新型双组分室温自交联共聚物乳液体系的研究

用马来酸酐和乙二胺合成了含有双键的伯胺化合物(UPA),并用其与丙烯酸系单体进行乳液共聚合制各了双组分室温固化涂料的第一组分。研究了乳化剂种类和UPA用量对聚合稳定性的影响,结果表明,若采用p-壬基酚聚氧化乙烯醚硫酸钠为乳化剂,且UPA用量低于单体总量2．5％(wt)时,可以制得稳定的UPA／丙烯酸酯共聚物乳液。通过对乳液聚合物的红外光谱分析表明,UPA与丙烯酸酯发生了共聚反应。将乙二醇二缩水甘油醚乳化形成水乳液,作为水乳型涂料的第二组分。将两种乳液复合后在室温下干燥成膜,通过对聚合物涂膜的DSC及力学性能的测试表明,双组分体系在成膜过程中发生了交联反应,而未加环氧化合物的单组分聚合物乳液成膜时则不发生交联。研究了不同UPA含量对涂膜拉伸强度的影响,结果表明,在适量UPA用量时可获得最高的涂膜拉伸强度。     

室温交联型双组分丙烯酸系共聚物乳液研究

用马来酸酐和乙二胺合成了含有双键的伯胺化合物(UPA)，并将其与丙烯酸酯进行乳液共聚合制成了双组分室温固化涂料的第一组分。论文研究了乳化剂种类和UPA用量对聚合稳定性的影响。将乙二醇二缩水甘油醚乳化形成水乳液，作为水乳型涂料的第二组分。将两种乳液复合后在室温下干燥成膜，通过对聚合物涂膜的DSC测试表明，双组分体系在成膜过程中发生了交联反应，而未加环氧化合物的单组分聚合物乳液成膜时则不发生交联。论文还研究了UPA含量对涂膜拉伸强度的影响。     

新型水性丙烯酸/环氧杂化乳液的制备及其在水性双组分金属防护涂料中的应用

首先用丙烯酸酯单体和乳化剂预乳化环氧树脂,按照乳液聚合的工艺制备了水性丙烯酸/环氧杂化乳液;研究了杂化乳液合成过程中乳化剂种类和用量、功能单体的用量、乳液p H等参数对乳液性能的影响。在此基础上,使用该杂化乳液配制双组分水性环氧涂料,对涂层性能进行测试。结果表明:所制备水性丙烯酸/环氧杂化乳液具有较优的贮存稳定性,采用该杂化乳液配制双组分水性环氧涂料,涂膜具有优异的综合性能;与传统的双组分水性环氧涂料体系相比,该杂化涂料体系具有更长的适用期、更快的干燥速度,可广泛应用于包括防锈底漆和面漆在内的各种防腐涂料应用领域。     

环氧磷酸酯树脂改性丙烯酸乳液的合成

采用乳液聚合法制备了环氧磷酸酯树脂改性丙烯酸乳液,研究了乳化剂用量、引发剂用量、环氧磷酸酯树脂用量、功能性单体用量、软硬单体配比对乳液性能的影响。结果表明:当乳化剂用量为3.0%、引发剂用量为0.6%、环氧磷酸酯树脂用量为15.0%、甲基丙烯酸用量为2.0%、软硬单体配比为1∶1时,能得到各项性能良好的环氧磷酸酯树脂改性丙烯酸乳液。     

反应型双组分丙烯酸酯乳胶的无皂乳液聚合研究

分别采用含丙烯酰端基的乙二醇－丙二醇共聚物和OP类表面活性剂作为乳化剂，研究了分别含有环氧基团和氨基基团的反应型双组分丙烯酸醋乳胶的乳液聚合的制备工艺和影响因素，比较了复合乳化剂的乳液聚合和无皂乳液聚合两种工艺，研究结果表明，无皂乳液聚合制备的乳液成膜温度低，室温固化交联后有良好的耐水和耐碱性能。     

