On the rebound: Scientists revive search for new rubber sources

Gelling, Cristy

doi:10.1002/scin.5591840424

Cited by 9 publications

(10 citation statements)

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“…The 1 H‐NMR and 13 C‐NMR spectra confirmed the molecular structure of the CNR to be composed of isoprene, residual epoxy groups, and chloroacetate groups, which corresponds to the result analyzed from the FTIR measurement. The important peaks corresponding to the chloroacetate group showed at δ 1.31 ppm for CH 3 C, at δ 3.64 ppm for COH, and at δ 4.09 ppm for CH 2 Cl as analyzed by 1 H‐NMR [Figure (a)] and at δ 40.30 ppm (q) for CH 2 Cl and at δ 70.46 ppm (r) for COH as analyzed by 13 C‐NMR [Figure (b)].…”

Section: Resultssupporting

confidence: 72%

Influence of chloroacetate group on physical properties of natural rubber and its interaction with fillers

Boochathum

Rongtongaram

2015

J of Applied Polymer Sci

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Filler–rubber composites were prepared by mixing chloroacetated natural rubber (CNR) with silica, carbon black (CB), or calcium carbonate using a two‐roll mill. The interactions between the CNR and fillers, including silica, carbon black, and calcium carbonate, were characterized based on glass transition temperature (Tg) and shear storage modulus (G′). The results showed that both the Tg and G′ values of the CNR‐Si composite were found to be higher than those of the CNR–CB and CNR–CaCO3 composites, indicating the existence of the CNR and silica interaction. The outstanding direct interaction between the CNR rubber matrix and silica without using a coupling agent was believed to be due to hydrogen bonds that formed between the hydroxyls of the silanol groups of silica and the carbonyls in the chloroacetate groups of CNR molecules. Moreover, it was also found that silica dispersed and distributed in the CNR matrix much better than in the natural rubber matrix. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43076.

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Section: Resultssupporting

confidence: 72%

Influence of chloroacetate group on physical properties of natural rubber and its interaction with fillers

Boochathum

Rongtongaram

2015

J of Applied Polymer Sci

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“…Table c shows the thermal properties of EMNa/ENR25 blends; in these materials, T g of ENR25 is lower than the T g of ENR50 due to the lower epoxidation. It has been reported that for every mole percent increase in the epoxidation level, the T g increases by 0.93 °C; however, there is no significant variation in the T g of ENR25 phase at all compositions (Table c). It should be observed that also Tm of EMNa phase remains practically unvaried for any composition.…”

Section: Resultsmentioning

confidence: 89%

Role of Phase Morphology on the Damage Initiated Self‐healing Behavior of Ionomer Blends

Rahman

Spagnoli

Grande

et al. 2013

Macro Materials & Eng

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The development of self‐healing materials, based on polymer blends, is an important issue either from a scientific or a technological point of view. The application of such materials can be remarkably extended if healing effects can be maintained even in polymers that are modified in order to tune their physical and mechanical behavior. In this research the self‐healing behavior of blends made of ionomers (sodium and zinc salts of poly(ethyelene‐co‐methacrylic acid)—EMNa and EMZn) with functionalized elastomers (epoxidized natural rubber with different epoxidation levels—ENR50 and ENR25, polyisoprene—PISP) of different compositions is investigated. The role of processing conditions, phase morphology, functionalization level, polymers compatibility over self‐healing response are discussed. Rubber functionality and phase dispersion are recognized as crucial factors affecting the healing efficiency of blends. Results of ballistic tests, DSC thermal analysis, FTIR spectroscopy, optical and electron (SEM and TEM) microscopy observations, rheological and mechanical tests are presented as supporting evidences.

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“…Commercially produced ENRs that contain 25 and 50 mol % epoxy contents are assigned as ENR‐25 and ENR‐50, respectively . An increase in the level of epoxidation increases the density, solubility parameter, and glass‐transition temperature ( T g ) and decreases the refractive index and crystallinity . ENR containing epoxidized‐form opened ring structures shows excellent properties, including insolubility, air impermeability, oil and organic solvent resistant, a good wet grip, and high damping characteristics.…”

Section: Manufacturing Of Enrmentioning

confidence: 99%

Use of epoxidized natural rubber as a toughening agent in plastics

Tanjung

Hassan

Hasan

2015

J of Applied Polymer Sci

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At present, the rubber toughening of plastics has become an attractive field of study in polymer science and technology because brittleness is known to be a drawback in many engineering plastics; it can cause premature failure during application. Among existing rubber materials, epoxidized natural rubber (ENR) has been widely used as an impact modifier or toughening agent in a large number of engineering plastics; in particular, it enhances the impact strength, which deteriorates with the incorporation of other additives, such as fillers and flame retardants. ENR is a modification product from natural rubber produced via an epoxidation reaction. ENR also has good chemical resistance. In this review, we aim to provide a concise current status in the field of ENR toughening agents for plastics with a brief discussion of their associated problems and potential applications.

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On the rebound: Scientists revive search for new rubber sources

Cited by 9 publications

References 0 publications

Influence of chloroacetate group on physical properties of natural rubber and its interaction with fillers

Influence of chloroacetate group on physical properties of natural rubber and its interaction with fillers

Role of Phase Morphology on the Damage Initiated Self‐healing Behavior of Ionomer Blends

Use of epoxidized natural rubber as a toughening agent in plastics

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