固体浮力材料用中空环氧大珠的制备及性能研究

以发泡聚苯乙烯(EPS)泡沫球、环氧树脂、硅灰石纤维为原材料,采用喷涂法制备了中空环氧大珠并研究了硅灰石纤维添加量、目数和表面改性对中空环氧大珠性能的影响。结果表明:使用200目经过表面改性的硅灰石纤维且硅灰石纤维和环氧树脂添加比例在0.8∶1到1∶1之间时,得到的中空环氧大珠密度为0.3 g/cm^3,抗压强度为6 MPa,能够满足固体浮力材料实际使用需求。     

硅灰石填充保鲜膜的性能研究

为增加保鲜膜透气和透湿性能,以LLDPE/LDPE(质量比75∶25)为基材,以硅灰石为填料,制备了不同处理方式和不同添加量的硅灰石保鲜膜。结果表明:随着硅灰石添加量的增加,薄膜的拉伸强度和断裂伸长率逐渐降低,未经处理的硅灰石填充膜的透气和透湿量明显提高,经偶联剂和酸处理的硅灰石能很好地提高与树脂的相容性,薄膜的拉伸强度和断裂伸长率都高于未处理填充膜,且透气系数和透湿系数与空白膜相比也有明显改善。     

剑麻纤维/硅灰石混杂增强摩擦制动材料的性能

选用纳米粒子改性酚醛树脂为基体,以剑麻纤维和硅灰石混杂为增强纤维,制备了无石棉复合摩擦材料。采用D-MS定速摩擦机对样品进行定速试验,利用扫描电镜对磨损表面进行分析,研究了剑麻纤维/硅灰石不同配比对摩擦材料性能的影响。结果表明,当剑麻纤维和硅灰石的配比为1∶2时,该摩擦材料的力学性能较好,摩擦系数稳定在0.40.5之间...     

树脂基体种类对三维中空夹芯织物复合材料力学性能影响的研究

以不饱和树脂和环氧树脂为基体,与三维中空织物分别复合成中空夹芯织物复合材料,利用万能材料试验机分别对2种复合材料的拉伸、压缩和弯曲性能进行测试,研究了树脂种类对复合材料力学性能的影响规律。结果表明:不饱和树脂与固化剂质量比为100∶2,固化温度为70℃时,复合材料具有最佳的拉伸、弯曲和压缩性能。环氧树脂基复合材料的弯曲和压缩性能远优于不饱和树脂基复合材料,而拉伸性能则相差不大。     

南通口岸首批硅灰石出口比利时

正1月5日,装载12460吨硅灰石的新加坡籍"PANAMANA"轮,经检验检疫合格后,顺利驶往比利时。这是南通口岸今年首次出口硅灰石。硅灰石属于一种无机针状物质,具有良好的绝缘性,较高的耐热,耐候性能,且无毒无味,无放射性。硅灰石作为填充剂和添加剂,被广泛应用于塑料、橡胶、陶瓷、涂料、建材等行业。     

针状硅灰石/NR-SBR-BR复合材料力学性能

研究不同粒径、添加量的针状硅灰石/NR- BR SBR复合材料的拉伸性能、硬度、摩擦系数等力学性能及微观结构.结果表明:针状硅灰石具有较好的增强效果,能较大程度的提高NR BR-SBR橡胶的摩擦系数；硅灰石粒径、添加量对复合材料的各项性能影响较大,硅灰石添加量为45份时,复合材料的拉伸性能最好、摩擦系数较高,可用作高摩...     

庚二酸处理硅灰石填充改性聚丙烯

采用庚二酸对硅灰石进行表面处理,研究了复合材料的力学和结晶性能。DSC和WAXD结果表明,庚二酸处理的比未处理硅灰石有更强的诱发聚丙烯β晶的能力。偏光显微镜观察表明,庚二酸处理硅灰石大大减小了β晶的粒径,改善了硅灰石与聚丙烯的相容性。     

硅灰石的开发应用现状及前景

硅灰石作为一种新兴的非金属工业矿物,被广泛应用于各个工业领域。本文主要介绍硅灰石的优良性能及其在各领域的应用、硅灰石的开发利用现状及前景。     

硅灰石针状粉的表面改性及在橡胶中的应用

通过对硅灰石针状粉的表面改性效果及在橡胶中的应用试验研究，认为硅灰石的改性时间、改性温度、改性剂用量、转子转速等工艺条件对硅灰石的改性效果有影响；改性后的硅灰石在橡胶中使用，可赋予橡胶制品良好的耐磨、耐老化和耐疲劳性能，但对橡胶的定伸应力损害目前还是难以克服的；不同种类的偶联剂配合使用、不同形状的矿物填料配合使用对胶料的物理性能有不同的影响。     

