反气相色谱法测定苯-丙-硅共聚物的溶解性能

本文应用反气相色谱法测定了苯乙烯-丙烯酸丁酯-乙烯基三乙氧基硅氧烷共聚物与探针分子的表观热力学相互作用参数X12,并以此研究了聚合物与小分子有机化合物的溶解性能。实验中测定了探针分子在聚合物固定相中的保留时间,计算出比保留体积Vg°及X12。根据聚合物与探针分子相溶性判定原则:当X12(0.5时,该探针分子为聚合物的良溶剂,X12越小,溶剂的溶解能力越强;当X12(0.5时,该探针分子则为聚合物的不良溶剂;当X12=0.5时,则该探针分子为聚合物的理想溶剂。预估了聚合物与小分子有机化合探针分子的溶解性能,为该聚合物作为固相微萃取吸附剂的应用性能研究提供了重要的依据。     

纤维素醚接枝聚乙烯吡咯烷酮-醋酸乙烯-甲基丙烯酸甘油酯杂化聚合物

正本申请公开了一种杂化聚合物,包括纤维素醚部分和一个或多个聚合物部分,包括(a)甲基丙烯酸缩水甘油酯部分,(b)N-乙烯基-2-吡咯烷酮部分,以及可选地(c)乙酸乙烯酯部分,其中聚合物部分通过甲基丙烯酸缩水甘油酯部分接枝到纤维素醚部分。此外,本申请公开了制备杂化聚合物的方法及其     

萨北开发区北Ⅲ-5-3注入站聚合物溶液粘度的影响因素研究

研究聚合物溶液粘度的影响因素及损失规律,有利于采取有效措施降低其粘度损失,确保溶液配注质量,提高聚合物驱油效果。通过对大庆油田采油三厂北部过渡带聚合物溶液粘损调查,从剪切、水质两方面,对聚合物溶液粘度的主要影响因素进行分析,总结出注入聚合物溶液的粘度影响因素。为进一步提高注入聚合物溶液粘度,保证聚合物驱油效果提供了理论依据。     

树枝状大分子改性聚乙二醇-7-乙基-10-羟基喜树碱聚合物的制备

目的制备树枝状大分子改性聚乙二醇(PEG)-7-乙基-10-羟基喜树碱(SN-38)聚合物,并对聚合物的制备条件、包封率、载药量、粒径表征进行了考察。方法采用新的"酸酐法"合成了树枝状改性大分子PEG,以树枝状改性大分子PEG为载体材料,SN-38为药物,结果采用超声波作用时间在4 h,载体与SN-38质量比为1∶4时,所制备的树枝状大分子改性聚乙二醇-SN-38聚合物有较高包封率、载药量。从粒径分布图可知,聚合物颗粒分布在30 nm和150 nm左右相对集中。结论优选的处方工艺稳定可靠,具有很大的应用前景。     

树枝状-星型聚合物的合成研究进展

介绍了树枝状-星型聚合物的合成方法,重点综述了以树枝状大分子引发剂合成树枝状-星型聚合物的研究进展,对树枝状-星型聚合物的性质和应用等进行了讨论.     

2-乙基-2- 唑啉的阳离子开环聚合及聚合物的表征

以对甲苯磺酸甲酯为引发剂进行２乙基２唑啉阳离子开环聚合研究，主要考察了不同的单体／引发剂配比、聚合温度和聚合时间对聚合转化率和聚合物分子量的影响。聚合物通过ＩＲ、１Ｈ核磁共振、ＤＳＣ进行表征，并考察了聚（２乙基２唑啉）与部分聚合物和共聚物的共混性能。     

聚合物-金属组合成型及其关键技术

介绍了应用比较广泛的四种聚合物-金属组合成型技术的成型机制:多组分注塑成型技术、多组分金属成型技术、黏结剂粘结的聚合物-金属组合成型技术、聚合物-金属直接组合成型技术。分析了聚合物-金属直接组合成型的关键技术,从残余应力的分析,提出了相应的研究方法,并展望了该技术的研究趋势。     

聚氯化-2-羟丙基-1,1-N-二甲胺的合成及杀菌效果

报道了聚氯化-2-羟丙基-1，1-N-二甲胺的合成方法及性质。讨论了实验条件对反应的影响，并用该聚合物进行了杀菌试验，实验证明该聚合物是一种高效的、持续时间长的杀菌剂。     

聚合物-膨润土复合材料制备及应用研究进展

综述了工业生产中常用的聚合物-Bt复合材料的制备方法,重点对聚合单体插层原位聚合法、聚合物溶液插层法和聚合物熔融插层法的合成原理和基本性能进行了分析。同时评述了在建筑、污水处理、石油工程等领域中聚合物-Bt复合材料的工业应用及发展,并对今后聚合物-Bt复合材料的研究方向提出建议,以便为相关研究提供参考。     

