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含酚羟基聚酰亚胺薄膜的研制 虞鑫海1 (1.东华大学,应用化学系,上海,201620) 摘要:以2,2-双(4-羟基苯基)丙烷(BHPP)为原料,经过硝化反应和还原反应,获得了高纯度的2,2-双(3-硝基-4-羟基苯基)丙烷(BNHPP)和2,2-双(3-氨基-4-羟基苯基)丙烷(BAHPP)化合物.利用差示扫描量热计(DSC),傅立叶转换红外光谱仪(FT-IR)等仪器,对它们进行了表征.此外,用2,2-双(3-氨基-4-羟基苯基)丙烷(BAHPP)化合物,4,4''-二氨基二苯醚(44ODA)与均苯四甲酸二酐(PMDA)在强极性非质子有机溶剂中进行聚合反应,得到了高粘度的含酚羟基聚酰胺......
): 275-278.HE Shu-xian, WANG Jun, SUN Bao-de, ZHOU Yao-he. Effect of high density pulse current on solidification structure of hypereutectic Al-19Si alloy[J]. The Chinese Journal of Nonferrous Metals, 2002, 12...,有助于改善合金的力学性能. 关键词:高硅铝合金;旋转磁场;励磁电流;旋转频率;相组织 中图分类号:TG146.21 文献标志码:A Influence of rotating magnetic field on evolution of phase structure evolution in high-silicon aluminum......
J. Cent. South Univ. (2017) 24: 1637-1646 DOI: 10.1007/s11771-017-3569-7 Structure optimal design research on backfill hydraulic support ZHANG Qiang(张强), ZHANG Ji-xiong(张吉雄), QI Wen-yue(齐文跃), ZHOU... support optimization design and provided the method of optimal design of key structural components, like four-bar linkage, rear canopy and tamping structure; the method is further elaborated as changing......
on structure of roll casting aluminum strip MAO Da-heng(毛大恒)1, ZHANG Yun-fang(张云芳)2, NIE Zhao-hui(聂朝辉)1, LIU Qiao-hong(刘巧红)1, ZHONG Jue(钟 掘)1 (1. School of Mechanical and Electrical Engineering... casting aluminum strip on plane twin-roll cast-roller with double-heads ultrasonic tools was carried out, and the metallographic structure of the roll casting aluminum strip treated by ultrasonic......
海南乐东抱伦金矿床控矿构造特征及主成矿期年代学研究陈颖民1,傅杨荣2,周迎春2,周慧文2,薛开文2(1.海南省海口市海南省地质局2.海南省地质调查院)摘 要:抱伦金矿床的赋矿层位为志留系下统陀烈组含碳千枚岩.豪岗岭"斜列式复背斜"控制矿床的空间展布.金矿体明显受北北西向相互平行的压扭性断裂形成的破碎带控制,金矿化与含矿石英脉中的不同期次形成的石英有关,其中以第二期为最主要的矿化期.矿区外围尖峰岭岩体至少由三期岩浆作用形成,与金矿床的形成有密切关系.金矿床成矿结束时期为217~221.2 Ma,属于印支晚期.抱伦......
Effects of cerium addition on solidification structure and mechanical properties of 434 ferritic stainless steel张少华1,于彦冲2,王社斌2,李豪11. College of Materials Science and Engineering, Taiyuan University... of Ce refiners on the solidification structure and the mechanical property of ferritic stainless steel were investigated, the corresponding mechanisms were also discussed. The results showed......
Effects of cerium addition on solidification structure and mechanical properties of 434 ferritic stainless steel张少华1,于彦冲2,王社斌2,李豪11. College of Materials Science and Engineering, Taiyuan University... of Ce refiners on the solidification structure and the mechanical property of ferritic stainless steel were investigated, the corresponding mechanisms were also discussed. The results showed......
solidification are. Key words: Al-Mg alloy; Al-Mg-Zn alloy; high pressure solidification; Al phase; solid solution structure 合金凝固后,形成的固溶体相对其整体性能有很大影响,而固溶度和晶格常数是用以表征固溶体结构特征的两个最基本的参数.当高压(GPa级)作用于合金的凝固过程时,由于其具有改变... structure of Al phase in Al-Mg and Al-Mg-Zn alloys solidifying under normal pressure and high pressure WANG Zhen-ling1, ZHANG Tao2, LI Li2, ZHOU Yue-bo1, WANG Hong-wei3, WEI Zun-jie3 (1. School......
Structure and magnetic properties of intermetallic compounds Gd5Si2-xGe2-xM2x LUO Guang-sheng(罗广圣)1, 2, LEI Yu(雷 宇)2, 3, XIN Yong(辛 勇)4, ZHOU Zheng-you(周正有)2 1. School of Materials Science...: The effects of substituting stable elements of M(M=Mn, Mo, Al, V) for nonmagnetic Si and Ge on the structure and magnetic properties of Gd5Si2Ge2 were investigated by means of X-ray powder diffraction......
In-situ monitoring of nickel electrodeposit structure using electrochemical noise technique YANG Zhong-nian(杨仲年)1, ZHANG Zhao(张 昭) 1, LENG Wen-hua(冷文华) 1, LING Ke(凌 克) 1, ZHANG Jian-qing(张鉴清)1,2... structure, and the maximum relative energy of the RP-EDP (re-plotted relative energy distribution plot), which is obtained from wavelet analysis, defined in the region with smaller scales. While under......