三元共聚吸油树脂的合成及其在处理炼油废水中的应用

以甲基丙烯酸酯及苯乙烯为单体,过氧化苯甲酰为引发剂,采用悬浮聚合法合成自溶胀型的高吸油性树脂.研究了交联剂及分散剂的种类、引发剂用量、聚合温度、单体配比等因素对高吸油性树脂吸油性能的影响,所合成的高吸油树脂可吸自重15倍以上的苯、14倍以上的二甲苯,处理炼油废水浮油非常有效,且吸油后树脂强度高,可以脱油后莺复使用.     

甲基丙烯酸酯高吸油性树脂的合成与性能

以甲基丙烯酸酯为单体,二乙烯苯为交联剂,过氧化二苯甲酰为引发剂,采用悬浮聚合法合成了高吸油性树脂。研究了单体结构、引发剂用量、交联剂用量对树脂性能的影响。所制树脂可以吸收自身重量19.2倍的甲苯、13.6倍的煤油、5.4倍的机油。     

高吸油性树脂的合成及性能研究

以甲基丙烯酸甲酯和丙烯酸丁酯为主要单体，采用悬浮聚合法合成了低交联度的高吸油性树脂，考察了单体配比，交联剂，引发剂，分散剂用量对树脂吸油性能的影响。     

一种高吸油性树脂的合成工艺及性能研究

采用悬浮聚合法,以水为分散相,甲基丙烯酸十二酯(DMA)为长链单体,苯乙烯(St)为短链单体,二乙烯基苯(DVB)为交联剂,过氧化苯甲酰(BPO)为引发剂,合成了低交联度的高吸油性树脂,研究了单体配比、引发剂用量、交联剂用量对树脂性能的影响,测定了树脂的DSC-TG曲线,以及树脂吸油前后的SEM形貌表征。结果表明:合成的高吸油性树脂吸油效果较为理想,其中对甲苯的吸收倍率可达到7.03g/g,煤油的吸收倍率可达到6.59g/g,航空煤油的吸收倍率可达到6.12g/g,并且树脂具有良好的热稳定性。     

高吸油树脂性能与再生的研究

采用悬浮聚合的方法合成一种交联适中的聚丙烯酸系高吸油性树脂。研究了单体组成及配比,引发剂用量和交联剂用量对树脂吸油性能的影响,并且对树脂的再生进行了研究。实验结果表明:当m(甲基丙烯酸十二酯):m(苯乙烯)为2:3,引发剂用量为单体质量的1%,交联剂用量为单体质量的1%时,吸油效果最为理想;通过乙醇溶剂萃取法进行再生脱油率可达92.3%。     

快速高吸油性丙烯酸酯树脂的合成研究

以丙烯酸丁酯与甲基丙烯酸甲酯为共聚单体，在聚合体系中引入致孔剂和大分子增容剂，采用悬浮聚合法合成了快速高吸油性树脂，考察了致孔剂用量、增容剂用量、乙酸乙酯／异戊醇混合致孔剂质量比等对高吸油性树脂吸油性能的影响。结果表明：通过引入致孔剂乙酸乙酯，不仅使树脂对甲苯和汽油的吸油率分别达到了3300％和1000％，而且吸油速度加快，2h内可达到饱和吸油；在致孔的基础上引入增容剂，可使树脂对汽油的吸收率显著提高，达到了1500％。     

微乳液聚合制备丙烯酸酯类高吸油性树脂工艺条件的探讨

微乳液以二乙二醇二丙烯酸酯为交联剂,过氧化苯甲酰(BPO)为引发剂,采用热引发技术合成了高吸油性树脂。较详细地讨论了合成树脂过程中的反应温度、时间、交联剂的种类及用量等工艺因素对合成树脂的吸油率和吸油速率的影响,从而得出热引发合成高吸油性树脂的最佳工艺条件。     

乳液聚合制备丙烯酸酯类吸油树脂及其性能研究

采用乳液聚合,以甲基丙烯酸月桂酯,甲基丙烯酸丁酯和甲基丙烯酸甲酯为单体,二乙烯基苯为交联剂,过硫酸铵为引发剂,合成了丙烯酸酯类高吸油树脂。研究了乳化剂、引发剂、交联剂用量,单体配比对吸油树脂性能的影响。     

