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Effect of neodymium stearate on cure and mechanical properties of epoxidized natural rubber

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Journal of Rare Earths 2012年第7期30卷 721-724页

作者：罗勇悦杨昌金汪月琼何灿忠钟杰平廖双泉彭政刘兴训 Chinese Agricultural Ministry Key Laboratory of Tropical Crop Product Processing Agricultural Product Processing Research InstituteChinese Academy of Tropical Agricultural Sciences School of Materials and Chemical Engineering Hainan University School of Science Guangdong Ocean University School of Materials Science and Engineering South China University of Technology

The effect of neodymium stearate （NdSt） on cure and mechanical properties of expoxidized natural rubber with 25 mol.% epoxidation （ENR25） was studied in the concentration range of 0 to 2 phr, and the relationship between structure and mechanical properties of ENR25 vulcanizates was also discussed. Neodymium sterate was synthesized by saponification of stearic acid with newly formed rare earth hydroxide m water medium, and the structure of NdSt was investigated by Fourier transform infrared spectroscopy （FTIR）. Crosslinking den- sity of vulcanized natural rubber was studied by equilibrium swelling method. The results indicated that the interaction force between carboxylic ion of NdSt prepared in the lab and Nd ion was mainly ionic bond through FTIR analysis. NdSt could accelerate the vulcanization of ENR25 and influence the network structure of ENR25 vulcanizates. The incorporation of 1 phr NdSt for ENR25 vulcanizatcs showed the optimal aging resistance.

关键词： neodymium stearate cure ENR25 crosslink density mechanical properties rare earths

cure OF PREPOLYMER BASED ON METHYL METHACRYLATE/STYRENE AND OPTICAL PROPERTY AND HYDROTHRMAL STABILITY OF TRANSPARENT FIBRE—REINFORCED THERMOPLASTIC COPOLYMER COMPOSITES

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Journal of Wuhan University of Technology(Materials Science) 1994年第2期9卷 42-49页

作者：赵方鸣郁轶澄刘雄亚 Wuhan Univ of Tech China

: Copolymers used for transparent fibre glass-reinforced thermoplastic composite -were prepared from methyl methacrylate (.MMA) and styrene (St). Composites containing 20~25 ivt% glass fibre and 0. 7 mm in thickness had an overall optical transmission of 88 ~90%. The gel time and cure time of the prepolymers from MM A and St decreased markedly ivith addition of tiie two linear unsaturated polyesters (.LUPE) and curing process of composite laminate became controlling easily-The effect of the concentration of LUPE on thermal stability of copolymers 晅he optical properties and the hydrothermal sta-bility of composites was investigated by comparing with those of trans-parent unsaturated composites .

关键词： transparent fibre composites MM A styrene copoly-mer cure hydrothermul stability

Two Sorts of Fiber Optic Sensor Monitoring the cure Process of Composite Laminate

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High Technology Letters 2000年第2期6卷 61-69页

作者：李辰砂 Harbin Inst of Technology Harbin China

Two new sorts of fiber optic sensor are designed. Firstly, the variation of refractive index of resin surrounding the embedded fiber optic was mean to observed by measuring the speckle spatial spectrum at the end face of the fiber optic. Secondly, it is proposed to measuring the change of thickness of the laminate by using fiber optic microbend attenuation. The experiment results measured by the fiber optic sensors are given. The first sort of sensor was found to be able to detect the viscosity process of the resin matrix during cure process includeing the minimum point of viscosity, the gelation point and the end point of cure process; the second sort of sensor could detect the course of change of the thickness of composite laminate pressed by operation *** is benefit for us to optimize the operation technology and to establish the intelligent monitoring system about curing process of composites for the reason that the viscosity process and the change course of the thickness of laminate can be monitored.

关键词： Composites cure Fiber optic sensor Speckle Microbend

Hepatitis C virus cure with direct acting antivirals: Clinical,economic, societal and patient value for China

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World Journal of Hepatology 2019年第5期11卷 421-441页

作者： Qing Xie Jian-Wei Xuan Hong Tang Xiao-Guang Ye Peng Xu I-Heng Lee Shan-Lian Hu Department of Infectious Diseases Ruijin HospitalShanghai Jiaotong University School of MedicineShanghai 200025China Health Economic Research Institute School of PharmacySun Yat-Sen UniversityGuangzhou 510006Guangdong ProvinceChina Center of Infectious Diseases West China Hospital of Sichuan UniversityChengdu 610041Sichuan ProvinceChina Second Affiliated Hospital of Guangzhou Medical University Guangzhou 510260Guangdong ProvinceChina Gilead Sciences Inc Shanghai 200122China Gilead Sciences Inc Foster CityCA 94404United States School of Public Health Fudan UniversityShanghai 200032China Shanghai Health Development Research Center Shanghai 200032China

