• Title, Summary, Keyword: 카본블랙

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미국의 카본 블랙 시장 분석

  • Yurcick P.A
    • The tire
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    • pp.21-29
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    • 1981
  • 현재 미국에서는 카본블랙 시장에 영향을 주는 많은 변화가 일어나고 있다. 즉, 카본블랙의 원료유 가격인상, 종류별 사용량의 변화, 가격인상 압력 등, 이 모든 요인들이 앞으로의 카본블랙 공업의 방향을 결정하게 될 것이다.

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Effects of Surface-modification of Carbon Black on the Characteristics of Polymerized Toner (카본블랙의 표면개질이 중합토너의 특성에 미치는 영향)

  • Lee, Eun Ho;Kim, Dae Su
    • Korean Chemical Engineering Research
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    • v.51 no.5
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    • pp.628-633
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    • 2013
  • Carbon black was surface-modified to prepare styrene-based suspension polymerized toner with excellent carbon black dispersibility inside toner particles. Carbon black was oxidized first to introduce hydroxyl groups on the surfaces, then esterification between the hydroxyl groups and carboxyl groups of organic acids (oleic acid, palmitic acid, acrylic acid) was followed to obtain organically surface-modified carbon black. The surface-modification of carbon black was confirmed by FTIR. Apparent carbon black dispersibility in the monomer mixture of the binder resin was tested and the particle size of dispersed carbon black was measured by particle size analyzer. Optical micrographs showed that carbon black dispersibility inside toner particles was improved considerably when the carbon black surfacemodified with oleic acid was used. The polymerized toner prepared with the carbon black surface-modified with oleic acid showed ideal particle size and size distribution as a toner.

Crosslink and Entanglement Moduli of Carbon Black Filled Network Rubbers Prepared by Different Curing Agents (상이한 가교제로 조성된 카본블랙 충진 망상 고무의 가교 탄성율과 엉킴 탄성율)

  • 김광만
    • The Korean Journal of Rheology
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    • v.7 no.3
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    • pp.225-236
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    • 1995
  • 세가지 가교제 즉 황, tetramethyltyiuram disulfide (TMTD) 및 dicumyl peroxide(DCP)로 각각 가교시킨 카본블랙 충진 고분자 망상 시료들에 대해 일축연신 실험 을 통해 얻은 Mooney plot를 분석, 가교 탄성율 Gc와 엉킴 탄성율 Ge를 각각 구하였다. 각 가교계에 대하여 Gc를 통해서는 가교 사슬간의 평균분자량, 망상사슬과 카본블랙간 결합체 의 밀도 및 평균 면적 등을 Gc를 통해서는 카본블랙 첨가에 따른 관경비를 각각평가하였다. 황 가교제의 경우 Gc가 가장 높았으며 망상 사슬과 카본블랙간의 결합이 가장 잘 이루어졌 다. TMTD와 DCP가교제의 경우는 황의경우보다 카보블랙 입자와의 결합력은 낮았으나 결 합체들의 분포는 더욱 조밀하게 나타났다. 또한 Ge평가로부터는 TMTD 가교계가 카본블랙 충진에 의해 관경이 가장크게 증가함을 알수 있었다.

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Crack and Cutting Resistance Properties of Natural Rubber(NR) Compounds with Silica/Carbon Black Dual Phase Filler (Silica/Carbon Black이 충전된 NR 가황물의 내Crack 및 내Cutting 특성)

  • Son, Woo-Jung;Cho, Ur-Ryung;Kim, Won-Ho
    • Elastomers and Composites
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    • v.37 no.2
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    • pp.86-98
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    • 2002
  • The application of silica/carbon black dual phase fillers to natural rubber(NR) compound was investigated. When the amounts of filler content were restricted to 60phr, the optimum ratio of dual phase fillers were 25phr/35phr of silica/carbon black. It was found that these new fillers give better overall performance in comparison with carbon black in tear strength, crack resistance, and cutting resistance. Also the thermal degradation resistance of NR vulcanizates which were filled with dual phase fillers was better than that of the carbon black. Dual phase fillers filled NR vulcanizates showed better viscoelastic properties, like tan${\delta}$, for the wet skid resistance and rolling resistance of motor vehicle tires.

