3，3-二甲氧基-2-甲基-丙酸甲酯的合成

研究了甲基丙烯酸甲酯的加溴、脱溴化氢的反应，它与通常脱溴化氢的反应不同，它是先脱去一分子的溴化氢，接着是甲醇钠的亲核加成脱溴，再加一分子的甲醇．得到总收率为71．6％的3，3-二甲氧基-2-甲基-丙酸甲酯．     

Study on Soap-free P（MMA-EA-AA/MAA） Latex Particles With Narrow Size Distribution

In the past decades, more and more studies have been focused on the synthesis of monodisperse particles with different diameter by special polymerization technique. In 1980＇ s, Ugelstad, et al invented two-step swelling method to prepare monodisperse microsphere with large size more than 1μm. In the following decade, Okubo and his coworkers synthesized monodisperse crosslinked polymer particles above 3μm using one-step dynamic swelling method. New method has been developed to produce particles more than 50 gm in diameter with a standard deviation of less than 2 % . Up to now, most of the monodisperse particles were usually prepared by polymerization of St in the presence of surfactants. In this presentation, sub-micro sized P （MMA-EA-AA/MAA） particles with narrow size distribution were prepared by seeded emulsion polymerization in the absence of any surfactant materials.     

乙烯系单体自由基聚合的阻聚效应(XX)取代哌啶羟胺及其稳定自由基对苯乙烯-甲基丙烯酸甲酯共聚合的影响

研究了２，２，６，６－四甲基－４－羟基哌啶羟胺（ＴＭＨＰＨＡ）和２，２，６，６－四甲基－羟基哌啶－１－氧自由基（ＴＭＨＰＯ）对偶氮二异丁腈（ＡＩＢＮ）６０℃引发的苯乙烯（Ｍ１）－甲基丙烯酸甲酯（Ｍ２）共聚合的行为．结果表明，两种阻聚剂对苯乙烯（Ｓｔ）－甲基丙烯酸甲酯（ＭＭＡ）共聚合均呈现良好的阻聚效应，其中ＴＭＨＰＨＡ略优于ＴＭＨＰＯ；同时观察到Ｓｔ－ＭＭＡ共聚表观活化能和竞聚率表现出的差异．当阻聚剂为２００μｇ时，共聚物组成发生改变，它们的恒比共聚点由对照实验的０．５２９分别变化为０．５４３（ＴＭＨＰＨＡ）和０．５６７（ＴＭＨＰＯ）．     

Water Repellent Finishing on Cotton Fabric via Atom Transfer Radical Polymerization

In order to enhance the water repellence property of cotton fabric, cotton fabric was grafted using hexafluorobutyl methacrylate( HFMT) monomer via atom transfer radical polymerization( ATRP) method. Water repellent cotton fabric was successfully prepared, and characterized by scanning electron microscopy( SEM),Fourier transform infrared spectroscopy( FTIR), and X-ray photoelectron spectroscopy( XPS). The SEM images of the HFMT-treated cotton displayed significant difference from the untreated one. FT-IR characterization of the HFMTtreated cotton indicated that HFMT was successfully grafted onto the surface of the cotton fabric. XPS analysis indicated that the fluorine element of the HFMT-treated cotton existing on the surface of the cotton fabric. The surface contact angle test as well as the water repellence rating test showed that the water repellence of the HFMTtreated cotton fabric was much better than that of the untreated cotton fabric. The surface contact angle of the HFMT-treated cotton fabric could reach( 132. 4 ± 2. 2) °,and the water repellence rating could achieve grade 3. The washing durability of the HFMT-treated fabric was also investigated. The surface contact angle of the HFMTtreated cotton fabric could reach( 121. 1 ± 2. 1) ° after 20 washing times. Furthermore, the whiteness, air permeability, breaking strength,and breaking elongation of the HFMT-treated cotton fabric decreased slightly compared with the untreated cotton fabric.Finally,cotton fabric with good water repellence property and excellent washing durability could be obtained with little effect on the intrinsic properties of cotton fabric.     

