废聚苯乙烯泡沫塑料接枝丙烯酸丁酯改性白乳胶的研制

通过对聚苯乙烯泡沫塑料进行乳化研究，获得了稳定的聚苯乙烯乳液。再采用丙烯酸丁酯（BA）和功能单体对聚苯乙烯进行接枝改性，制成水乳型胶粘剂。研究了溶剂比、乳化剂与稳定剂用量、改性单体及功能单体的用量、引发剂及交联剂用量等因素对粘接性能的影响。     

甲基丙烯酸甲酯/丙烯酸丁酯的无皂乳液共聚

以甲基丙烯酸甲酯(MMA)和丙烯酸丁酯(BA)为主要原料,过硫酸铵为引发剂,进行无皂乳液聚合.结果表明:在不添加乳化剂的情况下,当MMA/BA=1:1、引发剂用量为0.24%、反应温度为80℃、反应时间8.0h时,所得乳液最稳定,单体转化率为81.84%,此无皂乳液对牛皮纸的粘接性比常规乳液好.     

醋酸乙烯酯/马来酸/丙烯酸丁酯无皂共聚乳液研究

采用无皂乳液聚合方法合成聚醋酸乙烯酯/马来酸/丙烯酸丁酯乳液。以透射电镜观察乳胶粒的表面形态并测量粒径,对乳胶粒的增长机理进行了分析。以转化率、吸水性、拉伸强度和乳液的稳定性为主要指标考查了共聚单体用量、pH等因素对乳液性能的影响。结果表明,马来酸占总单体量的3%,丙烯酸丁酯占8%,pH为6时共聚乳液具有良好的性能。     

用废聚苯乙烯泡沫制备无溶剂型聚合物乳液的研究

用废聚苯乙烯泡沫作为主要原料,丙烯酸丁酯、苯乙烯和醋酸乙烯酯作为改性剂制备了一种低成本的无溶剂型聚合物乳液。考察了单体用量及配比,引发剂和复合乳化剂用量及配比对乳液性能的影响,得到实验的最佳工艺条件为:m(十二烷基硫酸钠)∶m(OP-10)=2∶1,w(乳化剂)=3.0%,n(醋酸乙烯酯)∶n(苯乙烯)∶n(丙烯酸丁酯)=1∶1∶2,m(聚苯乙烯泡沫)∶m(复合单体)=1∶2。这种具有粘接强度高,无污染的聚合物乳液可应用于胶粘剂和涂料中。     

用乳液法合成丙烯酸丁酯-甲基丙烯酸共聚胶乳

采用乳液聚合法合成了丙烯酸丁酯和甲基丙烯酸共聚胶乳,用红外光谱对胶乳的结构进行了表征,讨论了加料方式、水油体积比和引发剂与胶乳性能的关系。结果表明,聚合中分3次加料可使反应更平稳地进行;控制水油体积比在1.50左右更易于反应的控制,胶乳性能也较好;引发剂质量分数为0.2%~0.4%时反应体系稳定,胶乳中的单体残留量少,共聚胶乳的性能较好。     

聚苯乙烯——丙烯酸丁酯——丙烯酸的合成及性能研究

利用溶液聚合方法合成了Poly(St-BA-AA）聚合物溶液,研究了聚合条件的变化对聚合物性能的影响。     

丙烯酸接枝改性废聚苯乙烯乳液的研究

介绍了丙烯酸接枝改性废聚苯乙烯泡沫塑料制备乳液型涂料的方法。测定了产物的接枝率、接枝效率、接触角并进行数学处理。推导出的线性回归方程,能通过接触角的测定直接计算出接枝率。     

