• 한국방재학회:학술대회논문집
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• 2010.02a
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• pp.46.2-46.2
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• 2010

아스팔트 포장의 공용성능 행장을 위해 널리 사용되고 있는 폴리머 개질 아스팔트(PMA)는 높은 생산온도와 다짐온도로 인해 생산 시 연료 소비가 많고 시공관리가 어려운 단점을 가지고 있다. 이에 중온형 아스팔트 기술을 접목하여 고온에서의 아스팔트 점도를 낮춤으로써 이와 같은 문제점을 해결하고자 하였다. 바인더의 전반적 공용성능 향상을 위해서 폴리머 (SBR)와 작업성 개선을 위해 Wax 및 기타 첨가제를 혼합하여 아스팔트 바인더를 제조하였으며, 실험결과 PG 82-22의 높은 공용등급의 바인더를 얻었으며, 생산 및 시공온도는 기존의 PMA 아스팔트와 달리 일반 스트레이트아스팔트와 비슷한 수준을 확보하였다. 이를 이용한 아스팔트 혼합물의 공용 성능 면에서도 PMA개질 아스팔트와 비슷한 수준을 나타내었다.

• International Journal of Highway Engineering
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• v.4 no.4 s.14
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• pp.53-66
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• 2002

Asphalt binder characteristics in asphalt mixture are changed due to aging. However. depending upon aggregate and binder used, asphalt mixture dose not show the same level of stiffness and brittleness under the same ageing level. The factors affecting Physical Properties change of the asphalt binder within aged asphalt concrete are not well known and there is limited study which is dealing with this topic This study dealt with evaluation of physical properties of asphalt binder recovered from the mixtures after short-term and long-term aging. Two asphalts. two aggregates. two gradations and four polymers were used to make 32 mixture combinations. The mixtures were prepared and aged artificially in a forced draft oven. The measured physical properties included absolute viscosity, kinematic viscosity and penetration. Statistical analyses were carried out to find out the factor(s) having a significant effect on change of physical property of asphalt binder due to asphalt mixture aging. The results of study shown that aggregate, gradation and polymer had a significant effect on change of physical properties of asphalt binder.

• Polymer(Korea)
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• v.32 no.5
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• pp.470-477
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• 2008

Core shell binder of organic/organic pair that has two different properties within a particle were prepared by a step emulsion polymerization of methacrylate (MMA), styrene (St), ethyl acrylate (EA), butyl acrylate (BA), and 2-HEMA by using an water soluble initiator(APS) in the presence of an anionic surfactant (SDBS). Unwoven tensile strength of the core shell binder after processing and measuring the PSt/PMMA/2-HEM core shell with the binder is a value represents the highest was $10.75\;kg_f$/2.5cm, elongation measurements PEA/PBA core shell binder showed the highest value was 120.00%. In conclusion, using the core shell binders were able to control the mechanical properties such as tensile strength and elongation.

• Cement
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• s.192
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• pp.39-47
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• 2011

최근 온실가스 감축과 기후변화 그리고 녹색성장에 대한 관심증대와 더불어 시멘트 분야의 연구 생산분야는 천연자원 사용량을 줄이고, 소성공정을 도입하지 않은 새로운 개념의 무기바인더가 다시 고개를 들고 있다. 다른 용어로는 비소성, 무시멘트 등으로 표현되기도 하는데, 광의의 개념으로 보면 알칼리 활성화제를 사용한 비소성 무기결합재인 지오폴리머가 바로 그것이다. 지오폴리머 결합재는 1957년 우크라이나의 토목공학회에서 개발한 알칼리 활성 슬래그시멘트에 기원을 두고 있고, 1970년대 말 프랑스의 다비도비치에 의해 지오폴리머라는 용어가 처음 사용되기 시작했다. 알칼리 활성 무기결합재(Alkali-activated inorganic binder)의 정의이다. Alkali-activated inorganic binder는 원래는 결합능력이 없던 재료에 대해서 Alkali-activating 용액을 첨가했을 때, 시멘트처럼 결합능력을 가지게 되는 모든 종류의 결합시스템을 말한다. 국내에도 이미 2000년 초부터 지오폴리머의 개념을 도입한 제품이 상업화되어 오랫동안 품질검증을 거쳐 안정성이 확인되고 있다. 최근에 다시 전남대가 그 동안의 연구성과를 발 빠르게 중소기업에 기술 이전하여 소위 무시멘트 시대에 진입하는 분위기이다. 지난 9월 동아에스텍(주)과 조인트벤처 설립을 위해 손을 잡았고, 사업화가 곧 진행될 것으로 보인다. 이를 계기로 국내에도 무시멘트회사가 본격적으로 등장하게 된 것이다. 따라서 본 고는 무시멘트의 개념을 잘 표현한 문헌으로 일본콘크리트공학 연차논문집, 2010년 1월호를 번역 요약 발췌한 것이다.

• Polymer(Korea)
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• v.35 no.1
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• pp.87-93
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• 2011

We developed a fluorene-containing multifunctional binder polymer for LCD color filter resist, and employing the binder polymer, carbon black based black photoresist (CBR) was prepared in order to apply it to the black matrix (BM). To obtain the multifunction of the binder polymer, we synthesized bisphenol fluorene epoxy acrylate-containing unsaturated polyester and identified the binder polymer structure with $^1H$ NMR, GPC and FTIR. The corresponding BFEA-polyester binder polymer was compared with the commercially available acryl binder toward the application to the CBR. From the BM lithography test, we found that the synthesized BFEA-polyester binder had better photocrosslinking capability and alkali solubility. In addition, the newly developed binder gave a good process margin, good resolution and adhesion property on a glass substrate.

