude) by salt doping. FTIR shows the complexation and composite nature of films. Polarized optical microscopy (POM) shows reduction in crystallinity which is further confirmed by Differential scanning calorimetry (DSC). Fabricated electrochemical double-layer supercapacitor using maximum conducting polymer salt electrolyte and symmetric carbon nanotubes electrodes shows specific capacitance of 21.86. Keywords: Polymer electrolyte; conductivity; DSC; FTIR

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Grafting modification of epoxidized natural rubber with poly(ethylene glycol) monomethylether carboxylic acid and ionic conductivity of graft polymer composite electrolytes

Abstract: A novel polymer was synthesized via a grafting reaction of epoxidized natural rubber (ENR) with poly(ethylene glycol) monomethylether carboxylic acid (mPEG-COOH), which can improve the conductivity as a matrix of CPE.

Cited by 22 publications

References 32 publications

Modification of epoxidized natural rubber as a PLA toughening agent

Modification of epoxidized natural rubber as a PLA toughening agent

Free-Radical Photopolymerization of Acrylonitrile Grafted onto Epoxidized Natural Rubber

Potassium Hydroxide Doped With (Poly(Methyl Methacrylate) (PMMA) Polymer as Electrolyte for Electrolytic Double layer Supercapacitor (EDLC) Application

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