水性羟基丙烯酸乳液的制备及在双组分水性聚氨酯涂料中的应用

以甲基丙烯酸羟乙酯(HEMA)、苯乙烯(St)、丙烯酸正丁酯(n-BA)、甲基丙烯酸甲酯(MMA)和丙烯酸(AA)为主单体,以过硫酸铵(APS)为引发剂,十二烷基二苯醚二磺酸为乳化剂,碳酸氢钠为缓冲剂,通过半连续乳液聚合工艺合成了双组分水性聚氨酯涂料用丙烯酸乳液。探究了丙烯酸单体用量、T_g、引发剂(APS)用量和乳化剂用量对乳液及涂膜性能的影响。结果表明当丙烯酸单体用量占单体总量的1%(质量分数,后同)、APS占单体总量的1%、乳化剂占3%、T_g设计为30℃时,合成的水性羟基丙烯酸乳液制备双组分聚氨酯涂料,其涂膜附着力好、耐水性好,铅笔硬度可达2H。     

含羟基叔氟微乳液的合成及水性双组分聚氨酯清漆的制备

以叔碳酸乙烯酯、丙烯酸六氟丁酯、含羟基单体、反应型阴离子乳化剂、非离子乳化剂、（甲基）丙烯酸及其酯类单体等为原料制备了新型含羟基叔氟共聚物乳液。考察了反应温度、乳化剂用量、乳化剂配比、引发剂用量、有机氟单体等对乳液聚合过程的影响；并对制备的乳液进行了红外、机械稳定性等的表征，确定了最佳反应条件。利用该新型乳液和水性固化剂，制备了常温固化水性双组分聚氨酯涂料，并进行了测试表征。     

以含氟共聚物为助乳化剂的种子乳液聚合及其制备方法

正以含氟共聚物为助乳化剂的种子乳液聚合及其制备方法,属于化工高分子材料领域。利用含氟共聚物为助稳定剂的种子乳液聚合制备含氟丙烯酸乳液减少了含氟单体的消耗。先将含氟单体和乙烯基类单体或丙烯酸类单体通过自由基聚合合成共聚物;以含氟共聚物作为助稳定剂,采用种子乳液聚合法,合成出含氟丙烯酸乳液。该发明获得的含氟乳液不仅保留了聚丙烯酸乳液良好的成膜性、附着力、保光保     

丙烯酸系乳液共聚物玻璃化温度的研究

论述了丙烯酸系乳液聚合物设计中玻璃化温度（Ｔｇ）的预测。低水溶性的单体、带羧基或羟基官能团的单体和阴离子型乳化剂使共聚物Ｔｇ升高；非离子型乳化剂使共聚物Ｔｇ降低。     

含磷环氧丙烯酸防腐乳液的合成及其涂料的制备

以甲基丙烯酸甲酯、丙烯酸丁酯、甲基丙烯酸、丙烯酸羟乙酯、环氧丙烯酸酯功能单体、磷酸酯功能单体为原料,采用半连续种子乳液聚合法制备含磷含环氧基团的丙烯酸乳液。考察了乳化剂、引发剂、环氧丙烯酸酯、磷酸酯单体不同用量对其漆膜性能的影响,并对乳液的粒径、固含量及漆膜的耐盐水性、附着力等性能进行测试,研究表明:乳化剂用量、引发剂用量、环氧丙烯酸酯用量、磷酸酯单体用量分别为单体总量的3.0%、0.6%、4.0%、4.0%时,可制得性能较好的水性含磷环氧丙烯酸乳液。并将制得的含磷环氧丙烯酸酯乳液配制成防腐涂料,考察它在机械性能、耐水、耐盐水、耐盐雾等方面的性能。     

不同粒径含氟丙烯酸酯共聚乳液的合成及膜表面疏水性能研究

采用半连续种子乳液聚合的方式,以丙烯酸丁酯、甲基丙烯酸甲酯和甲基丙烯酸六氟丁酯为原料制备了粒径分别为30nm、75nm、210nm左右的含氟丙烯酸酯共聚物乳液。通过乳胶粒核壳结构设计与大小粒径乳液机械共混改性2种方法研究了如何在较少含氟单体用量的情况下达到较好的表面疏水性能。利用X射线光电子能谱、动态光散射仪、接触角测定仪等分析手段,研究了共聚物膜的表面性能和共聚物乳液粒径的大小及分布,测试结果表明,核壳结构乳液成膜后壳层含氟量较高,膜表面接触角大于90,°疏水性能强;而大小粒径乳液共混物成膜后表面含氟量较低,却仍能得到90°以上的接触角,表明乳胶膜表面具有粗糙结构,具有一定的仿荷叶效应。     

