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以自制的中间体N,N-二(2-羟乙基)-2-氨基丙烯为原料,对其进行磺化反应,控制温度、时间和摩尔比反应合成磺酸型水性聚氨酯扩链剂N,N-二(2-羟乙基)-2-氨基丙磺酸钠,借助核磁氢谱(1H NMR)、红外光谱(FTIR)、元素分析、X射线衍射(XRD)等手段对合成产物进行了组成、结构和结晶性表征,用热重分析仪表征了产物的热稳定性。根据产物的磺化度确定最佳的合成工艺:反应温度为90℃,反应时间为8 h,N,N-二(2-羟乙基)-2-氨基丙烯和亚硫酸氢钠(NaHSO3)的物料比为1:2.5,磺化率可达到94%以上。分别以二羟甲基丙酸(DMPA)和自制磺酸型单体作为亲水扩链剂制备羧酸型水性聚氨酯(CWPU)和磺酸型水性聚氨酯(SWPU),其性能对比结果表明:SWPU相比于CWPU具有较好的亲水性和耐热性能;固含量及稳定性方面,SWPU也是优于CWPU的。 相似文献
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以乙二胺和1,4-丁烷磺内酯为原料,合成了水性聚氨酯亲水扩链剂N-(2-氨基乙基)-氨基丁烷磺酸钠,采用红外光谱、核磁共振碳谱和元素分析对其结构进行了表征,讨论了不同原料摩尔比对产物含量的影响。结果表明,提高乙二胺与1,4-丁烷磺内酯的摩尔比可以明显提高目标产物的含量;当乙二胺与1,4-丁烷磺内酯的摩尔比为6.0时,合成产物中目标产物的含量更加接近理论值。 相似文献
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以2-羟乙基氨基甲酸-2-羟丙酯或1,4-丁二醇作为扩链剂,采用二苯基甲烷二异氰酸酯、聚ε己内酯二醇或聚己二酸乙二丙二酯二醇合成了聚氨酯弹性体。采用差示扫描量热仪、动态热机械分析仪、电子万能试验机、橡胶回弹性试验机等仪器对产物进行了表征。结果表明,与1,4-丁二醇相比,HPHEC作为扩链剂时,其凝胶时间约是1,4-丁二醇的3倍,制得的聚氨酯弹性体撕裂强度提高10%~25%,同时发现其玻璃化转变温度(Tg)和力学损耗角正切(tanδ)升高。 相似文献
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以2-乙基 -2-羟甲基氧杂环丁烷与二甲胺为原料,合成了一种亲水离子位于聚氨酯结构的侧链、且结构中不含有 β氢的阳离子亲水扩链剂 ——N,N-二甲基 -2-(二羟甲基)丁胺(DMDMOBA),将其作为扩链剂合成了阳离子水性聚氨酯。采用 1H NMR和液质联用对 N,N-二甲基 -2-(二羟甲基)丁胺进行结构表征,采用马尔文激光粒度仪对阳离子水性聚氨酯乳液的粒径进行测试,采用拉伸试验机对聚氨酯胶膜拉伸强度进行测试。结果表明:与常用阳离子亲水扩链剂 N-甲基二乙醇胺(MDEA)比较,新型扩链剂合成的阳离子水性聚氨酯的亲水离子位于聚氨酯侧链,其自乳化能力好于主链型阳离子水性聚氨酯,且具有更好的抗黄变性能,合成的水性聚氨酯胶膜力学性能也优于主链型阳离子水性聚氨酯。 相似文献
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《聚氨酯工业》2017,(1)
用三羟甲基丙烷单烯丙基醚(TMPME)和亚硫酸氢钠进行烯烃自由基加成反应生成三羟甲基丙烷单亚丙基磺酸钠醚(TMPMS),经盐酸酸化,成功合成了一种新型的液态磺酸型扩链剂三羟甲基丙烷单亚丙基磺酸醚(TMPMH),并以此作为扩链剂制备出高固含量的水性聚氨酯乳液。通过质谱(MS)、红外光谱(FT-IR)、热失重分析(TGA)等手段对磺酸型扩链剂的化学结构、产物热稳定性进行了初步表征;通过透射电镜(TEM)、粒径分析等手段对乳液相关性质进行了初步表征。结果表明,合成的液态磺酸型扩链剂纯度高,热稳定性好,起始分解温度达110.8℃;以此作为水性扩链剂制备出磺酸型水性聚氨酯乳液,乳液粒径在100 nm左右,且呈单一分布,乳液的临界固含量(S_η)高达56.9%,远高于羧酸型水性聚氨酯乳液(S_η=39.8%)。 相似文献
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Mu‐Ya Hung Shih‐Hsiung Chen Rey‐May Liou Chin‐Shan Hsu Juin‐Yih Lai 《应用聚合物科学杂志》2003,90(12):3374-3383
A sodium sulfonate polysulfone membrane was prepared for the dehydration of a water/ethanol mixture by pervaporation. The separation performances of water and ethanol were examined by the testing of the ethanol/water mixture under operating conditions. The permselectivity of the sodium sulfonate polysulfone membrane was found to strongly depend on the sodium content in the membrane. The sodium sulfonate ratio showed a significant influence on the hydrophilicity and diffusion behavior of the polysulfone membrane. Moreover, the difference in the diffusion of the permeates played an important role in the sulfonate polysulfone membrane. It was found that a high‐performance pervaporation membrane could be achieved with a sodium sulfonate polysulfone membrane. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3374–3383, 2003 相似文献
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A comparison of the levels of unsaturation in α-olefin sulfonates (AOS) and related derivatives determined by iodination,
bromination and hydrogenation techniques showed that quantitative hydrogenation is the only method having wide applicatbility.
