Low-crosslinking multi-functionalization HVBR prepared in solvent free process by anionic grafted reaction

Hua, Jing; Li, Kai; Liu, Jinhui; Zhao, Xinling; Wang, Zhaobo

doi:10.1016/j.polymertesting.2018.01.033

Cited by 11 publications

(6 citation statements)

References 19 publications

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“…In comparison to unmodified HVBR, there appears two new absorption peaks at 850 cm −1 and 1260 cm −1 in the spectra of EHVBR, attributed to the asymmetric and symmetric C‐O‐C stretching vibration modes, respectively. Meanwhile, in the case of EHVBR, a new characteristic peak at 1740 cm −1 is observed, assigned to the carboxyl (C=O) bands from the epoxidation of epoxy groups . These results indicate that the epoxy groups are successfully introduced on HVBR molecular chains.…”

Section: Resultsmentioning

confidence: 80%

“…As illustrated from the 1 H‐NMR spectra of HVBR, there appears two characteristic absorption peaks at 4.9 and 5.4 ppm, which are assigned to the unsaturated protons of the double bonds of trans‐1,4‐butadiene structure (‐CH=CH‐) and side vinyl groups (‐CH=CH 2 ), respectively. However, it can be seen from the 1 H‐NMR spectra of EHVBR with epoxidation degree of 30 and 65% that the intensity of the two above‐mentioned absorption peaks becomes weak, and two new absorption peaks at 2.3 and 2.6 ppm are observed, attributed to the characteristic peaks of epoxy groups in trans‐1,4‐butadiene structure and side vinyl groups of EHVBR molecular chains . The epoxidation equation of HVBR can be inferred from the FTIR and 1 H‐NMR results as Scheme .…”

Section: Resultsmentioning

confidence: 99%

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Study on epoxy modification of HVBR and damping performance of EHVBR/hindered phenol hybrids

Zhao

et al. 2018

J of Applied Polymer Sci

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In this study, epoxidized high vinyl polybutadiene rubber (EHVBR) was prepared by the epoxidation reaction of high vinyl polybutadiene rubber (HVBR) in toluene using peroxyacetic acid as oxidant. The effects of reaction temperature and peroxyacetic acid concentration on the epoxidation degree of EHVBR were investigated by Fourier transform infrared (FTIR) spectroscopy and nuclear magnetic resonance (NMR), and the damping properties of organic hybrids consisting of EHVBR and different contents of hindered phenols tetrakis [methylene‐3‐(3‐5‐di‐tert‐butyl‐4‐hydroxyphenyl) propionyloxy] methane (AO‐60) and 3,9‐bis[1,1‐dimethyl‐2{β‐(3‐tert‐butyl‐4‐hydroxy‐5‐methylphenyl)propionyloxy} ethyl]‐2,4,8,10‐tetraoxaspiro[5,5]undecane (AO‐80) were explored by dynamic mechanical analysis (DMA). FTIR and NMR analyses indicated that the epoxidation occurred on the C=C double bonds of HVBR molecular chains and the epoxidation degree of EHVBR could be adjusted from 5 to 65% through control of the reaction temperature and peroxyacetic acid concentration. DMA and physical mechanical measurements indicated that the introduction of AO‐60 and AO‐80 could simultaneously improve the damping properties and mechanical properties of the EHVBR/AO‐60 and EHVBR/AO‐80 hybrids. The blending ratios of EHVBR/AO‐60 = 100/60 and EHVBR/AO‐80 = 100/60 showed better damping properties and the effective damping temperature ranges were extended from 13.1 to 52.3 °C and from 16.1 to 54 °C, respectively. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47196.

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Section: Resultsmentioning

confidence: 80%

Section: Resultsmentioning

confidence: 99%

Study on epoxy modification of HVBR and damping performance of EHVBR/hindered phenol hybrids

Zhao

et al. 2018

J of Applied Polymer Sci

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“…Currently reported approaches to the grafting of polar groups on HVBR molecular chains are primarily based on free-radical reactions [23][24][25][26] and anionic reactions. [27][28][29] However, both of these approaches unavoidably cause crosslinking of the molecular chains and the generation of a gel, which is detrimental to the practical application of the grafting polymer. Herein, we attempt to prepare a gel-free grafting polymer based on the olefin metathesis reaction.…”

Section: Introductionmentioning

confidence: 99%

Dynamic ionic behavior of gel-free diolefin rubber-based carboxylate ionomers preparedviaolefin metathesis

Wang

Liu²,

Liu

et al. 2022

Soft Matter

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“…Moreover, vinyl-rich side groups may endow HVBR molecular chains with higher activity for polar grafting modification. [28][29][30][31][32][33] In view of the above discussions and reported researches, we first employed HVBR as matrix to fabricate maleic anhydride (MAH) grafted HVBR (HVBR-g-MAH) with MAH as monomer and benzoyl peroxide (BPO) as initiator by free radical reaction, and then prepared HVBR-based dicarboxylate sodium ionomer (Na ionomer) through the complexation reaction between HVBR-g-MAH and sodium hydroxide (NaOH). In this study, effects of MAH monomer and initiator concentrations together with stirring speed, reaction time, reaction temperature, and styrene concentration on the amounts of grafting MAH onto molecular chains and gel content of HVBR-g-MAH were determined using the titration method and net hanging method, respectively.…”

Section: Introductionmentioning

confidence: 99%

Stable ion bond for high damping, high wet resistance, and low rolling resistance high vinyl polybutadiene rubber‐based dicarboxylate ionomer

Yuan

Wang

et al. 2020

J of Applied Polymer Sci

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Since the implementation of European Union (EU) tire label, the focus of recent attention has been focused on high performance green tire with low rolling resistance, high wet resistance, low noise, and excellent auto‐braking properties. However, it is a significant challenge to simultaneously achieve these performances for rubber materials. In this research, we developed a novel concept on the construction of stable ion bonds for high performance high vinyl polybutadiene rubber (HVBR)‐based dicarboxylate ionomers. HVBR‐based dicarboxylate sodium ionomer (hereafter referred as Na ionomer) was fabricated through complexation reaction of some or all of carboxylic functional groups on the preprepared maleinized HVBR molecular chains with sodium hydroxide. In the case of Na ionomers, the formation of sodium carboxylate group was certified from Fourier transform infrared spectra. Physical and dynamic mechanical measurements indicated that the tensile strength, wear resistance, wet skid resistance, dry sliding resistance, low rolling resistance, and low heat buildup of the Na ionomer were significantly improved compared to that of HVBR, and Na ionomer simultaneously showed better damping properties and the effective damping temperature range was broadened from −8.8 to 30.1°C, which was closer to the room temperature. Consequently, the approach and results collectively represent a significant advance toward the development of high performance green tire rubber materials.

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Low-crosslinking multi-functionalization HVBR prepared in solvent free process by anionic grafted reaction

Cited by 11 publications

References 19 publications

Study on epoxy modification of HVBR and damping performance of EHVBR/hindered phenol hybrids

Study on epoxy modification of HVBR and damping performance of EHVBR/hindered phenol hybrids

Dynamic ionic behavior of gel-free diolefin rubber-based carboxylate ionomers preparedviaolefin metathesis

Stable ion bond for high damping, high wet resistance, and low rolling resistance high vinyl polybutadiene rubber‐based dicarboxylate ionomer

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