阻燃-光稳定复合材料的研究进展

对于向聚合物中同时添加光稳定组份、阻燃组份和单独向聚合物中添加阻燃-光稳定多功能型添加剂,制造阻燃-光稳定聚合物复合材料的方法的研究进展进行了综述。     

一种新型驱油剂AM-VP-AMPS共聚物的研究

以丙烯酰胺 (AM)、N 乙烯基 2 吡咯烷酮 (VP)和 2 丙烯酰胺基 2 甲基丙磺酸 (AMPS)为单体 ,以水作为溶剂 ,在反应温度 6 0～ 6 5℃ ,pH值为 8左右 ,反应时间为 8h的条件下合成了AM-VP -AMPS共聚物。用IR、13 CNMR对共聚物结构进行了表征 ,研究了共聚物溶液的耐温抗盐性能。结果表明 :少量的阳离子会导致共聚物的水溶液黏度急剧下降 ,当阳离子量达到一定值后 ,继续增加阳离子量对共聚物的水溶液黏度影响不大 ,共聚物的标准盐溶液在温度 (90± 1 )℃无氧的条件下老化 1 30天 ,其溶液黏度的绝对值仍然在 6 0mPa·s以上。     

甲基丙烯酸甲酯—丙烯酸丁酯—丙烯酸三元溶液聚合研究Ⅱ.聚合物溶液性能影响因素研究

通过溶液聚合的方法合成了 Poly(MMA-BA-AA)三元共聚物溶液 ,研究了聚合体系中溶剂的种类及用量、单体组成、交联剂用量、引发剂用量、聚合温度对聚合物溶液性能的影响。实验结果表明 ,在良溶剂体系中 ,聚合物溶液的稳定性好、粘度小 ;随着 MMA、AA用量的减少 ,溶液的稳定性增大、粘度减小 ;引发剂用量增大 ,聚合温度升高 ,溶液的稳定性增大、粘度增大。     

AM/AN/ANPE共聚物溶液性质研究

采用自由基胶束聚合法合成了丙烯酰胺(AM)/丙烯腈(AN)/烯丙基(对-壬基)苯基醚(ANPE)疏水缔合型水溶性共聚物,考察了温度、盐度和剪切时间对聚合物溶液表观粘度的影响。结果表明,所合成的AM/AN/ANPE三元共聚物的临界缔合质量浓度为4.39g/L,具有较好的抗盐、抗温及抗剪切性。     

Electrochemical synthesis and characterization of poly (o-amino benzyl alcohol) and poly (o-amino benzyl alcohol-co-o-anisidine)

In this study; poly (o-amino benzyl alcohol) and poly (o-amino benzyl alcohol-co-o-anisidine) copolymer films were electrochemically synthesized by cyclic voltammetry technique on the platinum electrode. The synthesis of copolymer films was achieved in various monomers feed ratio (o-amino benzyl alcohol: o-anisidine; 8:2, 1:1, 2:8) of o-amino benzyl alcohol and o-anisidine. Different solution types were tested in aqueous and non-aqueous media, especially during the synthesis process, as the electrolyte medium. As a result of the experiments, it was determined that sulfuric acid solution was the most suitable solution for both homopolymer and copolymer film growth. Homopolymer and copolymer samples were characterized by FT-IR, cyclic voltammetry (CV), SEM, digital images and TGA/DTA techniques. The CV, SEM and digital images results indicated that the solution which has high ratio of monomer is more effective in copolymer film synthesis mechanism. TGA results showed that the 1:1 copolymer film had higher thermal stability than the films at other monomer ratios. Also, electrochemical studies exhibited that the copolymer film in 1:1 ratio is partially more electrochemically stable than other copolymer films.     

Electrospun polyvinyl chloride/poly (butyl methacrylate-<Emphasis Type="Italic">co</Emphasis>-butyl acrylate) fibrous mat for absorption of organic matters

Polyvinyl chloride (PVC) is a hydrophobic and lipophilic polymer, and its electrospun mat has plenty of micro- and nanopores. However, the PVC electrospun mat cannot absorb organic substances due to its weak fiber-web structure. The copolymer of butyl methacrylate (BMA) and butyl acrylate (BA) has very good electrospinnability, and its electrospun fibers can construct a firm fiber-web structure through many bonded nodes. However, there are few micro- and nanopores in the fiber-web of the copolymer of BMA and BA since the electrospun fibers of the copolymer of BMA and BA can cohere with each other. Therefore, the copolymer of BMA and BA was blended with PVC in N,N-dimethylformamide to provide their electrospun fibrous mat with good fiber-web structure and many micro- and nanopores, and their electrospun fibrous mat was then used as an absorbent of organic substances in this work. We first discovered the electrospinnable concentrations for PVC solution, the solution of the copolymer of BMA and BA, and the blend solution of PVC and the copolymer of BMA and BA by researching the characteristics of these solutions, and we analyzed the effect of the electrospinnability of PVC in the blend solution on the formation of fiber-web structure. Then, the blend solution with an electrospinnable concentration was electrospun into fibrous mat, and its surface characteristics and absorption capability to organic matters were subsequently investigated. The correlation between absorption capability and fiber-web structure was analyzed through field emission scanning electron microscope. The result showed that the blend solution of PVC and the copolymer of BMA and BA had better electrospinnability in comparison with PVC solution, and the corresponding fibrous mat had a great potential application in removing organic matters since it owned better hydrophobic and lipophilic properties than the fibrous mat electrospun from PVC solution or the solution of the copolymer of BMA and BA.     

