基于甲基丙烯酸（9蒽）甲基酯共聚物为敏感膜的土霉素荧光光纤传感器

将甲基丙烯酸（９蒽）甲基酯与甲基丙烯酸甲酯和丙烯酸乙酯共聚，制备了一种具有荧光的共聚物（ＰＡＭＢ）并基于土霉素（ＯＴＣ）对ＰＡＭＢ共聚物荧光的可逆熄灭作用，研制了一种测定ＯＴＣ的荧光光纤传感器，该传感器对ＯＴＣ的响应具有好的稳定性和可逆性。响应时间和回复时间均小于３０ｓ，在２．０×１０＾－７～２．０×１０＾－４ｍｏｌ／ＬＯＴＣ浓度范围内有良好的线性关系，碱金属，碱土金属离子及常用药物对ＯＴＣ测定没     

甲基丙烯酸二甲氨基乙酯溴代烷季铵盐与苯乙烯共聚合的研究

以甲基丙烯酸二甲氨基乙酯溴代乙烷（ Ｍ Ａ Ｅ Ｂ） 或丁烷（ Ｍ Ａ Ｂ Ｂ） 季胺盐与苯乙烯（ Ｓｔ）为单体,采用溶液自由基共聚合方法,合成了一类新型阳离子两亲共聚物．详细地研究了聚合条件及共聚物的溶解性．共聚物“亲油”和“亲水”单元的无规结构被 Ｉ Ｒ、１ Ｈ Ｎ Ｍ Ｒ 及１３ Ｃ Ｎ Ｍ Ｒ所证实．最后,用线性化（ Ｙ Ｂ Ｒ） 法分别求得 Ｍ Ａ Ｅ Ｂ／ Ｓｔ 和 Ｍ Ａ Ｂ Ｂ／ Ｓｔ 的单体竞聚率,ｒ Ｍ Ａ Ｂ Ｂ ＝０４４ ,ｒ Ｓｔ ＝ ０１５ ,ｒ Ｍ Ａ Ｅ Ｂ＝ ０６６ ,ｒ Ｓｔ＝ ０３６ ．     

聚环氧丙烷聚氨酯／聚（甲基丙烯酸甲酯—苯惭烯）IPN的研究

改变聚（甲基丙烯酸甲酯－苯乙烯（Ｐ（ＭＭＡ－ｃｏ－Ｓｔ）中 甲基丙烯酸甲酯的含量（ＷＭＭＡ），通过一步法合成出聚环氧氯丙烷聚氨酯（ＰＵ（ＰＥＣＨ）／Ｐ（ＭＭＡ－ｃｏ－Ｓｔ）ＩＰＮ．ＤＳＣ、ＴＥＭ和动态粘弹谱研究结果表明：当Ｐ（ＭＭＡ＿ｃｏ－Ｓｔ）中ＷＭＭＡ大于０．６时，ＩＢＮ仅有一个Ｔｇ；当ＷＭＭＡ小于０．４时，ＩＰＮ有２个Ｔｇ，ＴＥＭ上出现相区，Ｐ（ＭＭＡ－ｃｏ－Ｓｔ）深度参数（δ）及δ的氢键作     

聚环氧氯丙烷聚氨酯／聚（甲基丙烯酸甲酯－苯乙烯）IPN的研究

改变聚（甲基丙烯酸甲酯－苯乙烯）（Ｐ（ＭＭＡ－ｃｏ－Ｓｔ）中甲基丙烯酸甲酯的含量（Ｗ_（ＭＭＡ）），通过一步法合成出聚环氧氯丙烷聚氨酯（ＰＵ（ＰＥＣＨ）／Ｐ（ＭＭＡ－ｃｏ－Ｓｔ）ＩＰＮ．ＤＳＣ、ＴＥＭ和动态粘弹谱研究结果表明：当Ｐ（ＭＭＡ－ｃｏ－Ｓｔ）中Ｗ_（ＭＭＡ）大于０．６时，ＩＰＮ仅有一个Ｔｇ；当Ｗ_（ＭＭＡ）小于０．４时，ＩＰＮ有２个Ｔ_ｇ，ＴＥＭ上出现相区，Ｐ（ＭＭＡ－ｃｏ－Ｓｔ）溶度参数（δ）及δ的氢键作用分量（δｈ）与相态、力学性能有密切关系。     

