共查询到19条相似文献,搜索用时 201 毫秒
1.
聚丙烯酰胺疏水缔合衍生物研究进展 总被引:5,自引:0,他引:5
聚丙烯酰胺疏水缔合衍生物是一类重要的水溶性聚合物 ,由于疏水缔合水溶性聚合物的耐温耐盐抗剪切性能和贮存稳定性 ,使其在工业生产中得到日益广泛的应用。综述了疏水缔合衍生物的特殊性能、合成方法及工业应用 相似文献
2.
疏水缔合水溶性聚合物指在常规水溶性聚合物主链上引入极少量疏水基团所形成的一类新型聚合物。与部分水解聚丙烯酰胺(HPAM)相比,这类聚合物的分子量不高,但具有独特的溶液性能。本文综述了疏水缔合聚合物的增黏、耐温、抗盐、抗剪切的溶液性能。 相似文献
3.
4.
5.
疏水性聚丙烯酰胺是一种重要的疏水缔合水溶性聚合物,它可以通过多种方法合成。本文结合均相共聚法和表面活性大单体法2种方法,以丙烯酸和Span80为原料首先合成了一种具有表面活性的疏水缔合型单体Span80-AA,然后将Span80一AA与丙烯酰胺聚合反应合成疏水性聚丙烯酰胺,并研究了时间、引发剂浓度、溶剂配比、大单体含量和温度对疏水聚合物粘度和分子量的影响,从而得到比较合适的实验条件。 相似文献
6.
7.
以苯甲酰氯、丙烯酸、N,N-二甲基-1,3-丙二胺和氯乙酸为主要原料,合成了一种甜菜碱型功能单体丙烯酰胺丙基甜菜碱。丙烯酰胺丙基甜菜碱单体、丙烯酰胺、疏水单体进行三元共聚,得到聚甜菜碱型疏水聚合物,对聚合物溶液的抗盐性能进行了评价。结果表明,新型聚甜菜碱型疏水聚合物溶液具有优良的盐增稠性能。 相似文献
8.
采用2-丙烯酰胺基-2-甲基丙磺酸(AMPS)与丙烯酸十八酯(SA)、丙烯酰胺(AM)通过自由基胶束共聚法合成疏水缔合聚合物P(AM-AMPS-SA)。经红外和核磁共振表征聚合物结构,并测定在不同剪切速率、NaCl、CaCl2浓度及温度条件下的聚合物溶液表观黏度的变化以及聚合物溶液的临界缔合浓度。结果表明,所制备的疏水缔合聚合物P(AM-AMPS-SA),它的临界缔合浓度在0.25~0.3g/dL,具有一定的抗温、抗盐性以及抗剪切性,且对二价盐的抗盐性比一价盐要好。 相似文献
9.
《现代化工》2016,(4)
为解决油田用丙烯酰胺类聚合物抗温、抗盐性能差的问题,以丙烯酰胺、丙烯酸及双尾型疏水单体N-苯乙基-N十二烷基甲基丙烯酰胺(PEDMAM)为主要原料,合成了一种新型疏水缔合聚合物(DTHAP-12)。采用KYPAM作为对比,研究了DTHAP-12的增黏性能、抗温抗盐能力和驱油性能,结果表明,聚合物的临界缔合质量浓度在2 400 mg/L左右,95℃聚合物的黏度保留率达72.39%,同时在一定的矿化度范围内表现出明显的盐增稠效应。岩心驱替实验表明,水驱至含水率为98%后,0.3 PV DTHAP-12驱及后续水驱的采收率提高了15.14%;聚合物驱第2段塞DTHAP-12采收率提高了10.53%,远远高于第2段塞KYPAM的3.28%。 相似文献
10.
11.
12.
The hydrophobically associating cationic fluorinated polyacrylamide (CFPAM), modified with fluorinated acrylate, 2-(perfluorooctyl)ethyl
acrylate (FEA), has been newly synthesized, by free radical micellar copolymerization in aqueous solution. The solution properties
of these polymers were investigated in details in this study. In addition, the flocculation of CFPAM was also evaluated. The
results showed that there were strong hydrophobic associations in the CFPAM aqueous solution. The addition of NaCl resulted
in an increase of solution viscosity, which indicated the good salt-resistant performance of CFPAM. The polymers also exhibited
excellent property of temperature and shearing tolerance. Furthermore, the polymer showed high surface activity. At the same
time, its flocculation properties were evaluated with kaolin suspensions using a standard jar test. All the results demonstrated
the superiority of the cationic fluorinated polyacrylamide as a flocculant. 相似文献
13.
阳离子聚丙烯酰胺作为一种高分子物质,具有高效、环保和价廉等很多的优势,但不同的制备方法对水乳液絮凝剂的性能具有不同的影响。对此,以丙烯酰胺(AM)、甲基丙烯酰氧乙基三甲基氯化铵(DMC)为单体,以分散聚合技术作为主要合成方法,以硫酸铵作为反应介质,合成一种CPAM絮凝剂,并充分讨论了不同单体总量与配比、反应温度、反应时间、硫酸铵浓度、引发剂种类等多种因素对阳离子聚丙烯酰胺的影响。最后通过红外光谱等的分析,验证了合成的阳离子聚丙烯酰胺具有较好的稳定性、流动性等特点。 相似文献
14.
