• Title, Summary, Keyword: polybutadiene rubber

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Correlation between Physico-Mechanical and Rheological Properties of Rubber Compounds Based on NR-BR with C-C Gel Content in Polybutadiene (NR-BR 기반 고무소재에서 폴리부타디엔의 C-C 겔 함량과 물리기계적, 유변학적 특성 사이의 상호관계)

  • Ganjali, Saeed Taghvaei;Motiee, Fereshteh;Tabatabaie, Zohreh Ghazi
    • Polymer Korea
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    • v.38 no.4
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    • pp.425-433
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    • 2014
  • In this study, microstructure and gel content (C-C) of polybutadiene rubber (PBR) were investigated using various techniques including ASTM D 3616, attenuated total reflectance Fourier transform infrared spectrometry (ATR FTIR), differential scanning calorimetry (DSC) and nuclear magnetic resonance spectroscopy (NMR). The ATR FTIR spectra of the samples were investigated to determine the cis, trans, 1, 2-vinyl and the C-C gel content in PBR. The absorbance ratios of specific peaks in different grades of PBR were correlated with the C-C gel content measured by the ATR FTIR techniques. Physico-mechanical and rheological properties of rubber compounds based on BR with various amounts of gel were determined. The results showed that there is an acceptable correlation between these properties and the C-C gel content of PBR.

Investigations with respect to the electrochemical properties of carbon paste electrode fabricated using polybutadiene binder (폴리부타디엔 결합재를 이용하여 만든 탄소반죽전극의 전기화학적 특성에 관한 연구)

  • Yoon, Kil-Joong
    • Analytical Science and Technology
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    • v.20 no.1
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    • pp.49-54
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    • 2007
  • For the practical use as a biosensor, a rubber electrode bound by polybutadiene was newly devised for the determination of hydrogen peroxide. Then its electrochemical behaviors were investigated. The signal could be obtained at low electrode potential between 0.0 ~ -0.5 V (vs. Ag/AgCl) with a detection limit of $1.4{\times}10^{-4}M$ and its potential dependence was linear in the experimental range. Especially its Lineweaver-Burk plot showed a very good linearity giving the evidence of a good enzyme immobilization on the surface of the electrode. And mechanical stability of the electrode resulted from using rubber binder presented a new possibility for the practical use of biosensor.

Systematic studies on the properties of poly(lactic acid) (PLA)/liquid polybutadiene rubber (LPB) reactive blends

  • Lim, Sung-Wook;Choi, Myeon-Cheon;Jeong, Jae-Hoon;Park, Eun-Young;Ha, Chang-Sik
    • Advances in materials Research
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    • v.7 no.2
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    • pp.149-162
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    • 2018
  • Following our previous work, we have conducted further systematic studies to investigate the effects of reactive blending on the thermal and mechanical properties of blends of poly(lactic acid) (PLA) and a liquid rubber, polybutadiene (LPB). The toughened PLAs were prepared by melt-blending the PLA with various contents (0-9 wt.%) of the LPB in the absence or presence of dicumyl peroxide (DCP), a radical initiator. It was found that the rubber domains were homogeneously dispersed at the nanoscale in the PLA matrix up to 9 wt.% of LPB thanks to the reactive blending in the presence of DCP. Owing to the compatibilization of PLA with LPB through reactive blending, the elongation and toughness of PLA was enhanced, while the hydrolytic degradation of PLA was reduced.

Properties of Melamine Resins Mixed with Wood-Flour and Polybutadiene Rubber (목분 및 폴리부타디엔 고무를 혼합한 멜라민 수지의 물성)

  • Choi, Sang-Goo;Suh, Won-Dong;Park, In-Sook
    • Elastomers and Composites
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    • v.29 no.5
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    • pp.436-443
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    • 1994
  • Melamine resin was mixed with polybutadiene rubber or wood flour in the ranges of $5{\sim}75%(wt.%)$. For mixtures, physical and thermal properties were tested experimentally. Physical properties were mainly influenced on the dispersed states of rubber or wood flour. The highest flexural and impact strength were obtained at wood flour content $65{\times}67%$. Rubber was homopolymerized by hardner, or partially copolymerized with melamine resin. At rubber content $3{\sim}6%$, cured products represented lower modulus without decreasing mechanical strength.

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A Study on Physical Properties of Epoxy Adhesives Modified with Polybutadiene Rubber (Polybutadiene 고무 변성 에폭시 접착제의 물성에 관한 연구)

  • Hong, Suk-Pyo;Choi, Sang-Goo
    • Elastomers and Composites
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    • v.26 no.3
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    • pp.193-201
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    • 1991
  • Epoxy resin and CTBN(carboxyl terminated butadiene acrylonitrile) rubber were reacted at $150^{\circ}C$. Epoxy mixtures containing reactant in a ratio $0{\sim}75%(wt%)$ of total liquid component were with dicyandiamide(DICY) at $130{\sim}200^{\circ}C$. Cure, thermal and adhesive properties were investigated in relation to rubber content, cure temperature, hardner content and promoter content. $CTBN{\times}13$ showed better properties in miscibility, curing time and adhesive strength. 2PZ-CNS was more excellent in Tg, and melamine was in adhesive strength. Adhesive strength represented best at rubber content $12{\times}15%$.