丙烯酸酯类高吸油树脂的合成

采用悬浮聚合法,以甲基丙烯酸十六酯为单体,合成了丙烯酸酯类高吸油树脂。研究了不同的交联剂、引发剂、分散剂以及反应温度和时间对高吸油性树脂吸油率的影响,并且考察了高吸油树脂对不同油品的吸油性能。结果表明,在反应温度为70℃,反应时间为6h,二乙烯苯(DVB)为交联剂,过氧化苯甲酰(BPO)为引发剂,聚乙烯醇(PVA)为分散剂,且当DVB、BPO、PVA占单体混合物质量分数分别为1.0%、1.2%、0.8%时,所合成的树脂的吸油性能较好,树脂对四氯化碳(CC14)的吸收性能最好,其饱和吸油率达到36.6g/g。     

三元共聚多孔丙烯酸酯类吸油树脂的合成及性能研究

以丙烯酸酯类为单体、苯乙烯为主要共聚功能单体,二乙烯基苯为交联剂,三氯甲烷为致孔剂,采用悬浮共聚工艺合成了一系列多孔的高吸油树脂。着重研究了树脂共聚单体组成、交联剂加量、引发剂用量以及分散剂加量等因素对吸油树脂吸油性能的影响。在最优化合成条件下制备的高吸油树脂具有较佳的吸油性能,对甲苯的吸附量可达32 g/g。     

微波辐射吸油性复合体的制备及性能研究

以甲基丙烯酸丁酯、丙烯酸β－羟乙酯、丙烯酸－２－乙基己酯为单体,ＢＰＯ为引发剂,二甲基丙烯酸二乙醇酯为交联剂,无纺布为基材,在微波辐射下分别合成甲基丙烯酸丁酯与丙烯酸β－羟乙酯的共聚复合吸油体及丙烯酸－２－乙基己酯与丙烯酸β－羟乙酯共聚复合吸油体。并考察了单体配比、引发剂用量、交联剂用量、微波辐射功率诸因素对高吸油性复合体的性能影响,从而制得了性能优异的吸油复合体。     

Studies on graft copolymerization of cyclohexyl methacrylate onto chloroprene rubber

Graft copolymerization of cyclohexyl methacrylate (CMA) onto chloroprene rubber (CR) was carried out in toluene using benzoyl peroxide as an initiator. The graft copolymer was isolated from the gross polymer by extracting it with a butanone solution. Infrared (IR) spectra of the graft copolymer showed the occurrence of grafting. Optimization of various parameters of the grafting, namely, time, temperature, and initiator concentrations, was performed. The mechanical adhesive properties of the graft copolymer, CR-g-CMA, were measured and compared with those of the graft copolymer of methyl methacrylate (MMA) onto CR, CR-g-MMA. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 64: 1733–1737, 1997     

Degree of conversion of a copolymer of an experimental monomer and methyl methacrylate for dental applications

The aim of this study was to determine the degree of double bond conversion of the copolymer of an experimental monomer and methyl methacrylate after photopolymerization. A mixture of an experimental monomer with four methacrylate groups and methyl methacrylate monomer (mass ratio 70 : 30) was polymerized by using various concentrations of light initiator system. The degree of conversion was determined with FTIR spectrometry. A photopolymerized 2,2‐bis[4‐(2‐hydroxy‐3‐methacryloxypropoxy)‐ phenyl]propane/triethylene glycol dimethacrylate (mass ratio 40 : 60) copolymer was used as a control material for degree of conversion. The maximum degree of conversion for the experimental monomer/methyl methacrylate copolymer was 62% and was obtained with 2 wt % initiator concentration. It was comparable to that of the control polymer (64%). The results of this study suggest that the experimental monomer/methyl methacrylate system can be polymerized by light initiator system. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 1908–1912, 2004     