核-壳结构含氟丙烯酸酯乳液的合成与表征

A fluorine-containing polyacrylate copolymer emulsion was synthesized by a seed emulsion polymerization method, in which methyl methacrylate （MMA） and butyl acrylate （BA） were used as main monomers and hexafluorobutyl methacrylate （HFMA） as fluorine-containing monomer. The structure and properties were characterized by Fourier transform infrared spectrum （FT-IR）, transmission electron microscopy （TEM）, particle size analysis, X-ray photoelectron spectroscopy （XPS）, contact angle （CA）, differential scanning calorimetry （DSC） and thermogravimetry （TG） analysis. The FTIR and TEM results showed that HFMA was effectively involved in the emulsion copolymerization, and the formed emulsion particles had a core-shell structure and a narrow particle size distribution. XPS and CA analysis revealed that a gradient concentration of fluorine existed in the depth profile of fluorine-containing emulsion film which was richer in fluorine and more hydrophobic in one side. DSC and TG analysis also showed that a clear core-shell structure existed in the fluorine-containing emulsion particles, and their film showed higher thermal stability than that of fluorine-free emulsion.     

聚丙烯酸酯乳液的制备及其改性的研究

以丙烯酸酯及其衍生物作为主单体,丙烯酸为官能单体,采用乳液聚合法合成聚丙烯酸酯乳液,并用水性聚氨酯对聚丙烯酸酯乳液进行了改性。研究了搅拌速度、引发剂、丙烯酸和水性聚氨酯的含量对乳液及漆膜性能的影响。结果表明：在搅拌速度为200r／min,引发剂、丙烯酸和水性聚氨酯的含量分别为0．8％、0．3％和40％的条件下得到的乳液的稳定性、外观较好,黏度为88mPa㈦漆膜柔韧性好,附着力为一级。红外光谱分析表明合成了聚丙烯酸酯乳液,改性后的聚丙烯酸酯乳液具有聚丙烯酸酯和聚氨酯的复合结构。     

Synthesis of ambient temperature self-crosslinking VTES-based core–shell polyacrylate emulsion via modified micro-emulsion polymerization process

Modified micro-emulsion polymerization was successfully used to synthesize a kind of ambient temperature self-crosslinking core–shell emulsion, consisting of polyacrylate core and vinyltriethoxysilane (VTES) modified polyacrylate shell, by varying the ratio of soft monomer (BA) and hard monomer (MMA) which is different in the core and shell. The emulsion and its film formed at ambient temperature were characterized by attenuated total reflectance-fourier transform infrared spectroscopy (ATR-FTIR), transmission electron microscopy (TEM), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). Core–shell structure was clearly shown in TEM micrographs, and two distinct glass transition temperatures (T _g) were confirmed by DSC analysis. Lower T _g of core phase analyzed by DSC and self-crosslinking properties of VTES characterized by crosslinking degree cause latex particles form continuous film at ambient temperature. Thermal and mechanical properties and the surface properties of the latex films were also investigated. Results showed that the core–shell latex films containing 5 and 7.5 % VTES exhibited higher thermal stability, better mechanical properties, higher contact angle, and water resistance compared with pure polyacrylate film.     

核壳型聚丙烯酸酯乳液的耐水性能研究

采用种子乳液二阶段聚合法,制备了经丙烯酸(AA)/丙烯酰胺(AM)交联、具有核壳结构的甲基丙烯酸甲酯(MMA)/丙烯酸丁酯(BA)/丙烯腈(AN)复合乳液,研究了核壳软硬单体比、AN及壳层中交联单体AM含量对乳胶膜吸水率的影响。结果表明:乳胶膜吸水率主要受壳层软硬单体比例的影响,软硬单体比值越小,乳胶膜的吸水率越低;丙烯酸/丙烯酰胺复合交联剂对乳胶膜吸水率的影响不明显;功能单体丙烯腈可明显降低乳胶膜的吸水率,乳胶膜吸水率随丙烯腈含量的增加而逐渐降低,最低达到9.40%。     

