Thermophysical Properties of Binary Mixtures of Methyl Methacrylate+Di-Ethers (Ethyl, Isopropyl, and Butyl) at 298.15 and 308.15 K

Experimental data for the densities, dynamic viscosities, sound speeds, and relative permittivities and for three binary systems of methyl methacrylate (MMA)+di-ethers (ethyl, isopropyl, and butyl) at 298.15 and 308.15 K and at atmospheric pressure are reported. The mixture viscosities are correlated by Grunberg–Nissan, McAllister, and Auslander equations over the complete composition range. The sound speeds for the mixtures are also calculated by using free length and collision factor theories, and Nomoto and Junjie equations. From the measured primary properties, deviation functions such as deviations in viscosities, sound speeds, relative permittivities, molar polarizations, excess isentropic compressibilities, and molar electrical susceptibilities were calculated, and the compositional dependence of each of the functions was expressed with a Redlich–Kister type equation. The variation of the Kirkwood correlation factor was determined over the complete composition range.     

甲状腺素T4免疫传感器的研究

报道以甲基丙烯酸羟乙酯与甲基丙烯酸甲酯的共聚物为载体膜材料，研制成非酶标记的Ｔ４免疫传感器，并对载体膜材料的共聚方法及共聚物共聚比与传感器灵敏度的关系进行了探讨。     

MMA7361L的高精度角度检测平台设计

倾角是许多控制系统中需要测量的一个重要参数。针对倾角测量,设计了一种基于ARM微控制器和加速度传感器的角度测量平台。该平台采用基于ARMCortex—M3内核的STM32F103VE为数据处理的核心,利用高精度加速度传感器MMA7361L为测角传感器,同时配置液晶屏和小型键盘实现了人机交互。该平台具有测量精度高、灵敏度高、价格低的特点,应用前景广阔。     

HIPS-g-PMMA的合成及其在HIPS/PVC共混体系中的增容作用

采用自由基引发的溶液聚合法合成了高抗冲聚苯乙烯接枝聚甲基丙烯酸甲酯(HIPS-g-PMMA)增容剂，考察了引发剂用量、反应温度及反应时间对增容剂的接枝率及支链摩尔质量的影响；同时对增容剂对HIPS／PVC共混体系的增容效果作了考察。结果表明：最佳反应条件是反应温度80℃，反应时间4h，引发剂用量以0．2～0．25g为宜；增容剂HIPS-g-PMMA对HIPS／PVC共混体系表现出较好的增容效果，共混物的拉伸强度、屈服强度及断裂伸长率明显增加，冲击强度增大，电镜照片显示两相界面变得更加模糊。     

快固化、无收缩特种MMA-R17树脂在设备基础灌浆,锚固及修补中应用

本文介绍国外聚合物砂浆的性质和应用、施工配比及物理机械性能，供设计人员参考。     

Experimental deformation analysis of an adhesively bonded multi-material joint for marine applications

The strength and deformation of full-scale adhesively bonded multi-material joints is studied in this paper. Four joints with a thick layer of methyl methacrylate adhesive (MMA) have been manufactured in shipyard conditions. In two specimens, cracks have been introduced at steel–adhesive and composite–adhesive interfaces. One cracked and one un-cracked specimen were subjected to quasi-static tensile testing; the two remaining specimens were stepwise loaded/unloaded with increasing load until failure. The strain in the adhesive layers was measured with digital image correlation (DIC). This showed a predominant shear deformation and dissimilar shear strain patterns for different bond lines. Fibre Bragg (FBG) sensors were used to monitor strains at steel and composite constituents and to detect the onset and evolution of damage in the un-cracked specimen. Strains measured by FBG sensors correspond well with DIC results at nearby regions. All specimens failed by delamination of the composite panel near the composite–adhesive interface.     

基于MMA7261的运输包装环境监测系统

本文介绍了加速度传感器MMA7261的工作原理、结构及功能,设计了基于MMA7261三轴加速度传感器的运输包装环境监测系统,详细叙述了该系统的硬件结构、软件设计和应用前景。     

HEMA共聚物水凝胶中水的存在状态

用过氧化二苯甲酰(BPO)作为引发剂，合成了N-乙烯基吡咯烷酮(NVP)／甲基丙烯酸β-羟乙酯(HEMA)和NVP/HEMA／甲基丙烯酸甲酯(MMA)共聚物水凝胶，用差热扫描量热法(DSC)和热重法(TG)对这些亲水凝胶中吸附水的状态进行了研究．结果表明，水凝胶中水的状态大致可分为自由水、可冻结的结合水和非冻结的结合水．不同用量的MMA与NVP和HEMA共聚，溶胀度不同，其吸附水中不同状态水的含量也有所差异，结果表明，随着MMA含量的增加，水凝胶中非冻结结合水的含量也增加。     

氯代仲丁烷引发甲基丙烯酸甲酯的原子转移自由基聚合

讨论了氯代仲丁烷(SBC)为引发剂、氯化亚铁/三苯基膦为催化剂,在AlCl3存在下甲基丙烯酸甲酯(MMA)的原子转移自由基聚合反应.SBC/FeCl2/PPh3引发体系的活性在AlCl3存在下有较大提高,反应时间为120h,单体转化率可达62%,未加入AlCl3时单体转化率仅为17%.聚合速率与单体浓度呈一级关系,体系自由基浓度为2.17×10-9mol/L.聚合物分子量55000,分子量分布1.62,分子量随转化率呈线性增加.经对聚合产物H-NMR谱分析得出在聚合物端基存在引发剂碎片,表明此反应经历了典型的ATRP过程.AlCl3的利用率为20%.     

γ辐射玉米淀粉-MMA固相接枝的研究

利用^60Co—γ射线，研究了玉米原淀粉与甲基丙烯酸甲酯（MMA）在室温和剂量率为125Gy／min条件下的固相共辐射接枝反应，考察了辐照剂量、多羟基的小分子反应介质和单体配比等因素对接枝率G、接枝效率GE和单体转化率C的影响，并用红外光谱方法鉴定了淀粉-MMA接枝共聚物的结构。结果表明，当辐照剂量≤5kGy时，G、GE和C随辐照剂量的增加而提高；当辐照剂量为5kGy～50kGy时，辐照剂量对C几乎无影响；水和乙二醇对CS接枝MMA反应有显著的促进作用，而甘油的促进作用甚微。