Although halogenation methods frequently give results in agreement with hydrogenation data, they can show variations with
reaction time and composition of the sample. Unsaturation in sulfonate methyl esters could not be determined by halogenation.
The amount of †1-isomer in alkene sulfonate sodium salts determined by oxidative cleavage with periodate-permanganate was always low compared
to that determined by NMR. Oxidative cleavage of the sulfonate methyl esters gave †1-isomer levels in agreement with NMR results. 相似文献
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Ming Zhou Liangliang Xia Yinglan He Ling Zhang Xin Qiao Xiang Zhong 《Journal of surfactants and detergents》2015,18(2):303-308
Though the gemini surfactants have unique properties, their high cost limits their scope of application. The new salt‐resistant sulfonate gemini surfactants disodium 5,12‐bis(alkyloxymethyl)‐4,7,10,13‐tetraoxa‐2,15‐dihydroxyhexadecane 1,16‐disulfonates bearing two alkyl chains, two hydroxyl and two sulfonate groups were prepared from fatty alcohol, epichlorohydrin, glycol, sodium hydroxide, sodium bisulfite and sodium sulfite. Their synthesis exhibited the advantages of low raw material cost, mild reaction conditions and easy operation. The structures of prepared compounds were confirmed by FTIR and 1H NMR. These gemini surfactants show excellent surface‐active properties, good salt resistance and excellent foaming ability. 相似文献
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以乙二胺,顺丁烯二酸酐、亚硫酸氢钠和十二醇为原料,通过三步法合成阴离子磺酸盐双子表面活性剂。通过正交实验考察了反应物投料比、反应温度和反应时间对目标产物收率的影响。研究表明合成目标产物的最优工艺条件为:中间体二乙胺双-(酰基丙酸-α-磺酸钠)b:十二醇摩尔比为1∶2.2,反应温度为145℃,反应时间为6h。产物结构经IR、1 H NMR表征为目标产物。 相似文献
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以α-溴代十四酸乙酯和4-癸基苯酚为原料,经Williamson醚化、磺化及皂化反应制备了一种不对称阴离子Gemini表面活性剂α-(4-癸基-2-磺基)-苯氧基十四酸钠,简写为C12CO2Na-p-C10SO3Na,考察了醚化反应条件,并用FTIR和1HNMR表征了中间体及目标产物结构。结果表明,醚化反应的最佳条件为:以N,N-二甲基甲酰胺(DMF)和甲苯作溶剂,无水K2CO3作缚酸剂,物料比n(α-溴代十四酸乙酯)∶n(4-癸基苯酚)=1.05∶1,回流反应3 h,醚化产物收率为77.2%(以4-癸基苯酚计)。采用吊片法测定了目标产物的表面活性,其表面张力最低可降至26 mN/m左右,临界胶束浓度(CMC)为3.28×10-6mol/L,比相应常规单链表面活性剂十四烷酸钠和间癸基苯磺酸钠的CMC低3个数量级,体现出Gemini表面活性剂优异的表面活性。 相似文献
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以十二烷基异硫氰酸酯和对肼基苯磺酸钠为原料,合成了一种新的化合物N-十二烷基-N'-(对氨基苯磺酸钠)硫脲(DOPT),经元素分析、红外、紫外和核磁共振等测试,确定了其结构。 相似文献
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A series of sodium poly(styrene sulfonate)-block-poly(4-tert-butylstyrene) (NaPSS-b-PtBS) copolymers and related homopolymers were characterized by Fourier transform infrared (FT-IR) and nuclear magnetic resonance (NMR) spectroscopy. The homopolymers included polystyrene (PS), poly(4-tert-butylstyrene) (PtBS), sodium poly(4-styrene sulfonate) (NaP4SS), sodium poly(styrene sulfonate) (NaPSS) with various sulfonation levels, and partially sulfonated PtBS (PtBSS). The structures of NaPSS and PtBSS were elucidated, and the effect of sulfonation level on the NaPSS FT-IR spectrum was studied. The characteristic peaks for NaPSS and PtBSS in FT-IR and NMR spectra were identified. 相似文献
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运用常规两步法和微波法制备了离子液体1-丁基-3-甲基咪唑四氟硼酸盐([bmim]BF4)以及1-羟乙基-3-甲基咪唑四氟硼酸盐([C2OHmim]BF4),并通过红外光谱表征以及密度和溶解度等物理性质的检测,对两种制备方法进行了比较。实验结果表明,不需使用任何溶剂,选择N-甲基咪唑和溴代正丁烷(2-氯乙醇)的配比为1∶1.1,[bmim]Br([C2OHmim]Cl)和NaBF4的配比为1∶1,在微波炉功率为350 W的条件下反应,[bmim]BF4和[C2OHmim]BF4的产率分别达70.0%和76.9%。反应采取微波间歇加热的方式,方法简单高效、无溶剂污染,但产率偏低,其制备条件还需进一步研究与完善。 相似文献