• Polymer(Korea)
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• v.24 no.4
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• pp.564-570
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• 2000

The waste FRP occured in the fabrication of SMC (sheet molding compound) bathtubs and the waste polyurethane foam occured in electronic manufacture and waste insulator were applied as a soundproof and light weight pannel in the waste FRP unsaturated polyester matrix resin composites to recycle. The effect of filler contents on the mechanical properties and interfacial phenomena of the filler and matrix on the composites was evaluated. The tensile strength of composites reached its maximum value of 82.34 MPa when the filler content was 70 wt%, and the more content of reinforcement is increased, the more tensile modulus was decreased. The flexural strength and modulus of composites, reinforced 70 wt% with filler content, were dominant compared to the other samples to 72.5 MPa, 958.4 MPa respectively. When composite of reinforced 70 wt% with filler content, it was confirmed that pull out phenomena and cracks did not occur in the interface of reinforcement and matrix resin through the SEM observation. Also, waste FRP and urethane foam were dispersed well into matrix resin as filler.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.33 no.4
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• pp.139-144
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• 2023

Stone papers made of inorganic filler and plastic polymer do not use pulp, which is the main raw material of existing papers, so they contribute to the preservation of nature and can be used as more eco-friendly materials when they have biodegradability. Since most stone papers are manufactured by hot extrusion, the amount of ceramic fillers and related physical properties are limited to control manufacturing workability. In this study, the stone paper composition was prepared in a liquid form using solvents, so that there was little limitation on the amount of ceramic filler added and it was also easy to add additives to control biodegradability. They were fabricated from eco-friendly raw materials using waste oyster shells as an inorganic filler and (recyclable) PVC materials as an organic binder. After making a solution using common solvents for PVC, inorganic filler and cellulose to impart biodegradability were mixed and processed into sheets to prepare solvent-based stone papers, and their paper properties were evaluated.

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2004.05a
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• pp.329-331
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• 2004

본 연구에서는 토양을 충진한 컬럼을 사용하여 질산화 반응을 촉진시키기 위한 첨가제에 따른 효과를 검토하였다. 토양만을 충진한 컬럼에서는 $NH_{4-}$/N의 약 26%가 질산화 되었으며 제올라이트를 첨가 하였을 때 실험초기에는 $NH_{4-}$/N가 유출되지 않다가 20일 이후부터 $NH_{4-}$/N의 농도가 증가 하기 시작하였으며 이는 제올라이트에 의한 흡착능력의 저하로 사료된다. 폐굴껍질 20% 충진한 토양컬럼에서는 실험 95일까지 99.7%의 질산화율을 보았다. 위의 결과로부터 알 수 있듯이 토양컬럼에 폐굴껍질과 제올라이트를 첨가제로 충진하였을 경우 질산화 반응을 촉진시켜서 질산화율을 높일 수 있음을 확인 할 수 있었다.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2007.06a
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• pp.225-226
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• 2007

나노 기술은 21 세기에 들어와 모든 산업에 고루 이용되며 미래를 이끌어 나갈 기숱로 평가되고 있다. 고압 회전기용 주절연재료의 개발에서도 에폭시에 나노충진제를 혼합하여 복합재료로 만드는 나노기술이 활용되고 있으며, 이러한 나노기술을 바탕으로 절연성능을 높이고, 열적, 기계적 안정성을 높이는 기술 개발에 관심을 기울이고 있다. 하지만 이러한 성능향상을 위해서는 반드시 에폭시 기지 내에 충진제가 골고루 분산되어야 하며. 에폭시의 점도로 인해 제조 과정에서 발생하는 기포의 생성은 시료의 제조에 큰 영향을 끼치게 된다. 본 연구에서는 이러한 점에 착인하여 무충진 시료와 제조과정에서 혼입될 수 있는 불순물, 족 분산을 위한 유기 용매를 제조과정에서 고의로 혼합하여 이에 따른 기계적/유전적 특성과 엉항를 살펴보았다.

• 한국도로학회:학술대회논문집
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• 2004.10a
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• pp.215-218
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• 2004

• 한국전기화학회:학술대회논문집
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• 2001.04a
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• pp.35-35
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• 2001

• Proceedings of the Membrane Society of Korea Conference
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• 1998.04a
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• pp.49-52
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• 1998

1. 서론 : 화약이나 고체 충진제, 고체로\ulcorner 추진제의 산화제, slurry blasting agent 및 동물사료의 식품첨가제로 사용되고 있는 과염소산은 발화나 폭발성이 매우 강한 산화제로 정확한 순도를 측정하는 것은 중요하다. 용량분석법과 중량분석법에 비교하여 조작이 간단하고 편리한 과염소산이온의 농도를 직접 측정할 수 있는 PVC막 전극에 대한 많은 연구가 진행되고 있다. (생략)

• Journal of the Microelectronics and Packaging Society
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• v.6 no.4
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• pp.41-48
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• 1999

Silica is the most popular materials as a filler of EMC for microelectronic packaging. However, because of its low thermal conductivity, the use of silica is restricted to parts requiring high thermal dissipation. The superior fluidity of EMC can be achieved with a combination of filler size distribution. In this study, physical properties of EMC filled with the crystalline silica(13$\mu\textrm{m}$) which have high fluidity and low cost and the AlN(2 $\mu\textrm{m}$) which have high thermal conductivity and low coefficient of thermal expansion were evaluated by changing the AlN/silica ratios. As a result of the evaluation of physical properties of EMC, the optimum mixing ratio of AlN/crystalline silica was 0.3/0.7. In this condition, binary mixture(AlN/crystalline silica) filled EMC showed superior properties, i.e., in the thermal conductivity, CTE, dielectric constant, flexural strength, and thermal shock resistance without reduction of fluidity.

• Journal of the Korean Chemical Society
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• v.21 no.5
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• pp.379-383
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• 1977

Since the organophilic bentonite disperses well in polymer matrix, a composite material of polymer and bentonite was studied for its mechanical properties. To increase the degree of dispersion and the bond in forces to the polymer matrix, bentonite, encapsulated by imidazoline, was used as a filler. Polyethylene powder of particle size of 100 mesh was used, and organophilic bentonite, so-called bentone, whose particle size was 250 mesh was also used in this experiment. V-type mixer was used for mixing and Banbury mixer was used for melt-blending. The sample specimen were made by heating the mixture in the plate press, and the specimen were formed as a sheet, exactly the same as the mold on the plate. Tensile strength, bending strength and compressive strength were studied specially. Tensile strength, elongation rate, bending strength and bending rate at constant pressure were decreased as the filler content increased. Compressive strength was increased as the filler content increased.

• Journal of the Korean Applied Science and Technology
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• v.31 no.2
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• pp.238-243
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• 2014

The mechanical properties of NATM resin were measured by SEM, FT-IR spectra, tensile properties, mole ％ of [NCO/OH], and particle size analyzer on stainless steel. Growing concerns in the environment-friendly NATM resin, we have synthesized the solvent-free NATM resin to be coating on metals such as stainless. The properties of the synthesized NATM resin to be contained polyols, MDI, silicone surfactant, fillers and crosslink agents(diethyltoluene diamine, anhydrosorbitol), that they have highly stronger in intensity and longer durability than general NATM resin to be contained polyols, IPDI, silicone surfactant, fillers in general packing materials and coatings. The rigid segments of polyurethane in mechanical properties of coatings were due to cross linkage and the increase mole % of [NCO/OH]. In conclusion, the NATM microstructure with cross linkage can be good material for coating of anticorrosion of metal substrates such as stainless steel.