• Journal of the Korean Society of Propulsion Engineers
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• v.2 no.3
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• pp.70-79
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• 1998

The PEG and PCP have been used as a binder of high energy and minimum smoke propellant. In this study, PEG, PCP 0260, PCP 1270 and mixed PEG/PCP as a prepolymer were used, and also used BTTN/DEGDN and BTTN/TMETN as a plasticizer. Before being cured, the solution viscosity of prepolymer and plasticizer was measured with various contents of PCP in PEG and contents of plasticizer at $20^{\cire}C$~$60^{\cire}C$. The results were shown the increased concentration of PCP enhanced the viscosity of solution due to the hydrogen bond of PCP, and the increased contents of plasticizer undoubtedly decrease the viscosity of solution. The cured binders were tested for mechanical properties and measured for glass transition temperature with various concentration of PCP in PEG and contents of plasticizer. The increased concentration of PCP has shown better mechanical properties. This results were attributed to the H-bond. Also, the glass transition temperature was lowered with the higher contents of PCP Finally, with the higher content of PCP in PEG, the better mechanical properties and the lower glass transition temperature and the higher viscosity of solution were shown.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2003.05a
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• pp.468-473
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• 2003

유화중합은 물을 용매로 사용하기 때문에 화재와 폭발의 위험성이 없고 환경문제가 없으며 원료 원가 면에서 저렴한 특징이 있기 때문에 수요가 매년 증가하고 있는 실정이다. 이 같은 장점을 지닌 유화중합은 물을 분산매로 폴리머를 제조하는 유용한 기술이지만 유화제, 이온성의 개시제 등과 같이 폴리머 본래의 성질을 저하시키며 물에 잘 용해되는 성분을 수반한다. 따라서 이러한 기존 유화중합법의 단점을 보완한 새로운 에멀젼 라텍스 제조기술로서, 유화제 대신에 폴리비닐알콜과 같은 보호폴로이드 또는 유기 과산화물을 사용하는 무유화제 제조기법에 대한 연구가 이루어지고, 이와 같이 제조된 에멀젼 라텍스는 기존 공정에 의해 제조된 제품에 비해 내수성과 건조된 필름의 인장 강도 및 여러 매트릭스에 대한 부착력이 향상된다. 그러나 이들 방법으로 제조된 폴리머도 복합 물성이 요구되는 분야에는 한계가 있어 복합 라텍스 제조에 대한 새로운 연구가 최근에 많이 되고 있다.(중략)

• International Journal of Highway Engineering
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• v.6 no.2 s.20
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• pp.15-24
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• 2004

Oxidation causes increment of the quantity of large molecular size or LMS in asphalt and is a major reason for hardening of asphalt binder. An extended service life of pavement on a road is expected by reducing oxidation of binder. Oxidation of binder occurs during hot mixing with aggregates before placement on road and then during in-service after the asphalt pavement is constructed. Quantitative increase of LMS as result of aging after RTFO and PAV was analyzed based on the data from high-pressure gel-permeation chromatography (HP-GPC). Polymer modified asphalt (PMA) after RTFO procedure showed 20-30% increment in LMS and then after PAV procedure more than twice, although the percentage of increment was different according to asphalt brand and grade. The PMAs containing LDPE or SBS, which showed a great mechanical property improvement in previous studies, were selected for characterizing PMA aging In this study. Considerably reduced increment of LMS was observed from the PMA containing LDPE after RTFO and PAV procedures. The GPC result showing the binder with less LMS increment means that the asphalt while being mixed with LDPE was aged less during the aging treatment. The dispersed particle of LDPE in asphalt cement seems to disturb oxidative aging reaction and evaporation.

• Journal of the Korea institute for structural maintenance and inspection
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• v.23 no.5
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• pp.68-74
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• 2019

In this study, the mechanical property and durability of improved bond performance mortar shotcrete was investigated. Mortar shotcrete was prepared by replacing coarse aggregate with 100% fine aggregate in the shotcrete mixture proportion proposed in the road construction standard specification. OPC, GGBFS and anhydrite were used as binders, and polymer powder was substituted for 1% and 2% of binder for improving bond property. From the experimental results, it was found that the compressive strength decreased with increasing polymer addition, but the bond strength increased. The addition of polymer to mortar shotcrete also reduced the drying shrinkage and improved the resistance to carbonation. Initial hydration heat of mortar shotcrete decreased with the addition of polymer, and it was judged that the initial compressive strength decreased.

• Polymer(Korea)
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• v.36 no.3
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• pp.351-356
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• 2012

Acryl binder is a representative organic additive for the manufacture of the display electronic equipment. Acryl binder is usually synthesized by radical copolymerization. Glycidyl methacrylate (GMA), methyl methacrylate (MMA), and methacrylic acid (MAA) were used in this copolymerization of acryl binder. In this study the silane type mercaptane compound was used as a chain transfer agent (CTA) to enhance the adhesion property of the acrylic binder. The CTA used in this experiment was (3-mercaptopropyl) trimethoxysilane (MPTMS). Molecular weight of the copolymer, thickness of the coating, transmittance, and adhesion property were measured. The molecular weight was controlled and the adhesion property was improved by using this silane type chain transfer agent.