两性疏水缔合聚丙烯酰胺的合成及性能 总被引:1,自引:0,他引:1
以丙烯酸(AA)、丙烯酰胺(AM)、2-丙烯酰胺基八烷基磺酸(HAMC8S)和二甲基二烯丙基氯化铵(DMDAAC)为单体,合成了含有疏水碳链、磺酸基以及季铵盐等活性基团的两性疏水缔合聚丙烯酰胺(HAPAM)AA/AM/HAMC8S/DMDAAC,相对分子质量(简称分子量,下同)为5.5×106,并通过红外光谱和1HNMR对其结构进行了表征。最佳反应条件为:w(总单体)=30%,w(引发剂)=0.10%(以单体总质量计),反应温度为55℃,反应时间为5 h,产率为84%。同时研究表明,温度为80℃时,黏度保留率达66%以上;盐度为8%时,黏度保留率达75%以上;剪切作用时间为240 min时,黏度有所增加,这些性能都远高于相同条件下均聚聚丙烯酰胺(HPAM)黏度保留值。 相似文献
15.
以对正丁基苯乙烯(nBS)、对乙烯基苯磺酸钠(SSS)和丙烯酰胺(AM)为原料,采用自由基胶束聚合法合成了阴离子型三元疏水缔合聚合物PAnBS,用红外光谱法、紫外光谱法以及核磁共振氢谱法对共聚物的结构进行了表征;考察了不同反应条件对共聚物溶液表观黏度的影响,得到了具有较强增黏能力的聚合物合成工艺条件:nBS、SSS和引发剂用量分别为总单体摩尔分数的1.5%、9%和0.1%,总单体和表面活性剂十二烷基硫酸钠(SDS)在溶液中的质量分数分别为25%和6%,反应温度50℃,反应时间10 h。与相对分子质量(简称分子量,下同)1 970万、水解度19.43%的超高分子量部分水解聚丙烯酰胺(HPAM)相比,所得PAnBS在NaCl或CaCl2水溶液中具有更强的增黏能力;PAnBS在淡水或盐水溶液中于80℃下的耐老化性能优于超高分子量HPAM,表现出优良的耐温抗盐性能。 相似文献
16.
采用自由基胶束聚合法合成了丙烯酰胺(AM)/丁基苯乙烯(BS)/2-甲基-2-丙烯酰胺基丙磺酸钠(NaAMPS)疏水缔合水溶性共聚物PASA,PASA避免了目前疏水缔合聚合物溶液热稳定性差的问题.研究得到了适宜的反应条件,包括NaAMPS、BS和引发剂加量相对于单体总量的摩尔分数分别为10%、2.5%和0.07%,总单体在水里的质量分数为10%,SDS在水里的质量分数为6.0%,反应温度50℃,pH=6~7,反应时间12 h.采用以上反应条件得到PASA的临界缔合质量浓度为0.05 g·dL-1,对应的水溶液表观黏度为283 mPa·s,质量浓度为0.1 g·dL-1的水溶液表观黏度为1020 mPa·s.采用元素分析、UV、FT-IR和1HNMR证实了共聚物的分子结构;DSC分析表明了共聚物分子链中存在疏水嵌段. 相似文献
17.
Sohel Shaikh Sk. Asrof Ali Esam Z. Hamad Basel F. Abu-Sharkh 《Polymer Engineering and Science》1999,39(10):1962-1968
Hydrophobically associating block copolymers of polyacrylamide/styrene with a high hydrophobe content were synthesized using micellar copolymerization under various conditions of surfactant and initiator concentrations with the objective of determining the conditions that produce optimum solution properties for enhanced oil recovery. Solubilities, aqueous solution viscosities and interfacial properties with air and oil of the copolymers were investigated. The influence of salt on the solution properties was also studied. Nature of hydrophobic sites and onset of hydrophobic association were studied by measuring the fluorescence of pyrene in polymer solutions. Optimum solution properties were obtained for copolymers synthesized under conditions of high surfactant and initiator concentrations. The copolymers displayed substantial thickening properties at low concentrations with enhanced thickening in the presence of salt. The interfacial tensions of the aqueous solutions with n-decane and air were also reduced. Interfacial properties were slightly sensitive to salt concentration. The copolymer solutions showed shear and temperature thinning behaviors typical of polymer solutions. 相似文献
18.
19.
Roger M. Juárez Data Facundo Mattea Miriam C. Strumia Juan M. Milanesio 《应用聚合物科学杂志》2020,137(47):49532
Synthesis and design of polymer systems based on acrylamide for enhanced oil recovery (EOR) is essential for reservoirs with high salinity and high temperature conditions. The use of associative monomers or the modification of the polymers with hydrophobic functional groups represents a promising alternative that extends the use of chemical EOR. In this study, terpolymers based on acrylamide, acrylic acid and butyl methacrylate were synthesized and the rheological properties of aqueous solutions of the obtained polymers at different pH values, and salt concentrations were evaluated. The results show that at alkaline conditions the viscosity of aqueous solutions of a polymer synthesized with 68.6 wt% of acrylamide, 22.9 wt% of acrylic acid and 8.6 wt% of butyl methacrylate increases by a factor of more than 1,000 at a 3 wt% concentration. Also, all polymers with the hydrophobic modification showed higher viscosity in saline solutions compared to their acrylamide-acrylic acid analogue. 相似文献