α-甲基丙烯酸十一烯酯的合成

以α-甲基丙烯酸和十一烯醇为原料,对甲苯磺酸催化下,n（α-甲基丙烯酸）/n（十一烯醇）=2.5,温度控制在110～l20℃加热回流,反应时间8 h,合成了α-甲基丙烯酸十一烯酯,其产率达到88.3%。酯化产物经红外光谱测定,证明所得产物为α-甲基丙烯酸十一烯酯。     

新型聚羧酸系减水剂大分子的合成与性能研究

以甲基丙烯酸、聚乙二醇为主要原料，以甲苯为带水剂、混酸为催化剂，对苯二酚为阻聚剂，通过酯化反应合成出甲基丙烯酸聚乙二醇单酯活性大单体。确定出最佳反应条件为：原料醇酸物质的量比为1：2，催化剂的用量为4％（以聚乙二醇的质量计），阻聚剂对苯二酚的用量为0．3％（以甲基丙烯酸的质量计），温度为95℃，反应时间为8h，合成出活性大单体的酯化率可高达86．4％。产品经酯化率的测定和IR结构表征，证明是目标产物。     

(甲基)丙烯酸双环戊烯基酯的除臭研究

提出了一种消除ＤＣＰ（ 双环戊二烯） 与ＤＣＰ（Ｍ） Ａ （ 甲基丙烯酸双环戊烯基酯） 恶臭的新方法。     

羟化含氟嵌段共聚物的合成及其自组装行为研究

用α-溴代丙酸乙酯（EPN—B）／氯化亚铜（CuCl）／联二吡啶（bpy）作为催化引发体系,环己酮为溶剂,进行甲基丙烯酸2,2,2-三氟乙酯（TFEMA）的原子转移自由基聚合（ATRP）,得到单分散PTFEMA—X预聚体。并以此预聚体为大分子引发剂引发甲基丙烯酸-β-羟乙酯聚合,得到分子质量可控、分子质量分布窄的聚甲基丙烯酸2,2,2-三氟乙酯-b-聚甲基丙烯酸-β-羟乙酯嵌段共聚物,用FTIR、^1H—NMR、GPC等对产物的结构与性能进行了表征。同时利用动态激光光散射（DLS）对嵌段共聚物的自组装行为进行了研究。     

AMA—MMA共聚物性能研究

合成了甲基丙烯酸烯丙ＡＭＡ－甲基丙烯酸甲酯（ＭＭＡ）共聚物。采用紫外一可见光谱仪，阿贝折光指数仪，硬度计及差支义研究了甲基丙烯酸内酯一甲基丙烯酸甲醌共聚笔折物性。     

微波辐照下甲基丙烯酸甲酯（MMA）聚合的研究

本文研究在微波辐照下甲基丙烯酸甲脂（ＭＭＡ）在低转化阶段的聚合特征，实验给出在微波辐照下ＭＭＡ的聚合速率有显著的提高，回归分析给出了ＭＭＡ在微波辐照下的聚合模拟动力学方程。     

甲基丙烯酸十二酯的合成及表征

以甲基丙烯酸(MA)和十二醇(LA)为原料,对甲苯磺酸为催化剂,对苯二酚为阻聚剂,甲苯为带水剂,采用直接酯化法制备了甲基丙烯酸十二酯。通过研究原料的配比、催化剂用量、阻聚剂用量、带水剂用量等对酯化反应酯产率的影响,得到了制备甲基丙烯酸十二酯的最佳工艺配方。实验表明,在140℃下,当n(MA)∶n(LA)=2∶1,对甲苯磺酸质量分数为1.5%,对苯二酚质量分数为0.06%,甲苯质量分数为50%时,反应4h,酯化反应的酯产率达到98.02%。碱的强弱对酯收率影响不大。通过红外光谱分析,酯化反应产物为甲基丙烯酸十二酯。     

超支化聚合物的研究及应用

以二异丙醇胺（DIPA）及酸酐为原料合成了含有一个羧基、两个羟基的AB2型单体,采用AB2型单体自缩聚的方法合成了超支化聚酰胺酯,然后用甲基丙烯酸对超支化聚酰胺酯的端基功能改性。然后将超支化单体与马来酸酐、甲基丙烯酸共聚合成阻垢分散剂。     

乙烯基酯树脂的合成及性能

以双酚Ａ型环氧树脂与甲基丙烯酸为原料合成了乙烯基酯树脂、论述了反应温度、催化剂用量对反应收率和产物性能的影响,并用ＴＤＩ、ＭＤＩ进行改性,对其性能进行了测试。     

甲基丙烯酸β—羟乙酯的合成研究

以十六烷基三甲氢氧化铵为催化剂和苯二酚为阻聚剂，由甲基丙烯酸甲酯和乙二醇合成了甲基丙烯酸β－羟乙酯，通过正交试验获得了最佳反应条件，反应温度１００℃～１１０℃，反应时间２．５ｈ，酯醇摩尔比１：１．５，催化剂用量为９．０ｍｌ，ＨＥＭＡ的产率为９２．３％。     