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On the Pyrolysis of Polymers III. Identification of Gases from Rubber Pyrolysis by Gas Chromatography (高分子物質의 熱分解에 關한 硏究 (第3報) 合成고무類의 熱分解生成物의 Gas Chromatography에 의한 檢索과 合成고무 確認에의 利用)

  • Chwa-Kyung Sung
    • Journal of the Korean Chemical Society
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    • v.7 no.2
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    • pp.115-121
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    • 1963
  • Aliphatic hydrocarbon gases from rubber pyrolysis have been identified by gas chromatography with tetraethyleneglycol dimethylether column. Rubbers used in this work are polyisoprene, SBR, NBR, polybutadiene, buthyl rubber, polychloroprene and polyurethane rubber. The chromatogram is characteristic for each polymer. Author proposes a method of identification of synthetic rubbers by gas chromatograph of pyrolyzed gas. Sample is pyrolyzed at $450^{\circ}C$ under nitrogen or more effectively helium and gaseous portion, which eliminated liquid condensate, is passed to the column. The appearance of exclusively large peak of isoprene, isobutylene and carbon dioxide shows the presence of polyisoprene, polyisobutylene and polyurethane, respectively. Large peak of butadiene will appear in case of polybutadiene, SBR and NBR, but SBR can be identified through the styrene peak in gas chromatogram of liquid pyrolyzate and NBR can be identified by the evolution of hydrogen cyanide during pyrolysis. Polychloroprene is identified by the evolution of hydrogen chloride. This method could be applied to the identification of copolymer or polymer blend.

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Elucidation of the Vulcanization Structures of Filled cis-1,4-Polybutadiene Rubber by Solid State Carbon-13 NMR Spectroscopy (고체상태 NMR을 이용한 cis-1,4-polybutadiene 충진고무의 가황가교 구조 규명)

  • Kim, Su-Dong;Park, Eun-Kyung;Ryu, Ju-Whan
    • Elastomers and Composites
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    • v.43 no.4
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    • pp.281-287
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    • 2008
  • Using solid state $^{13}C$ NMR, polybutadiene rubber vulcanizates were qualitatively and quantitatively analyzed. In the filled conventional system of BR vulcanizate accelerated with TBBS, addition to the olefinic double bond and substitution in the $\alpha$ position to the double bond occurred simultaneously. Also the latter $\alpha$ substitution reaction was faster than the former addition reaction at initial reaction time. In addition, it was suggested that double bond-addition-polysulfide structures might be modified into 5-membered and 6-membered cyclic structures in overcure time. These chain modifications were correlated with the decrease in the chemical crosslink density in overcure time.

A study on the oxidation characteristics of Polybutadiene & Polyisoprene containing various types of antioxidants by DSC (산화방지제(酸化防止劑)를 배합(配合)한 Polybutadiene과 Polyisoprene의 DSC에 의(依)한 산화특성(酸化特性) 연구(硏究))

  • Yoo, Chong-Sun;Choi, Seoi-Young;Paik, Nam-Chul
    • Elastomers and Composites
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    • v.18 no.4
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    • pp.140-147
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    • 1983
  • The purpose of this dissertation is to increase oxidation resistance for Polybutadiene & Polyisoprene, and to investigate the energetics of inhibited oxidation of Polybutadiene & Polyisoprene stabilized with various types of antioxidants using DSC. The results of the study are as fellows: 1. In the DSC SCREEN for the onset temperature of oxidation, Polybutadiene was faster than Polyisoprene for the samples containing no antioxidant in air. 2. In the DSC evaluation for Polybutadiene, Recipe BG-4 with 2.0phr compounds of antioxidant was the best effective, and Recipe BS-4 with 2.0phr compounds of antioxidant was the worst effective, and the degrees of effect of antioxidant were exhibited in the ranking of G-1, D, BHT, and SP, roughly. 3. In the DSC evaluation for the Polyisoprene, Recipe IG-4 with 2.0phr compounds of antioxidant was the best effective, and Recipe ID-4 with 2.0phr compounds of antioxidant was the worst effective, and the degrees of effect of antioxidant were exhibited in the ranking of G-1, SP, BHT, and D roughly. 4. In the study on enthalpy which depends on exothermal reaction, the enthalpy of Polyisoprene was gloater than that of Polybutadiene. However, the problem was not solved completely, and it needs further studies.

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