N-丁基马来酰亚胺/苯乙烯共聚物的合成与表征

以十二烷基硫酸钠和正戊醇为复合乳化剂,配制了含有Ｎ－丁基马来酰胺亚胺和苯乙烯的水包油型微乳液。用过硫酸钾引发该体系进行微乳液共聚合,考察了单体配比对共聚物组成,、玻璃化转变温度和特性粘数的影响。同时用红外光谱、核磁共振氢谱和热重法等对共聚物进行表征,结果表明,当单体ＮＢＭＩ摩尔分离在一定范围内变时,用微乳液聚法法制备的ＮＢＭＩ／Ｓｔ具有交替共聚结构,所合成的共聚物具有良好的耐热性能。     

不饱和聚酯/苯乙烯无皂乳液共聚合与聚合物微凝胶

以羧基封端的不饱和聚酯（ＵＰ）和苯乙烯（Ｓｔ）为单体进行了无皂乳液共聚合,制备了聚合物微凝胶,提出了ＵＰ－Ｓｔ无皂乳液聚合的成核机理,讨论了ＰＨ值、ＵＰ／Ｓｔ等因素对体系稳定性和微凝胶产率的影响,该聚合物微凝胶能明显提高ＵＰ的冲击强度。     

偏氯乙烯/丙烯腈/苯乙烯悬浮共聚合动力学

本文研究了偏氯乙烯（ＶＤＣ）／丙烯腈（ＡＮ）／苯乙烯（Ｓｔ）三元悬浮共聚合体系的聚合机理、共聚速率、非聚物组成及其特性粘度的影响因素。实验表明随着投料配比的改变,可分成四个不同聚合机理区域。Ｓｔ对ＶＤＣ／ＡＮ／Ｓｔ三元悬浮共聚有缓聚作用。ＶＤＣ三元悬浮共聚速率可用半经验模型,ｄＣ／ｄｔ＝αＣ＾β「Ⅰ」ｏ＾γｅｘｐ（－γｋｄｔ）描述,由实验得到模型参数γ值为２．２４,模型参数α、β是聚合温度与引发剂浓度的函数。ＶＤＣ－ＡＮ－Ｓｔ三元悬浮共聚物存在着较宽的ＶＤＣ组成分布,并受到单体ＡＮ水溶性的影响,经ＡＮ动态相平衡校正后,可预测ＶＤＣ三元共聚物组成。ＶＤＣ－ＡＮ－Ｓｔ共聚物的特性粘度随着转化率的升高而增大。在相同引发剂用量下,高转化率ＶＤＣ－ＡＮ－Ｓｔ共聚物特性粘度的对数与温度的倒数成线性关系。     

无皂乳液聚合制备阳离子功能性微示研究

苯乙烯（Ｓｔ）／丙烯酸丁酯（ＢＡ）体系在无乳化剂的条件下分别与少量的自制的Ｎ，Ｎ－二甲基，Ｎ－丁基，Ｎ－甲基丙烯酰氧乙基溴化铵（ＤＢＭＥＡ）、Ｎ，Ｎ－二甲基，Ｎ－丁基，Ｎ－（３－甲基丙烯酰胺基）丙基溴化铵（ＤＢＭＰＡ）进行共聚，难过离子交换－－电导滴定确定了两体系微球表面基团及粒子表面电荷密度，认为微球大小及表面电荷密度主要由引发剂浓度、共聚单体浓度、离子强度、Ｓｔ／ＢＡ主单体比及单体加料方式决定     

N—丁基马来酰亚胺的微乳液聚合研究：Ⅰ合成与表征

配制了ＳＤＳ／ＮＢＭＩ／Ｈ２Ｏ三组分Ｏ／Ｗ微乳液。以过硫酸钾为引发剂,首次用微乳液聚合法合成了聚Ｎ－丁基马来酰亚胺,并用ＩＲ、ＤＳＣ、ＴＧ等对聚合物进行了表征     

人造丝绸植物花卉上光乳液的研制

以丙烯酸丁酯（ＢＡ）、苯乙烯（Ｓｔ）及丙烯腈（ＡＮ）为主单体，Ｎ，Ｎ－亚甲基双丙烯酰胺（ＤＡＭ）为交联单体，衣康酸（ＩＡ）和Ｎ－羟甲基丙烯酰胺（ＮＭＡ）为官能单体，研制出一种人造丝绸植物花卉上光乳液，讨论了各组分对乳液性能的影响。实验结果表明：该胶综合性能优良，能够满足生产人造丝绸植物花卉的需要。     