苯乙烯/γ-甲基丙烯酰氧丙基三甲氧基硅烷乳液共聚动力学研究

以苯乙烯（St）、γ-甲基丙烯酰氧丙基三甲氧基硅烷（TMSPMA）为单体,十二烷基硫酸钠和辛基酚聚氧乙烯醚为复合乳化剂,通过乳液聚合法制备了St-TMSPMA共聚物。用傅里叶变换红外光谱仪对共聚物进行了表征,1090 cm-1处Si－O－Si键的吸收峰和1723 cm-1处羰基的伸缩振动吸收峰表明TMSPMA与St发生了共聚反应;并研究了反应温度、引发剂浓度、乳化剂浓度和TMSPMA浓度对乳液共聚反应速率的影响,结果表明,升高反应温度、增大引发剂或乳化剂浓度以及降低TMSPMA浓度都可以提高聚合反应速率。     

含氟丙烯酸酯四元共聚核壳乳液的合成与表征

采用半连续种子乳液聚合的方式,以十二烷基硫酸钠(SDS)和OP-10为复合乳化剂,甲基丙烯酸十二氟庚酯(Acty-flon-Go4)、甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)为原料制备了壳层含氟的核壳型丙烯酸酯共聚物乳液。研究了引发体系和聚合温度对聚合反应转化率的影响;通过透射电镜(TEM)、FTIR、示差扫描量热(DSC)对共聚物乳胶粒径、形态及结构进行了研究。     

苯乙烯-甲基丙烯酸甲酯悬浮聚合工艺优化

采用悬浮聚合法合成了苯乙烯(ST)-甲基丙烯酸甲酯(MMA)共聚物珠粒.研究了引发剂用量、搅拌速度、反应温度、分散剂用量、水与单体体积比对苯乙烯-甲基丙烯酸甲酯悬浮聚合的影响.结果表明,在ST用量为2.0mL、MMA用量为7.5 mL、水与单体体积比为6:1、1 mol·L-1 MgCl2溶液用量为2.5 mL、1 m...     

Graft copolymerization of vinyl monomers on cellulosic materials

Graft copolymers of acrylonitrile, ethyl acrylate, methyl acrylate, ethyl methacrylate and methyl methacrylate and of acrylonitrile/ethyl methacrylate and acrylonitrile/methyl methacrylate monomer mixtures on carboxymethylcellulose (degree of substitution 0.4–0.5) were prepared by use of ceric ion initiator in aqueous medium. The extent of graft polymer formation was measured in terms of graft level, molecular weight of grafted polymer chains and frequency of grafting as function of ceric ion concentration. It was found that at comparable reaction conditions, the molecular weight and frequency of grafting were not of the same order of magnitude. For the monomer mixtures, the copolymer compositions obtained from the total nitrogen content of the acrylonitrile/alkyl methacrylate copolymer samples showed that a relativity low amount of the acrylonitrile monomeric units were incorporated into the graft copolymer even at high acrylonitrile content of the feed.     

Preparation and characterisation of styrene—methyl methacrylate and styrene–methacrylic acid copolymer latices

Series of styrene-methyl methacrylate and styrene-methacrylic acid copolymer latices have been prepared by emulsion polymerisation using polyoxyethylene nonyl phenyl ether as emulsifier and potassium persulphate as initiator. the effects of surfactant concentration and monomer composition on the ultimate particle size and conversion were investigated. The ultimate particle diameters decreased with increasing surfactant concentration, while the conversions were found to be almost independent of surfactant concentration. The ultimate particle diameters were notably decreased by increasing the content of methacrylic acid. Trace carboxyl groups were detected both in polystyrene latex and styrene-methyl methacrylate copolymer latices. The number of sulphate groups on the polystyrene latex surface was about five times that of carboxyl groups.     

四官能度过氧化物JWEB50引发的PS-b-PMMA合成与表征

引言嵌段共聚物是具有两种或两种以上不同链段的聚合物,不同链段间存在的化学键限制了聚合物的相分离程度,易形成微相分离结构[1],而嵌段共聚物能作为聚合物共混体系的相容剂,只需加入少量     

Ce(IV)-ion-initiated grafting of methyl methacrylate onto gelatin

Grafting of methyl methacrylate onto gelatin in the presence of Ce(IV) ions as graft initiators has been studied. By statistical planning of experiments regression equations were obtained which described the effect of gelatin, methyl methacrylate, and initiator concentrations on the grafting efficiency, gelatin, and methyl methacrylate conversion and on the copolymer composition.