离聚物及其共混体系的研究 Ⅰ．聚合物链引入同种离子的增容作用

通过苯乙烯（Ｓ）及甲基丙烯酸正丁酯（ｎＢｍａ）分别与少量的甲基丙烯酸（Ｍａａ）和马来酸酐（Ｍａｎ）共聚，从而在聚苯乙烯（ＰＳ）及聚甲基丙烯酸丁酯（ＰＢｍａ）链上分别引入了功能基因羧酸基和酸酐基，制得共聚物ＳＭａａ、ＢｍａＭａａ、ｓＭａｎ及ＢｍａＭａｎ．通过将这些共聚物分别交换上金属离子制备得相应的离聚物（Ｉｏｎｏｍｅｒ）及其共混物．红外光谱（ＩＲ）、差示扫描量热法（ＤＳＣ）及透射电镜（ＴＥＭ）的研究结果表明，共混物两组分均具有同种（负）电荷时，仍表现明显的增容作用．     

离聚物及其共混体系的研究 Ⅰ．聚合物链引入同种离子的增容作用

 通过苯乙烯（Ｓ）及甲基丙烯酸正丁酯（ｎＢｍａ）分别与少量的甲基丙烯酸（Ｍａａ）和马来酸酐（Ｍａｎ）共聚，从而在聚苯乙烯（ＰＳ）及聚甲基丙烯酸丁酯（ＰＢｍａ）链上分别引入了功能基因羧酸基和酸酐基，制得共聚物ＳＭａａ、ＢｍａＭａａ、ｓＭａｎ及ＢｍａＭａｎ．通过将这些共聚物分别交换上金属离子制备得相应的离聚物（Ｉｏｎｏｍｅｒ）及其共混物．红外光谱（ＩＲ）、差示扫描量热法（ＤＳＣ）及透射电镜（ＴＥＭ）的研究结果表明，共混物两组分均具有同种（负）电荷时，仍表现明显的增容作用．     

乙烯系单体自由基聚合的阻聚效应──XIX．取代哌啶羟胺和二叔丁基羟胺及其稳定自由基对苯乙烯－丙烯腈共聚合的影响

研究了二叔丁基羟胺（ＤＴＢＨＡ），二叔丁基氮氧自由基（ＤＴＢＮＯ·），２，２，６，６－四甲基－４－羟基哌啶羟胺（ＴＭＨＰＨＡ）和２，２，６，６－四甲基－４－羟基哌啶－１－氧自由基（ＴＭＨＰＯ·）对过氧化苯甲酰（ＢＰＯ）６０℃引发的苯乙烯（Ｍ１）－丙烯腈（Ｍ２）共聚合的阻聚行为．结果表明，这些阻聚剂对Ｓｔ－ＡＮ共聚均表现良好的阻聚行为，其中氮氧自由基优于相应羟胺．同时观察到Ｓｔ—ＡＮ竞聚率的改变，羟胺使ｒ１有所降低，ｒ２略有增大．但相应的氮氧自由基是相反结果．阻聚剂为２００ｐｐｍ时，共聚物中的恒比共聚点由对照实验的０．６１９变化为０．５３３，０．６４５，０．５８９和０．６９８相对于ＤＴＢＨＡ，ＤＴＢＮＯ·，ＴＭＨＰＨＡ和ＴＭＨＰＯ·．     

聚丙烯酸酯无皂水溶胶阻尼涂料动态力学性能的研究

用分步溶液聚合法合成了两种丙烯酸酯共聚物的共混物［Ｐ（ＢＡ－ＨＥＭＡ－ＡＡ）／Ｐ（ＭＭＡ－ＨＥＭＡ－ＡＡ）Ａ］，制成无皂水溶胶，加入交联剂配成涂料。两种共聚物既可相互贯穿缠结，又可通过交联剂交联，使涂膜同时具有物理交联和化学交联。用动态力学分析法（ＤＭＡ）、扭辫分析法（ＴＢＡ）考察了涂膜的动态力学性能，表明涂膜具有ＩＰＮ结构，并有良好的阻尼性能。     