盐雾环境中玻璃纤维/不饱和聚酯复合材料腐蚀深度对弯曲性能的影响

采用中性盐雾加速老化试验模拟海洋大气环境, 对玻璃纤维/不饱和聚酯复合材料在盐雾环境中的弯曲性能进行了研究。通过玻璃纤维/不饱和聚酯复合材料经盐雾加速老化后的吸湿率、玻璃化转变温度、巴氏硬度和弯曲性能的变化, 结合金相显微镜观测得到的腐蚀深度, 研究腐蚀深度对玻璃纤维/不饱和聚酯复合材料耐久性的影响。结果表明:老化初期玻璃纤维/不饱和聚酯复合材料的吸湿率随时间增长较快, 随后增长逐渐趋于稳定。玻璃纤维/不饱和聚酯复合材料的玻璃化转变温度呈现先增加后下降的趋势, 老化180 d后玻璃化转变温度增加了2.1%;老化180 d后玻璃纤维/不饱和聚酯复合材料的巴氏硬度与老化前相比降低了17.6%, 弯曲强度损失率为10%。基于金相显微镜分析得到老化后玻璃纤维/不饱和聚酯复合材料的腐蚀深度, 建立了腐蚀深度与弯曲强度之间的关系。      

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

Brainstorming for ISO Strategy 2016-2020

正Responding to ISO’s appeal for survey for the to-be-developed ISO Strategy Plan for 2016-2020,SAC hosted a special workshop over the needs and comments of various fi elds on June 8 in Beijing.The workshop was attended by ISO President-elect and Ansteel General Manager Zhang Xiaogang,SAC Vice-Administrator Yu Xinli,and 30 experts from     

CNAS Passes APLAC's PTP Review

正The review group of Asia Pacific Laboratory Accreditation Cooperation(APLAC)carried out a 4-day peer review of the proficiency testing provider(PTP)for China National Accreditation Service for Conformity Assessment(CNAS)from July 28 to 31,2014.CNAS passed the PTP review with excellent performance.Two senior peer reviewers of APLAC made a comprehensive,rigorous and detailed review of CNAS’s PTP accreditation activities,and made the on-spot inspection of the review groups in Shanghai and Shenzhen respectively.     

新闻(英文)

正China and Greece Sign the Standardization Cooperation Agreement Witnessed by Chinese Premier Li Keqiang and Greek Prime Minister Antonis Samaras,AQSIQ Minister Zhi Shuping and ELOT Chairman and Executive Director Angelos Tolkas signed the SAC-ELOT Standardization Cooperation Agreement.The Agreement is one of the critical cooperation documents signed during Li Keqiang’s visit in Greece,encouraging China and Greece to     

Win-Win Cooperation

正The Chinese Premier Li Keqiang's recent trip to the UK has reinforced the China-UK comprehensive strategic partnership;just as the British Prime Minister David Cameron put it,"the relationship is gaining in strength,depth and understanding"after a bucket of business deals being inked worth more than 30 billion US dollars.From the first agreement signing in 2004 to the new agreement of mutual standards recognition and adoption in     

Systematic Approach for Emerging Industry

正A national directory of standards complexes for strategic emerging sectors was recently developed and released jointly by 12governmental departments,namely,SAC,NDRC,MOST,MIIT,MEP,MOA,AQSIQ,State Forest Administration,State Administration of Science and Technology for National Defense,State Oceanic Administration and National Railway Administration.     

Strictest Pollutants Emission Standards

正Four new national standards on air pollutant emission control offi cially issued by the Ministry of Environment Protection(MEP)together with AQSIQ and SAC has been brought into force from July 1,2014.The Emission standard for air pollutants of coal-burning,oil-burning and gasfi red boilers,which is the strictest emission standard historically,will tackle the stubborn pollution problem of boilers and waste incineration in most of China’s regions.     

Instructions to Authors

New Carbon Materials is a bimonthly journal published with the permission of the Ministry of Science and Technology and of the State News and Publication Agency.The journal is sponsored by the Institute of Coal Chemistry,Chinese Academy of Sciences,and is published by Science Press.Aims and Scope     

Progress on Standards Copyright Protection

正Recently,National Copyright Administration of China(NCAC)has rewarded 215 organizations and 179 individuals for their outstanding efforts on investigating standards copyright infringement and piracy in 2013.Hua Jianhua,the Deputy-Director of National Standards Copyright Protection Workgroup Office won a third prize of the national individual award.In 2012,SAC set up the national standards copyright protection working group,and developed policies to crack down standards infringement and piracy behaviors and to strengthen standards copyright protection.