中空聚合物乳胶粒子的制备

研究了在制备中空乳胶粒子的过程中,复合乳液（苯乙烯（Ｓｔ）－丙烯酸丁酯（ＢＡ）－甲基丙烯醛（ＭＡ））进行种子聚合时,Ｓｔ／ＢＡ的质量比和ＭＡ的用量对胶乳粒子的空径、粒径和表面羧基质量摩尔浓度的影响。实验结果表明,当Ｓｔ／ＢＡ的质量比为１９,ＭＡ质量分数为单体的５．６％时,形成的乳胶粒子的空径最大。     

对称型双端过渡态丁二烯／苯乙烯嵌段共聚物的研制：Ⅰ.共聚合 …

以比卤代烷烃取代型双锂齐聚物为引发剂、环已烷为溶剂,丁二烯（Ｂ）、苯乙烯（Ｓ）单体采用１次加入的方法,合成了对称型双端过渡 丁二烯／苯乙烯嵌段共聚物Ｓ－（Ｓ／Ｂ）－Ｂ－（Ｂ／Ｓ）－Ｓ,并对双锂体系本二烯、苯乙烯共聚合反应过程进行了研究,将丁二烯、苯乙类共聚合反应动力学数据进行了分段处理,求得不同引发温度、不同单体配比、不同极性添加剂用量「二乙二醇二甲醚（２Ｇ）／Ｌｉ」下丁二烯聚合段、苯乙烯聚合段假     

镧系金属化合物催化苯乙烯和双烯烃的共聚──苯乙烯和异戊二烯共聚合制备高顺式－1，4嵌段共聚物

采用稀土催化体系Ｎｄ（Ｆ_３ＣＯ_２）_３－ＢｒＣ_５Ｈ_（１１）－Ｒ_ｍＡｌＨ_（３－ｍ）（Ｎｄ－Ｂｒ－Ａｌ），以甲苯为溶剂，在５０℃恒温水浴中进行苯乙烯（Ｓｔ）和异戊二烯（Ｉｐ）共聚合。结果表明，由Ａｌ（Ｏｃｔ）－３组成的催化体系可制备以顺式－１，４结构为主的共聚物；在后者组成的催化体系中，当Ａｌ／Ｎｄ＝５（摩尔比，下同），Ｂｒ／Ｎｄ＝５时，聚合活性最高。经ＩＲ，ＮＭＲ检测表征了共聚物的微观结构。同时，用π－烯丙基型配位机理和返扣配位机理对实验结果进行了定性解释。     

明胶／（丙烯酸丁酯—丙烯腈）接枝共聚及乳液稳定性的研究

研究了明胶浓度，引发剂浓度、单体总浓度以及单体配比（ＢＡ／ＡＮ）等因素对明胶／丙烯酸丁酯－丙烯腈）「Ｇｅｌ／（ＢＡ－ＡＮ）」三元接枝共聚反应的影响，提示出了其内在的规律；另外还对Ｇｅｌ－ｇ－ｐ（ＢＡ－ＡＮ）三元接枝共聚物乳液在常温、冷冻以及补加明胶不溶液等条件下的稳定性进行了研究，找出了提高乳液稳定性行之有效的方法。     

苯乙烯/N-丁基马来酰亚胺共聚合研究

以偶氮二异丁腈为引发剂,采用溶液聚合法合成了苯乙烯/N-丁基马来酰亚胺共聚物.详细研究了聚合温度、引发剂用量、单体配比对共聚合动力学的影响,并对共聚机理进行了初步探讨.     

Synthesis,characterization and properties of functionalized styrene–maleimide copolymers

New functionalized styrene–maleimide copolymers were prepared by free radical copolymerization of styrene (St) and N‐4‐carboxybutylmaleimide (NBMI) in chloroform, using 2,2′‐azobisisobutyronitrile (AIBN) as initiator. Monomer and copolymer characterization was carried out by ¹H‐ and ¹³C‐NMR. Copolymer composition was determined by elemental analysis and Fourier‐transform infrared (FTIR) spectroscopy. The glass transition temperature (from DSC) and the thermogravimetric analysis (TGA) of the copolymers were consistent with the thermal behavior and stability observed for alternating St–maleimide copolymers. St–NBMI copolymers crosslinked with divinylbenzene (DVB) were also synthesized and their cation exchange properties evaluated in order to assess the capacity of the new copolymers to bind metallic ions. Copyright © 2005 Society of Chemical Industry     

Reactivity ratios of free monomers and their charge‐transfer complex in the copolymerization of N‐butyl maleimide and styrene