Effect of Acid-Base Characteristics of Carbon Black Surfaces on Mechanical Behaviors of EPDM Matrix Composites (카본블랙 표면의 산-염기 특성변화가 카본블랙/EPDM 복합재료의 기계적 특성에 미치는 영향)

  • Park Soo-Jin;Kang Jin-Young;Hong Sung-Kwon
    • Polymer Korea
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    • v.29 no.2
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    • pp.151-155
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    • 2005
  • The effect of acid-base treatments of carbon blacks (CBs) was investigated in the mechanical properties of CBs/rubber composites. The surface characteristics of the CBs were determined by the pH, acid-base values, and surface energetics. Their mechanical properties of the composites were also evaluated by the crosslink density $(V_e)$ and tearing energy (T). As an experimental result, acidically treated CBs led to the increase of the specific component $({\gamma}s^{sp})$, resulting in decreasing the mechanical properties of the composites. However, basically treated CBs showed a higher value of the dispersive component $({\gamma}s^L)$ than that of the untreated or acidically treated CBs. It was also found that the interaction of the CBs-rubber was improved, resulting in the improvement of the crosslink density and mechanical properties of the composites. It was then remarked that the acid-base characteristics of the CB surfaces made an important role in improving the physical properties of the rubber matrix composites.

Conductive Carbon Block filled Composite(I): The Effect of Carbon Block on the Conductivity (전도성 카본블랙이 충전된 도전성 고분자 복합재료(I): 카본블랙이 전기전도성에 미치는 영향)

  • Kim, Jin-Kuk
    • Elastomers and Composites
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    • v.33 no.5
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    • pp.355-362
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    • 1998
  • The purpose of this paper is to develop a rational engineering conductive carbon filled composite through understanding of the effect of conductive carbon black. Polycabonate(PC), Acrylonitrile Butadiene Styrene copolymer(ABS) and PC/ABS resin were used as matrix of the conductive polymer composites. From the experimental results, PC filled with the fiber shaped carbon black showed a possibility to be a rational engineering conductive composite.

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Effect of Dispersant Contents on the Dispersity of Conductive Carbon-black and Properties of Screen-printed Source-drain Electrodes for OTFTs (분산제 함량에 따른 전도성 카본블랙의 분산 특성 및 스크린 인쇄된 OTFTs용 소스-드레인 전극 물성)

  • Lee, Mi-Young;Bae, Kyung-Eun;Kim, Seong-Hyun;Lim, Sang-Chul;Nam, Su-Yong
    • Polymer Korea
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    • v.33 no.5
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    • pp.397-406
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    • 2009
  • We have fabricated source-drain electrodes for OTFTs using a screen-printing technique with carbon-black pastes as conductive paste. And effects of dispersants contents (SOP 10-40%) on the dispersity of carbon-black pastes and characteristics of screen-printed source-drain electrodes for OTFTs using two types of dispersants (DB-2150, DB-9077) were investigated. As contents of both dispersants were increased the dispersity of carbon-black mill-bases was improved, whereas the carbon-black pastes exhibited different dispersion characteristics. For the case of DB-2150, the dispersity of the pastes was improved with increasing dispersant content and the storage modulus G' in their rheology characteristics were reduced. But, for the DB-9077, the storage modulus G' of pastes were increased with dispersant content due to the flocculated network structure formed by interactions among carbon-black powders and dispersants. But, since this flocculated network structure of the pastes using DB-9077 resulted in the conduction path of carbon-black structures, the conductivities of screen-printed electrodes and mobilities of the OTFTs with them were better than those using pastes with DB-2150.