About 10 million people in China are infected with hepatitis C virus(HCV),with the seroprevalence of anti-HCV in the general population estimated at 0.6%.Delaying effective treatment of chronic hepatitis C(CHC)is associated with liver disease progression,cirrhosis,hepatocellular carcinoma,and liver-related *** extrahepatic manifestations of CHC further add to the disease burden of *** CHC-related advanced liver diseases and systemic manifestations are costly for both the healthcare system and *** of work productivity due to reduced well-being and quality of life in CHC patients further compounds the economic burden of the ***,pegylatedinterferon plus ribavirin(PR)was the standard of ***,a substantial number of patients are ineligible for PR treatment,and only 40%–75%achieved sustained virologic ***,PR is associated with impairment of patient-reported outcomes(PROs),high rates of adverse events,and poor *** the advent of direct acting antivirals(DAAs),the treatment of CHC patients has been *** have broader eligible patient populations,higher efficacy,better PRO profiles,fewer adverse events,and better adherence rates,thereby making it possible to cure a large proportion of all CHC *** article aims to provide a comprehensive evaluation on the value of effective,curative hepatitis C treatment from the clinical,economic,societal,and patient experience perspectives,with a focus on recent data from China,supplemented with other Asian and international experiences where China data are not available.

关键词： Hepatitis C Value of cure Sustained virologic response End stage liver disease Prevention of transmission Cost-effectiveness Productivity Societal value Patient-reported outcomes

Will there be a cure for HIV/AIDS? Making the dream a reality

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Asian Pacific Journal of Tropical Biomedicine 2016年第5期6卷 441-442页

作者： Alcides Troncoso Department of Infectious Diseases School of MedicineUniversity of Buenos Aires

It has been more than 30 years since AIDS was introduced in people's daily life, and it is a milestone that causes taboos, myths and prejudices. At that time, a patient told me his feelings, and he was very convincing: "I am horrified of living and afraid of dying." Three decades later, AIDS infection is not a death sentence anymore. First, doctors could make that infected patients did not die from the disease; then, that the medication which kept them alive was not so toxic. And finally, that the treatments were more comfortable. And once at this point, the possibility that the virus may disappear from the body is a more realistic goal than ever. The story of AIDS has changed and, for the first time, we can foresee in the short term the beginning of the end of the pandemic. Now it is not about whether the cure is possible or not, but about when we will have it. This current momentum, so hard to get, should be maintained. We have never been so close to achieving this goal. Although the end of the pandemic is close, this is not enough. It is worrying that some world leaders have absolved themselves of responsibility for not stopping or at least having understood the explosion of the pandemic as if it was a natural disaster. "Zero tolerance for HIV" requires a profound understanding of the stigma and discrimination of the infected people to finally get rid of the epidemic of fear and the devastation that the pandemic caused.

关键词： HIV AIDS cure Prejudices

基于改进cure聚类算法的无监督异常检测方法

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通信学报 2010年第7期31卷 18-23,32页

作者：周亚建徐晨李继国北京邮电大学网络与交换技术国家重点实验室信息安全中心北京100876 北京邮电大学网络与信息攻防技术教育部重点实验室北京100876 北京邮电大学灾备技术国家工程实验室北京100876 河海大学计算机与信息学院江苏南京210098

提出了一种基于改进的cure聚类算法的无监督异常检测方法。在保证原有cure聚类算法性能不变的条件下,通过对其进行合理的改进获得更加理想的簇,也为建立正常行为模型提供了更加纯净的正常行为数据。在建模过程中,提出了一种新的基于超... 详细信息

提出了一种基于改进的cure聚类算法的无监督异常检测方法。在保证原有cure聚类算法性能不变的条件下,通过对其进行合理的改进获得更加理想的簇,也为建立正常行为模型提供了更加纯净的正常行为数据。在建模过程中,提出了一种新的基于超矩形的正常行为建模算法,该算法有助于迅速、准确地检测出入侵行为。实验采用KDDcup99数据,实验结果表明该方法能够有效地检测网络数据中的已知和未知入侵行为。