As for the charge‐transfer complex (CTC) formed by N‐butyl maleimide (NMBI) and styrene in chloroform, the complex formation constant was determined by ¹H‐NMR of Hanna–Ashbaugh. The copolymerization of NBMI (NBMI, M₁) and styrene (St, M₂) in chloroform using AIBN as an initiator was investigated. On the basis of the kinetic model proposed by Shan, the reactivity ratios of free monomers and CTC in the copolymerization were calculated to be r₁₂ = 0.0440, r₂₁ = 0.0349, r_1C = 0.00688, r_2C = 0.00476, and the ratios of rate constants were obtained to be k_1C/k₁₂ = 6.40, k_2C/k₂₁ = 7.33. In addition, the copolymer was characterized by IR, ¹H‐NMR, DSC, and TGA. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 83: 3007–3012, 2002; DOI 10.1002/app.2330     

苯乙烯与N－苯基马来酰亚胺本体共聚合动力学

研究了Ｎ－苯基马来酰亚胺在苯乙烯中的溶解度和络合性能，以及聚合温度、Ｎ－苯基马来酰亚胺浓度、引发剂种类及浓度、加料方式等因素对共聚合速率的影响，进一步分析和计算该体系的动力学和热力学参数。     

Synthesis,characterization, and properties of amphiphilic block copolymer of acrylamide‐styrene by self‐emulsifying microemulsion method

The copolymerization system of acrylamide (AM) and styrene (St) was acquired by using amphiphilic block copolymer PAM‐b‐PSt with lower molecular weight as polymeric surfactant, and then the microemulsion phase diagram was drawn. The appropriate copolymerization systems were chosen in the phase diagram, and higher molecular weight amphiphilic block copolymers PAM‐b‐PSt were prepared by self‐emulsifying microemulsion method. The chemical composition and structure of the products were analyzed by FTIR, ¹H‐NMR, ¹³C‐NMR, GPC, and UV; the block structure of products was characterized by DSC, and the hydrophobic association property of the products was studied by the fluorescence probe and rotating viscosity measurement. The results showed that O/W microemulsion was also acquired by using the polymeric surfactant; 3 g polymeric surfactant was only used to disperse 0.25 g St into aqueous solution, which showed higher emulsifying efficiency. At the same time, the use of self‐emulsifying microemulsion copolymerizing system can avoid back treatment of small molecular surfactant and the purified block polymer was prepared in one step; the prepared copolymers have good hydrophobic association properties and their aqueous solution showed evident viscosity increment. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009     

Study on microemulsion polymerization of N‐butyl maleimide

By using sodium dodecyl sulfate (SDS) as an emulsifier, polymerization of N‐butyl maleimide (NBMI) was carried out in ternary oil‐in‐water microemulsion, initiated with potassium persulfate (KPS). The kinetics of microemulsion polymerization were measured by dilatometry. The effects of initiator concentration, polymerization temperature, monomer concentration, and emulsifier concentration on polymerization kinetics were investigated. On this basis, the polymerization kinetics were discussed. The experiment result showed that the microemulsion polymerization kinetics of N‐butyl maleimide were almost consistent with the prediction of the Smith‐Ewart theory in conventional emulsion polymerization, except that the emulsifier showed a special effect on polymerization. At the same time, the polymer was characterized by IR, ¹H‐NMR, DSC, and TGA. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 805–809, 2000     

苯乙烯/丙烯酸丁酯微乳液聚合竞聚率及共聚物链段分布的研究

以苯乙烯/丙烯酸丁酯(St/BA)为共聚单体进行了微乳液聚合反应,测定了共聚物组成和共聚单体的竞聚率。由竞聚率计算了共聚物分子的链段分布,分析了共聚物分子的微观结构。     

纳米材料催化马来酰亚胺共聚反应

研究了用复合纳米ＴｉＯ２催化的马来酰亚胺的共聚反应。经差热分析、预聚体的溶解性及凝胶特性测试结果表明：引入单马来酰亚胺与双马来酰亚胺进行共聚,可降低共混和的熔点及提高预聚体的溶解性;使用复合纳米ＴｉＯ２作催化剂,能显著降低共聚树脂的固化温度。上述改进将明显改善以马来酰亚胺树脂为基体的复合材料的加工性能。     

N-丁基马来酰亚胺/丙烯酸丁酯的共聚研究

研究了N-丁基马来酰亚胺与丙烯酸丁酯的溶液共聚,考察了原料配比、反应温度和溶剂极性等因素对共聚反应的影响,并用IR、DTA和特性粘数[η]等对共聚产物进行了表征。