用废聚苯乙烯泡沫塑料制备水包油乳液

介绍了用废聚苯乙烯泡沫塑料制备水包油乳液的方法，并用离心析水法评价乳液的稳定性。讨论了增粘剂、乳化剂及其用量和分散方式对乳液稳定性的影响。     

利用废聚苯乙烯改性乳液制备防火涂料

介绍了对废聚苯乙烯泡沫塑料进行乳液改性的工艺及不同改性剂的用量对乳液性能的影响。探讨了在利用改性后的乳液制备防火涂料时，各种防火添加剂对涂料防火性能的影响。试验证明，利用废聚苯乙烯泡沫进行乳液改性，采用适当的防火添加剂可制得较理想的防火涂料。     

Preparation and properties of poly(WPSF‐co‐butyl acrylate) copolymer emulsion with ultrasonic radiation II. Monomer conversion rate and characterization

A stable emulsion of poly(WPSF‐co‐butyl acrylate) based on butyl acrylate, waste polystyrene foam was synthesized through emulsion polymerization using sodium dodecyl sulfate and octyl phenyl polyoxyethylene ether as surfactant, ammonium persulfate and sodium hydrogen bisulfate as mixed redox initiator, under ultrasound irradiation in the absence of inert gas. The effects of various copolymerization conditions on the monomer conversion were reported. The copolymers were characterized by means of IR, ¹HNMR, and gel permeation chromatography. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

Preparation and properties of polystyrene‐g‐poly(butyl acrylate) copolymer emulsions with ultrasonic radiation. I. Preparation technology and coagulum ratio

A stable emulsion of polystyrene‐g‐poly(butyl acrylate) was prepared via the following steps: (1) foam polystyrene waste was dissolved in butyl acrylate; (2) the solution was added to an aqueous solution of sodium dodecyl sulfate, ammonium persulfate, and sodium hydrogen bicarbonate; and (3) the mixture was emulsified and graft‐copolymerized by ultrasonic radiation and agitation. Then, the effects of various factors, such as the strength and time of the ultrasonic radiation, the type and dosage of the emulsifier, the concentrations of the initiator and butyl acrylate, the quantity of acrylic acid, and the reaction temperature, on the coagulum ratio were investigated and analyzed. As a result, a suitable technology for reducing the amount of coagulum could be proposed. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 96: 1405–1409, 2005     

PHMS/BA/VAc共聚乳液的研究

采用乳液滴加法将含氢聚甲基硅氧烷(PHMS)、丙烯酸丁酯(BA)和醋酸乙烯酯(VAc)进行乳液共聚,制得了稳定的PHMS／BA,／VAc聚合物乳液。讨论了PHMS和N-羟甲基丙烯酰胺(NMA)的用量对聚合物乳液的表面张力、离心稳定性及粒径大小的影响。结果表明：随着PHMS用量的增加,乳液的表面张力减小,平均粒径增大,稳定性提高;随着NMA用量的增加,平均粒径增大,在一定用量范围内,聚合物乳液的离心稳定性提高。     

水性丙烯酸酯涂料的制备与研究

文章采用半连续乳液聚合工艺,以丙烯酸丁酯、甲基丙烯酸甲酯、甲基丙烯酸为聚合反应的单体,加入乳化剂十二烷基硫酸钠、引发剂过硫酸铵进行丙烯酸酯树脂的制备。在制备的过程中,深入考虑聚合温度、乳化剂和引发剂浓度及用量、搅拌速度的因素条件的影响。严格按照性能的测试标准进行性能的测试分析,对所测得的张力、粘度、红外谱图、粒径分布等性能进行科学的分析。从而得出影响聚合物性能的关键因素条件,改进配方的设计及有目的控制聚合反应的各条件,制出性能优异的产品。     

用WPSt制备大颗粒聚合物P(PS/VAc)的工艺研究

以聚苯乙烯(PSt)泡沫为原料,采用悬浮法制备大颗粒聚合物P(PS/VAc)。着重探讨了分散剂加入方式及用量、引发剂用量、水介质的用量、聚苯乙烯泡沫的用量等对其粒径及分布的影响,确定了产品粒径主要位于2~4mm的聚合工艺条件。     