硫酸氢钠催化合成二甲基丙烯酸新戊二醇酯

以甲基丙烯酸和新戊二醇为原料、硫酸氢钠为催化剂高效合成了二甲基丙烯酸新戊二醇酯，考察了影响酯收率的各种因素，确定最佳反应条件n(甲基丙烯酸)∶n(新戊二醇)=2.3∶1;催化剂用量7.5%（占新戊二醇质量分数），带水剂环己烷用量60%，阻聚剂对苯二酚用量0.625%，反应温度（110～115） ℃，反应时间2.0 h，酯收率可达94%以上。比较了不同催化剂的催化活性，结果表明，硫酸氢钠具有催化活性好、可重复利用、不腐蚀设备和环境污染小等优点，是合成二甲基丙烯酸新戊二醇酯的优良催化剂。     

酯交换法合成一缩二乙二醇双甲基丙烯酸酯

以一缩二乙二醇和甲基丙烯酸甲酯为主要原料,以二丁基氧化锡为催化剂,酯交换合成一缩二乙二醇双甲基丙烯酸酯。考察了甲基丙烯酸甲酯与一缩二乙二醇摩尔比、催化剂用量及阻聚剂用量等因素对收率的影响。得出了最佳的反应条件：甲基丙烯酸甲酯与一缩二乙二醇的摩尔比为3．5：1,反应温度为回流温度,催化剂二丁基氧化锡及阻聚剂氮氧自由基的加入量分别为一缩二乙二醇质量的3％及0．1％。在此工艺条件下收率可达到97．5％。     

Synthesis,morphology, component distribution,and mechanical properties of nitrocellulose/gradient poly(ethylene glycol dimethacrylate) semi‐IPN material

Nitrocellulose (NC), a rigid natural polymer, was modified by gradient interpenetrating polymer networks containing poly(ethylene glycol dimethacrylate) (PEGDMA) to obtain both high strength and large toughness across the thickness from surface to the core of samples. PEGDMA content decreased with distance from the surface to core of nitrocellulose with a gradient of poly(ethylene glycol dimethacrylate) (NC/grad. PEGDMA) determined by elemental chemical analysis. The distribution of the guest component across the NC/grad. PEGDMA semi‐IPNs sample thickness was reciprocal function. SEM micrographs of NC/grad. PEGDMA semi‐IPNs revealed that, when the content of guest component was about 23%, the gradient system showed almost single phase morphology. At the same time, the tensile test results showed that NC/grad. PEGDMA featured both higher tensile strength and larger toughness. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007     

Synthesis and characterization of highly porous poly(methacrylic‐co‐triethylene glycol dimethacrylate) by suspension polymerization

Porous poly(methacrylic‐co‐triethyleneglycol dimethacrylate) (MAA‐3G) was prepared by suspension polymerization using benzoyl peroxide as an initiator, poly(vinyl alcohol) as a protective colloid, and n‐hexane as a porogenic agent. The prepared polymer was base hydrolysed using hydroxyl amine and sodium methoxide into the corresponding polyhydroxamic acid (HYOX). The metal binding behavior of polyhydroxamic acid with various metal ions, the effect of pH on the metal ion capturing, and the selectivity of the resin towards the different metal ions were also examined by means of atomic absorption spectrophotometer. The thermal stability of the prepared base‐hydrolysed polymer and the metal polymer complex was examined by thermal gravimetric analysis (TGA) and differential scanning calorimeter (DSC). The prepared porous polymer methacrylic‐co‐triethyleneglycol dimethacrylate and its different modulated forms were characterized by means of FTIR specroscopy and scanning electron microscope. The hydroxamic acid content was also examined by elemental analysis. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 73: 149–159, 1999     

Simultaneous synthesis of dimethyl carbonate and ethylene glycol dimethacrylate using homogenous basic catalyst

A novel method simultaneously to prepare dimethyl carbonate and ethylene glycol dimethacrylate from ethylene carbonate and methyl methacrylate has been demonstrated in the presence of catalyst sodium methoxide and polymerization inhibitor ZJ-705. The effect of reaction parameters such as catalyst loading, polymerization inhibitor loading, concentration of reactants, reaction time, etc., on synthesis of dimethyl carbonate and ethylene glycol dimethacrylate was investigated. A reaction mechanism has been discussed with catalyst sodium methoxide.     