Filler-Elastomer Interactions. 6. Influence of Oxygen Plasma Treatment on Surface Properties of Carbon Blacks (충전재-탄성체 상호작용. 6. 산소 플라즈마 처리가 카본블랙표면특성 미치는 영향)

  • Cho, Ki-Sook;Zoborski, M.;Slusarski, L.;Park, Soo-Jin
    • Elastomers and Composites
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    • v.37 no.2
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    • pp.99-106
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    • 2002
  • In this work, the surface properties and mechanical interfacial properties of the carbon blacks treated by oxygen plasma were investigated. The surface properties of carbon black by oxidation process of oxygen plasma were studied in acid-base surface value, zeta potential, and X-ray photoelectron spectroscopy (XPS). And their mechanical interfacial properties of the carbon black/rubber composites were evaluated by the composite tearing energy ($G_{III}c$). As a result, it was found that the introduction rate of oxygen-containing polar functional groups, such as carboxyl, hydroxyl, lactone, and carbonyl groups, onto the carbon black surfaces was increased by increasing the plasma treatment time. It revealed that the polar rubber, such as acrylonitrile butadiene rubber (NBR), showed relatively a high degree of interaction with oxygen-containing functional groups of the carbon black surfaces, resulting in improving the tearing energy ($G_{III}c$) of the carbon black/acrlyonitrile butadiene rubber composites.

A Study on PTC/NTC Behavior of Fluorinated Carbon Black-filled HDPE Matrix Compounds (불소처리된 카본블랙을 충전한 HDPE 기지 컴파운드의 PTC/NTC 특성에 관한 연구)

  • Soo-Jin Park;Su-Wan Song;Min-Kang Seo;Jae-Sup Shin;Kyuchul Kim
    • Journal of the Korean Chemical Society
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    • v.47 no.2
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    • pp.147-154
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    • 2003
  • In this study, the fluorinated carbon blacks(CB) were used to reduce the negative temperature coefficient (NTC) phenomenon of the CB-filled high density polyethylene(HDPE) compounds in the fluorination pressure of 0.1-0.4 MPa. The changes in surface properties of the CB were investigated by using FT-IR, XPS and contact angle measurements. From the FT-IR results, the fluorinated CB showed the C-F absorption peak at 1400-1000 cm$^{-1}$ and the peak intensity was increased with increasing the fluorination pressure. Also, the analysis of XPS spectra of the fluorinated CB indicated that fluorine content was increased with increasing the fluorination pressure. Meanwhile, the surface free energy of the fluorinated CB was decreased with increasing the fluorination pressure. Consequently, the increase of fluorine contents on CB made a disappearance of NTC behaviors of CB/HDPE compounds, which was probably due to the reduction of CB reaggregation after melting point of the HDPE, resulting from decreasing the surface free energy of CB particles.

Elastic Response of Filled and Unfilled Green Rubbers (충전 및 미충전 미가교 고무의 탄성반응)

  • Lee, K.Y.;Shin, S.;Chung, K.H.;Yoon, T.H.;Kaang, S.
    • Elastomers and Composites
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    • v.38 no.3
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    • pp.273-280
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    • 2003
  • Elastic responses on both pure natural rubber melts with different molecular weights and the rubber compounds mixed with various types of carbon blacks were investigated in this study. Furthermore, the degree of bound rubber was measured for various carbon blacks with different sizes and structures in order to study the interaction between the rubber and carbon blacks, and to study the correlation between the interaction and the elastic responses. As a loading amount of carbon black increased, the degree of bound rubber became higher, particularly far carbon-black particles with smaller sizes and higher structures. The elastic responses of the rubber melt filled with carbon black remarkably improved, as compared with those of unfilled rubber melt, specially in carbon black showing higher contents of bound rubber. Stress relaxation was more delayed and recovery behavior became more elastic, as the molecular weight of the rubber melt increased and the size of carbon-black particles was decreased. Permanent set became higher, as the molecular weight of the rubber melts decreased and the size of carbon-black particles increased.