Rheological behavior of N,N‐dimethyl acrylamide–acrylamido methylpropane sulphonate copolymer

Copolymer of N,N‐dimethylacrylamide (NNDAM) and sodium 2‐acrylamido‐2‐methylpropanesulfonate (NaAMPS) have been prepared by free‐radical copolymerization and characterized with the help of molecular weight, molecular weight distribution, intrinsic viscosity, and monomer ratio in the copolymer. The solution behavior of a copolymer containing 26.62 wt % NaAMPS is studied in different solvents, namely, water (W), dimethyl sulfoxide (DMSO), ethylene glycol (EG), and ethanol (EtOH). The reduced viscosity of the copolymer is highly dependent on the ionic strength of the copolymer solution. The reduced viscosity decreases as a function of solvent selection in the order W > DMSO > EtOH > EG. The shapes of the η_sp / C vs. C plots indicate the polyelectrolyte behavior of the copolymer, except for the case of EG solutions, where nonpolyelectrolyte behavior is observed. However, at a certain degree of ionization attained by adding W as cosolvent, the copolymer begins to demonstrate polyelectrolyte behavior. For this copolymer, there exists a minimum concentration of brine (NaCl, CaCl₂, etc.) above which solution viscosity is not further reduced. The copolymer solution behaves as a power law fluid, and exhibits time‐dependent thixotropic behavior. The copolymer cannot regain its solution viscosity when allowed to shear at a constant rate for long period of time. The reduced viscosities of copolymer solutions increase with increasing temperature in W and DMSO, yet decreases with increasing temperature in EG. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 1521–1529, 2002     

High strength and high toughness aromatic polyamide fiber. I. Preparation and properties of block poly(p-phenylene and 4,4′-diphenyl ether terephthalamide) fiber

High strength and high toughness organic fibers can be prepared by molecular design of a suitable block copolymer with mixed segment of rigid and flexible molecular chains. In this paper, the synthesis of fiber forming high molecular weight block copolymer of poly(p-phenylene terephtalamide) (PPTA) and poly(4,4′-diphenyl ether terephthalamide) (DPETA) was studied by the low temperature solution polycondensation method. The high molecular weight block copolymer could be obtained in the mixed solution of 1,3-dimethyl1-2-imidazolidone (DMI) and N,N′-dimethyl acetamide (DMAc) in the presence of triethylamine. The copolymer structures were characterized by elemental analysis and IR spectra. The thermal stability of the block copolymer was better than that of PPTA homopolymer and the ordered copolymer. The wet spinning of the block copolymer was performed using the reaction solution as the spinning dope. The maximum tensile strength and elongation were observed for the filament containing 50% PPTA. The block copolymer had high strength and high Yound's modulus but had a low elongation compared with the ordered copolymer.     

AM／AMPS／AMC12S共聚物的合成与性能

采用氧化－还原引发体系合成了丙烯酰胺（ＡＭ）／２－甲基丙磺酸（ＡＭＰＳ）／２－丙烯酰胺基十二烷磺酸三元共聚物。借助红外光谱和热分析研究聚合物的结构和热稳定性,初步评价了共聚物的溶液性能。结果表明,ＡＭ／ＡＭＰＳ／ＡＭ１２Ｓ共聚物热稳定性好,耐温抗盐能力强。     

N,N-二乙基丙烯酰胺及其共聚物的合成

首先合成了Ｎ,Ｎ－二乙基丙烯酰胺,并采用氧化－还原引发体系,合成了丙烯酰胺（ＡＭ）／２－丙烯酰胺基－２－甲基丙磺酸（ＡＭＰＳ）／Ｎ,Ｎ－二乙基丙烯酰胺（ＤＥＡＭ）三元共聚物。通过元素分析和红外光谱分析了ＤＥＡＭ的结构,用红外光谱和热分析研究了聚合物的结构与热稳定性,初步评价了共聚物的溶液性能。结果表明,ＡＭ／ＡＭＰＳ／ＤＥＡＭ共聚物具有较好的热稳定性和耐温抗盐能力。     

绝热反应合成AM/AMPS共聚物及其性能

选用过硫酸铵〔(NH4)2S2O8〕和亚硫酸氢钠(NaHSO3)为氧化-还原引发体系,以N,N,N',N'-四甲基乙二胺(TMEDA)、乙二胺四乙酸二钠(EDTA-2Na)和尿素为助剂,采用水溶液绝热反应合成丙烯酰胺(AM)/2-丙烯酰胺基-2-甲基丙磺酸(AMPS)共聚物,考察了AM与AMPS绝热共聚合的放热过程,并对共聚物的结构和主要性能进行了考察。结果表明,降低引发温度和减小引发剂用量,有利于聚合物分子链的增长,合成的共聚物溶解性好,相对分子质量达2 500万;在95℃、采用新鲜污水配制共聚物溶液,60 d的黏度保留率达84.2%,模拟油藏条件进行驱油效果评价,可提高原油采收率达17.38%。