甲基丙烯酸甲酯和联苯酯的基团转移共聚研究

研究了甲基丙烯酸甲酯（ＭＭＡ）和甲基丙烯酸联苯酯（ＢＰＭＡ）的基团转移共聚．用１Ｈ ＮＭＲ、ＩＲ、ＧＰＣ和ＤＳＣ等手段对共聚物进行了表征．测得两种单体在苯、四氢呋喃和乙腈中的竞聚率（３０℃）分别为γ１＝０５６±００３、０５２±００３、０４６±００３和γ２＝０７９±００３、０８１±００３、０８５±００３．得到了实测分子量和理论分子量相近，分散性较小的共聚物     

异戊二烯/甲基丙烯酸甲酯嵌段共聚物的合成与微结构研究

用稀土催化剂ＲＥ（Ｐ２０４）３ （ｉ Ｂｕ）３Ａｌ ＢｒＣＨ２ＣＨ２Ｂｒ（ＲＥ＝Ｎｄ,Ｐｒ,Ｙ等）合成嵌段共聚物Ｐ（ＩＰ ｂ ＭＭＡ）．系统考察了共聚合反应特征,以ＤＳＣ,１Ｈ ＮＭＲ,１３Ｃ ＮＭＲ技术研究了该嵌段共聚物的微结构．发现以二溴乙烷为添加剂的稀土催化体系是制备Ｐ（ＩＰ ｂ ＭＭＡ）的良好催化剂,共聚物含２个玻璃化转变温度,分别为－７５６℃和１２９℃,嵌段共聚物的结构规整,（ＩＰ）ｍ段以ｃｉｓ １,４结构为主,其含量为９７％左右,３,４ 结构为３％左右,链节间以头 尾方式连接．（ＭＭＡ）ｎ段以间同立构为主,其含量达７４％．     

甲基丙烯酸二环己基苯甲酯的合成

以溴代环己烷和苯甲酸乙酯为原料,经过两步反应合成了甲基丙烯酸二环己基苯甲酯．探讨了影响反应的各种因素,找到了较好的合成条件．     

Homopolymerization of Ethyl Methacrylate

The kinetics of polymerization of ethyl methacrylate initiated by manganese (III) in sulfuric acid have been investigated. The overall rates of polymerization (R_p), disappearance of manganic ion (-R_m), and degree of polymerization (X _n) were measured with variation in [monomer], [Mn³⁺], [H⁺], μ, and temperature. Various rate parameters and thermodynamic parameters were evaluated and are discussed.     

甲基丙烯酸二烷氨基乙酯的合成

采用直接酯缩合的方法,以甲基丙烯酸为原料合成了两种长链取代的甲基丙烯酸二烷氨基乙酯化合物。通过条件优化确定最佳反应条件为n(甲基丙烯酸) ：n(二取代乙醇胺) ：n(DMAP) ：n(EDCI)=1.01：1.00：0.20：1.01,在该反应条件下,室温反应12 h合成甲基丙烯酸N-十二烷基-N-甲氨基乙酯和甲基丙烯酸-N-十六烷基-N-甲氨基乙酯,产率分别为93%和91%。     

甲基丙烯酸缩水甘油酯与甲基丙烯酸氯乙酯共聚反应竞聚率的研究

本文合成了甲基丙烯酸缩水甘油酯、甲基丙烯酸氯乙酯和甲基丙烯酸缩水甘油酯与甲基丙烯酸氯乙酯共聚物。用~1H-NMR谱仪测定了共聚物中两种单体的含量。用Fineman-Ross和Kelen-Tilds两种作图方法以及最小二乘法对单体的竞聚率进行估假。结果表明了甲基丙烯酸氯乙酯的竞聚率(r_1)和甲基丙烯酸缩水甘油酯的竞聚率(r_2)分别为r_1=0.712,r_2=1.081。     

Mechanical Properties of Copolymers from Methacrylate Functionalized Silanes and Bifunctional Methacrylate Monomers

Sol gel derived composite materials were prepared from methacryloxypropyltrimethoxysilane (MPTS) and tetraethyleneoxidedimethacrylate (TEGDMA). The amount of MPTS in the composites was varied from 0 to 50 mole%. MPTS was prehydrolyzed at room temperature with 0,1 mole/l HCl/H₂O. After complete removal of solvent calculated amounts of TEGDMA were added to the reaction mixture of the prehydrolyzed MPTS. Thermically initiated free radical copolymerization of the methacrylate endgroups was performed in the resulting mixture under nitrogen atmosphere using azobisisobutyronitril (AIBN) as initiator. The composites were investigated by high resolution transmission electronmicroscopy in order to investigate the morphology. The thermomechanical properties as storage, loss modulus, tan as well as the glass transition temperature (T _g ) of the composites were estimated by dynamic mechanical thermal analysis (DMTA).     