Ab initio reversible addition–fragmentation chain transfer emulsion polymerization of styrene/butyl acrylate mediated by poly(acrylic acid)‐block‐polystyrene trithiocarbonate

Ab initio reversible addition–fragmentation chain transfer (RAFT) emulsion polymerization of styrene/butyl acrylate was investigated with the trithiocarbonate macro‐RAFT agent poly(acrylic acid)‐block‐polystyrene (PAA‐b‐PS) as a stabilizer and a RAFT agent. Influences of the amount of ammonium persulfate (APS), the amount of PAA‐b‐PS and the mass ratio of monomers on emulsion polymerization and film properties are discussed. The particle morphology exhibited spherical‐like structure with particles of about 90 nm in diameter and relatively narrow particle size distribution characterized using transmission electron microscopy and dynamic laser scattering. Fourier transform infrared and ¹H NMR spectra showed that the styrene/butyl acrylate emulsion was successfully synthesized. The monomer conversion increased initially with increasing amount of APS, from 0.4 up to 0.8 wt%, and then decreased. The particle size increased and its distribution decreased gradually with increasing amount of APS. The monomer conversion increased from 76.83 to 94.21% as the amount of PAA‐b‐PS increased from 3 to 4 wt%, and then decreased with further increase of PAA‐b‐PS. The particle size decreased and its distribution increased with increasing amount of PAA‐b‐PS. The water resistance and solvent resistance of the polymer films initially increased and then decreased with decreasing mass ratio of butyl acrylate to styrene. © 2014 Society of Chemical Industry     

间歇式乳液聚合法制备超支化聚丙烯酸丁酯

以丙烯酸丁酯为单体,二乙烯基苯为支化剂,十二硫醇为链转移剂,通过间歇式乳液聚合法成功制备了一系列高转化率的聚丙烯酸丁酯超支化聚合物。通过核磁共振对其结构进行了表征,同时还对聚合物乳液粒径及其分布,超支化聚合物的溶解性、支化度、相对分子质量及相对分子质量分布进行了研究。结果表明:超支化聚合物分子结构中含有丙烯酸丁酯、二乙烯基苯和十二硫醇;聚合物乳液粒径较小,粒径分布较窄;超支化聚合物在有机溶剂中具有良好的溶解性;随着支化剂用量的增加,聚合物支化度增加,相对分子质量降低,相对分子质量分布变窄;随着链转移剂用量的增加,聚合物支化度增加,相对分子质量分布变窄。     

VAc/BA/NaAA共聚物乳液的合成及性能研究

采用半连续种子乳液聚合法制备了固含量较高（40%）、稳定性较好（常温贮存期6个月以上）的VAc/BA/NaAA共聚物乳液。通过DLS、GPC、接触角测试仪等对乳液粒径、聚合物相对分子质量、接触角进行测试和表征,并测试了乳液保水率、乳胶膜吸水率、拉伸强度等性能。研究结果表明：适量功能性单体的引入,对乳液稳定性、保水性有明显改善;同时乳胶膜的亲水性和力学强度也有所提高。     

VAc/BA/AA共聚乳液胶粘剂的制备与性能研究

以醋酸乙烯酯(VAc)为原料、丙烯酸(AA)和丙烯酸丁酯(BA)为改性单体、过硫酸铵(APS)为引发剂、辛基酚聚氧乙烯醚(OP-10)和烷基酚聚氧乙烯醚琥珀酸酯磺酸钠(MS-1)为新型乳化剂体系,采用半连续种子乳液聚合法制备了VAc/BA/AA共聚乳液胶粘剂。研究了引发剂用量、乳化剂配比及用量、单体及种子单体用量对乳液性能的影响,并采用FT-IR对其结构进行表征。研究结果表明,当m(VAc)∶m(BA)∶m(AA)∶m(APS)∶m(OP-10)∶m(MS-1)=83∶14∶3∶0.4∶1.25∶0.25、w(种子单体)=17%(相对于总单体而言)时,乳液的综合性能最佳。