Polymerization kinetics and stabilization mechanism of the monodisperse PMMA microspheres

The effects of the concentration of monomer, crosslinking agent, initiator, stabilizer, and the polarity of medium on the polymerization kinetics were investigated. The results show that the rate of polymerization (Rp) and conversion increased with the increase of monomer concentration from 8% to 15% (total mass); the water content in dispersion medium and the initiator 2, 2′ -azobis (isobutyronitrile) (AIBN) concentration increased as well. Rp and conversion decreases with the increase of PVP when it is low, while it increases when it is high. Moreover, PVP plays an important role in microsphere stabilization. The stabilization mechanism was investigated primarily, which involves both adsorbing mechanism and graft mechanism. Within a certain range of crosslinking degree, Rp and conversion increased with the increase of the crosslinker concentration. The effect can be ignored when crosslinker concentration is above 0.3 % (total mass), and the reason was that the monomer can hardly be diffused into the microsphere phase with a certain degree of crosslinking.     

胶晶模板法制备尖晶石型正极材料LiMn2O4

通过聚甲基丙烯酸甲酯(PMMA)胶晶模板法制备尖晶石型LiMn2O4材料,并探讨焙烧温度对材料性能的影响.运用热重分析(TG)、X线衍射(XRD)、扫描电镜(SEM)、充放电测试和循环伏安测试等方法对LiMn2O4样品的结构、形貌以及电化学性能进行表征和测试.研究结果表明:在不同温度下制备的LiMn2O4样品均具有较好的尖晶石型结构,且粒径分布均匀:在700℃时制备的LiMn2O4样品(S-700)具有最佳的电化学性能,在3.0～4.4 V时,0.2C倍率首次放电比容量为130.9 mA·h/g; 0.5C倍率首次放电比容量为126.4 mA·h/g,50次循环之后容量仍有102.7 mA·h/g,具有良好的循环稳定性.     

快速高吸油树脂的合成及吸油性能研究

文中采用分散聚合法合成甲基丙烯酸高碳脂肪醇酯共聚树脂，树脂收率可达９５％，并对其吸油性能进行了研究，平均吸油倍数对甲苯为２０倍，最快饱和吸油时间为１０５ａ。此外还研究了单体种类与比例，交联剂种类及用量、等对高吸油树脂吸油倍数与饱和吸油时间的影响。     

BMA-Eu(AA)3共聚物/TiO2-SiO2杂化膜的制备及荧光性质

采用溶胶-凝胶法制得了甲基丙烯酸丁酯(BMA)-丙烯酸铕(Eu(AA)3)聚物/TiO2-S iO2杂化膜,并用FT-IR、热重分析、荧光光谱及膜综合性能测试对杂化膜的性能进行表征。研究发现TiO2可以增强杂化膜的荧光性质,在Ti∶S i摩尔比为0.2时,薄膜荧光强度可以增大约5倍。     

乙烯系单体自由基聚合的阻聚效应(ⅩⅪ)——羟胺类化合物对苯乙烯—甲基丙烯酸甲酯共聚合的影响

研究了二乙基羟胺（ＤＥＨＡ）、二异丙基羟胺（ＤＩＰＨＡ）和吗啉羟胺（ＭＰＨＡ）对偶氮二异丁腈（ＡＩＢＮ）引发的苯乙烯（Ｍ１）－甲基丙烯酸甲酯（Ｍ２）在６０℃共聚合的行为．结果表明,３种羟胺对Ｓｔ－ＭＭＡ共聚合表现出不同的阻聚功效,它们的阻聚活性次序为ＤＥＨＡ＞ＤＩＰＨＡ＞ＭＰＨＡ．同时观察到Ｓｔ－ＭＭＡ共聚合竞聚率发生变化,随着所用羟胺的浓度加大,Ｓｔ－ＭＭＡ交替共聚合倾向增大．此外还讨论了聚合温度对诱导期、共聚合速率和共聚物组成的影响．