Controlled preparation and properties of acrylic acid epoxy-acrylate composite emulsion for self-crosslinking coatings

A stable epoxy-acrylate composite latex was successfully prepared through emulsion polymerization of modified epoxy acrylic (EPAC) oligomer with acrylate monomer. The EPAC oligomer was obtained using active acrylic acid (AA) to react with epoxy resin. And by regulating the reaction degree of the active hydrogen of AA and epoxide group, there is the acquisition of terminal double bond that gives EPAC reactivity, together with the partial retention of the epoxide group that enables self-crosslinking during film formation. The structural conformation of the oligomer was ascertained by Fourier transform infrared (FTIR) spectroscopy. The factors influencing the stability of the epoxy-acrylate composite latex were investigated. The epoxy-acrylate composite latex was the most stable when methyl acrylic acid was 1.5 wt% and modified EPAC oligomer was 15 wt% of the total monomer weight. The morphology and property of the composite latex films were characterized by scanning electron microscopy, transmission electron microscopy (TEM), and temperature-modulated differential scanning calorimetry (TOPEM-DSC). The results confirm that there is successful emulsion copolymerization between modified EPAC oligomer and acrylate monomer. TEM show that the particles of epoxy-acrylate composite have a core-shell structure, and there is no free epoxy resin. The FTIR and TOPEM-DSC results reveal that the copolymer emulsion possesses self-crosslinking ability. During film formation, self-crosslinking reaction occurs between epoxide groups with carboxyl groups, giving exothermal phenomena. The thermal stability as well as the corrosion resistance of the films was analyzed. The results show outstanding thermal stability as well as corrosion resistance attributable to the crosslinking reticulation structure. It is envisaged that the epoxy-acrylate composite latex has great potential in the development of high-performance aqueous coatings.     

叔胺型丙烯酸酯共聚物乳液室温可见光交联研究

本研究以甲基丙烯酸甲酯、丙烯酸丁酯、N -羟甲基丙烯酰胺、甲基丙烯酸二甲氨基乙酯为共聚单体进行乳液聚合制备叔胺基丙烯酸酯共聚物乳液 ,然后在该共聚物乳液中加入光敏性乙烯基不饱和单体和可见光下分解的光敏引发剂 ,共混物涂膜于自然光下室温固化交联。考察了光敏引发剂用量、交联单体种类和用量、交联时间对乳胶膜交联程度的影响。结果表明 ,以异丙基硫杂蒽酮为光引发剂 ,分别以甲基丙烯酸缩水甘油酯、三丙二醇二丙烯酸酯及三羟甲基丙烷三丙烯酸酯为交联单体时 ,乳胶膜交联度在 0 5～ 1h内 >70 % ,2h内 >80 %。     

EA/St-AN互穿聚合物网络的加工和力学性能

以丙烯酸乙酯为软单体 ,苯乙烯和丙烯腈为硬单体 ,二乙烯基苯或三乙二醇双丙烯酸酯为交联剂 ,采用多步种子乳液聚合技术制备了半互穿和全互穿聚合物网络 ,研究了软、硬单体配比 ,交联剂用量 ,加工次数对共聚物流变行为、力学性能和结构形态的影响。结果表明 ,制备的半互穿和全互穿聚合物网络均可在适宜的条件下流动成型。如果配方选择适当 ,反复加工后力学性能基本不变     

新型低温型聚丙烯酸酯乳液的合成

采用种子乳液聚合法合成新型低温反应型聚丙烯酸酯乳液粘合剂,即以丙烯酸丁酯（BA）、丙烯酸异辛酯（EHA）、苯乙烯（St）为软、硬单体,丙烯酸（AA）为功能单体,以过硫酸钾为引发剂,并选用一种适当的交联单体合成了性能优良的聚丙烯酸酯涂料印花粘合剂。讨论了引发剂用量、乳化剂用量、阴／非离子乳化剂的配比、乳液滴加时间、保温时间等对聚合物的影响。确定了乳液聚合最佳工艺条件：乳化剂用量为o8％,阴／非乳化剂质量比为4：3,引发剂用量为0．8％,乳液滴加时间60min,保温时间60min。