关键词：无监督异常检测 cure 超矩形聚类数据挖掘

基于cure聚类算法的区域滑坡敏感性评价研究

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韶关学院学报 2023年第12期44卷 31-35页

作者：戴俊威 MWAKAPESA Deborah Simon 韶关学院商学院广东韶关512005 江西理工大学信息工程学院江西赣州341000

针对现有基于聚类算法的滑坡敏感性评价模型存在难以设置参数等问题,采用cure(Clustering using representative)聚类算法建立区域滑坡敏感性评价模型,并对延安宝塔区进行评价.实验结果表明,评价结果与实际一致,并且准确度比KPSO(K-mean... 详细信息

针对现有基于聚类算法的滑坡敏感性评价模型存在难以设置参数等问题,采用cure(Clustering using representative)聚类算法建立区域滑坡敏感性评价模型,并对延安宝塔区进行评价.实验结果表明,评价结果与实际一致,并且准确度比KPSO(K-means+particle swam opimization)模型高出17.2%,证明该模型的有效性,可为防灾减灾提供理论支撑.

关键词：滑坡敏感性评价聚类算法 cure K-means

cure Characteristics and Mechanical Properties of Pineapple Leaf Fibre Filled Natural Rubber

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Journal of Minerals and Materials Characterization and Engineering 2018年第6期6卷 601-617页

作者： Chinenye C. Ekwueme Isaac O. Igwe Department of Polymer and Textile Engineering Federal University of Technology Owerri Nigeria

The cure characteristics and mechanical properties of natural rubber filled with pineapple leaf fibre (PLF) were studied at different filler contents and particle sizes. The PLF was characterized for filler properties while carbon black (N330) served as the reference filler. The natural rubber vulcanizates were compounded on a two-roll mill. Results showed that PLF (300 μm) filled natural rubber vulcanizates exhibited the highest maximum torque (Tmax) (47.04 lb-in) at filler content, 10 phr among the filler particle sizes investigated. The minimum torque (Tmin) of the vulcanizates generally increased with the increase in filler contents and particle sizes. The scorch times of the rubber vulcanizates did not vary with fibre content while the cure times of PLF (300 μm) filled rubber vulcanizates decreased with filler content. The tensile strength (TS) of PLF (150 μm) filled natural rubber vulcanizates generally increased with the increase in filler content whereas the tensile modulus of the rubber vulcanizates decreased steadily with increasing filler particle size at filler contents, 5 and 30 phr. The elongation at break (EB) of the rubber vulcanizates exhibited no general order of variation with filler content and particle size, and was generally greater than that of unfilled natural rubber. The flexural strength of the rubber vulcanizates increased with increasing filler particle size at filler contents, 20 and 40 phr. The addition of PLF and carbon black improved the compression strength of the rubber vulcanizates, and which for PLF (300 μm) and CB fillers generally increased with the increase in filler content. The study has demonstrated the enhancement of properties of natural rubber vulcanizates on incorporation of PLF into natural rubber, however, the property enhancements obtained were less than those recorded for CB filled natural rubber vulcanizates.

关键词： Natural Rubber Pineapple Leaf Fibre Carbon Black Mechanical Properties cure Characteristics

cure Characteristics, Mechanical and Swelling Properties of Marble Sludge Filled EPDM Modified Chloroprene Rubber Blends

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Advances in Materials Physics and Chemistry 2012年第2期2卷 90-97页

作者： Khalil Ahmed Shaikh Sirajuddin Nizami Nudrat Zahid Raza Khaula Shirin Applied Chemistry Research Centre Pakistan Council of Scientific and Industrial Research Laboratories Complex Karachi Pakistan Department of Chemistry University of Karachi Karachi Pakistan

In the present study, attempts have been made to modify Marble Sludge (MS) filled Ethylene-propylene-diene monomer (EPDM) with Chloroprene rubber (CR). Compounding was carried out on a two-roll mill and vulcanized at 155℃. The modified blend of MS filed EPDM/CR was characterized on the basis of the effect of blend ratio on cure characteristics, mechanical and swelling properties of blends were investigated. The effect of thermal aging on mechanical and swelling behavior in aromatic, aliphatic and chlorinated solvents of cured MS filled EPDM/CR blend was also examined. The minimum torque and maximum torque of the blend first increased and then slightly decreased after the increasing of CR content in MS filled EPDM/CR blends. Scorch time, cure time, cure rate index, tensile strength, tear strength, hardness increased with increasing CR content in the MS filled EPDM compound, but elongation at break, resilience, abrasion loss, mole % uptake, swelling index and percentage of soluble fraction decreased, resilience, abrasion loss, mole % uptake, swelling index and percentage of soluble fraction decreases. Accelerated aging performance of cured composites also influenced by increasing CR content in MS filled EPDM compound.

关键词： Marble Sludge cure Characteristics Mechanical Properties Swelling Parameters Aging