Dilute gelling systems: copolymers of styrene and glycol dimethacrylates

Gelation properties of the copolymers of styrene with various proportions of ¹⁴C labelled ethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate and polyethylene glycol (MW = 400) dimethacrylate have been studied. The thermal copolymerizations were carried out in 15% (v/v) solution in toluene. The rates of polymerization were found to increase with larger proportions of dimethacrylate cross-linking agents. The conversion at the gel point was surprisingly constant over a wide range of crosslinker concentration. The fraction of crosslinker saturated at both ends was found to increase in the order ethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate and polyethylene glycol 400 dimethacrylate. The proportion of completely reacted crosslinker increased only slowly with conversion. At very high concentrations of crosslinker, the onset of inhomogeneity was observed as described previously by Storey³ and Dusek¹⁸.     

Comparison of mechanical and degradation properties of EG and EGDMA grafted gelatin films

Thin films of gelatin were prepared from gelatin granules in aqueous medium by casting and its mechanical properties like tensile strength (TS), tensile modulus (TM), and elongation at break (Eb %) were studied. Gelatin films were procured with two types of monomers such as 5% ethylene glycol (EG) and 5% ethylene glycol dimethacrylate (EGDMA) to increase the mechanical properties. Five percent of monomer solutions were prepared in MeOH along with 2% photoinitiator; Irgacure-651. Soaking time and UV radiation intensities were optimized with the extent of polymer loading (PL) and the mechanical properties of the cured films. Comparing the properties of EG and EGDMA treated gelatin film, EG showed the best performance. The EG-cured gelatin film with 5?min soaking time showed the highest tensile strength (58.6?MPa) and elongation at break (11.2%). The water uptake was determined for raw film (500.1%), EG grafted gelatin film (375.3%), and EGDMA grafted film (412.9%). The degradation properties in water and soil were determined for the raw and cured gelatin films. It was observed that the raw film degrades more than that of the treated films.     

Ionic liquids as catalytic additives for the acceleration of the photopolymerization of poly(ethylene glycol dimethacrylate)s

BACKGROUND: The fast development of practical applications of photopolymerizable compositions (PPCs) leads to a growing demand for the elaboration of novel monomers and simultaneously for the investigation of three‐dimensional polymerization mechanisms including the possible influence of initiator, additives, etc. The aim of the current study is to explore and clarify the role of ionic liquids (ILs) as environmentally friendly catalytic additives in the photopolymerization of poly(ethylene glycol dimethacrylate)s. RESULTS: The photopolymerization of triethylene glycol dimethacrylate (TEGDM) and poly(ethylene glycol‐400 dimethacrylate) (PEGDM) in the presence of various ILs both imidazolium‐based, i.e. [1‐methyl‐3‐alkylim]⁺ (CF₃SO₂)₂N^? (im = imidazolium; alkyl = C₂H₅, C₄H₉, C₁₄H₂₉), and phosphonium‐based, i.e. [P⁺ (C₆H₁₃)₃(C₁₄H₂₉)]X^? (X^? = PF₆^?, BF₄^?, (CF₃SO₂)₂N^?, Cl^?), as catalytic additives was investigated. The influence of the concentration of the ionic salts as well as the nature of the ILs upon the photopolymerization was studied in detail. It was found that imidazolium ILs accelerate TEGDM photopolymerization and suppress the polymerization of PEGDM. In contrast, polymerization of PEGDM with extra small amounts of phosphonium ionic solvents proceeded at a high rate and offered access to new polymers and the utilization of low‐reactivity monomers in PPCs. CONCLUSION: The most striking advantage is that the use of certain ILs permits the control of polymerization rate to achieve maximum oligomer conversion. Copyright © 2007 Society of Chemical Industry     

红霉素分子印迹聚合物纳米微球的制备及其吸附特性

以红霉素为模板分子、甲基丙烯酸为功能单体、乙二醇二甲基丙烯酸酯为交联剂,采用沉淀聚合法制备了粒径均一的红霉素纳米分子印迹聚合物微球,优化了分子印迹聚合物的合成条件,确定了模板分子与功能单体的最佳摩尔比为1:3,对其进行了表征. 结果表明,所制聚合物对红霉素的实际最大吸附量可达202.12 mg/g,吸附约200 min达到平衡,对红霉素具有良好的选择性吸附能力.     

Synthesis of shrinkage‐controlled acrylic copolymers

Acrylic copolymer systems consisting of methyl methacrylate and triethylene glycol dimethacrylate with different chemical compositions were synthesized through bulk polymerization using N,N‐dimethyl‐p‐toluidine as an acelerator to obtain nonshrinkable polymers. The use of the tertiary amine on this formulation produces an increase on the volume of the material due to a phase separation in the copolymer, which compensates the volume reduction upon curing. The specific volumes of all materials were determined by volume dilatometry using a dilatometer specially constructed for this purpose. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 586–591, 2000