甲基丙烯酸甲酯和长链烷基酯的嵌段共聚

甲基丙烯酸甲酯和长链烷基酯的嵌段共聚戴李宗＊邹友思郭金泉潘容华（厦门大学化学系厦门３６１００５）关键词阴离子聚合，甲基丙烯酸酯，嵌段共聚合，表征１９９６－０８－０７收稿，１９９６－１１－１８修回国家自然科学基金资助项目嵌段共聚合能得到具微相体系的共聚...     

Dielectric Relaxation of Methyl Methacrylate and Ethyl Methacrylate on Complexation with Phenols

Dielectric absorption studies of H-bonded complexes of methyl methacrylate (MMA) and ethyl methacrylate (EMA) with p-cresol, p-chlorophenol, 2,4-dichlorophenol, and p-bromophenol were studied at microwave frequency 9.37 GHz in dilute solution of carbon tetrachloride at 308 K. Different dielectric parameters like dielectric constantε′ and dielectric loss ε″ at microwave frequency, static dielectric constant ε_0 and dielectric constant ε_∞ at optical frequency were determined. The validity of the single frequency equation of Higasi et al. for multiple relaxation time τ_(1) was found to be a function of the hydrogen bonding strength of phenolic hydrogen, whereas the group rotation relaxation time τ_(2) was a function of the steric interaction of proton donor. The relaxation time was the maximum at 50∶50 (molar ratio) of methacrylates with phenols.     

甲基丙烯酸甲酯、甲基丙烯酸乙酯与酚络合的介电驰豫行为

Dielectric absorption studies of H-bonded complexes of methyl methacrylate (MMA) and ethyl methacrylate (EMA) with p-cresol, p-chlorophenol, 2,4-dichlorophenol, and p-bromophenol were studied at microwave frequency 9.37 GHz in dilute solution of carbon tetrachloride at 308 K. Different dielectric parameters like dielectric constant ε' and dielectric loss ε' at microwave frequency, static dielectric constant ε0 and dielectric constant ε∞ at optical frequency were determined. The validity of the single frequency equation of Higasi et al. for multiple relaxation time τ(1) was found to be a function of the hydrogen bonding strength of phenolic hydrogen, whereas the group rotation relaxation time τ(2) was a function of the steric interaction of proton donor. The relaxation time was the maximumat 50:50 (molar ratio) of methacrylates with phenols.     

膦腈碱催化甲基丙烯酸烯丙酯与甲基丙烯酸甲酯的负离子共聚反应

室温下以膦腈碱(t-Bu P4)为催化剂,催化甲基丙烯酸烯丙酯(AMA)和甲基丙烯酸甲酯(MMA)进行负离子共聚反应.用核磁(1H-NMR、13C-NMR)、红外光谱(FTIR)、凝胶渗透色谱(GPC)、示差扫描量热仪(DSC)和热失重分析仪(TGA)等对聚合物结构和性能进行表征.结果发现,t-Bu P4能在室温下成功催化AMA与MMA的共聚反应,一步法合成结构可控的含悬垂双键共聚物.共聚反应中单体AMA和MMA的转化率均高于90%,且无交联或凝胶生成.通过NMR和FTIR对聚合物进行结构分析表明,AMA单体仅甲基丙烯酸酯双键参与聚合反应,烯丙基双键不参与聚合反应、无交联反应、环化反应等.聚合物中烯丙基结构单元的含量可通过体系中AMA/MMA的投料比调节.GPC结果表明所得共聚物分子量可控且分子量分布较窄.TGA和DSC结果表明,共聚物的热分解温度升高,玻璃化温度降低.     

Redox-Initiated Polymerization of Methyl Methacrylate

The redox-initiated polymerization of methyl methacrylate (MMA) by the Ce(IV)-malic acid system has been carried out in aqueous medium under an inert atmosphere. The rate of polymerization was found to be proportional to [MMA]^3/2 [MA]^1/2 [Ce(IV)]^1/2 and the rate of ceric ion disappearance was proportional to [Ce(IV)] but independent of [MMA]. The rate increased linearly up to a certain range of [MA], above which it remained constant. Increasing [H₂SO₄] decreased the rate. The activation energy was found to be 57.44 kJ/mol.