石蜡聚苯乙烯微球的制备

通过悬浮聚合技术合成了石蜡聚苯乙烯微球，研究了合成过程中引发剂浓度及交联剂用量对微球粒径及其分布的影响。     

原子转移自由基聚合法制备聚乳酸三嵌段共聚物的研究

以自制的双端羟基聚乳酸与α-溴代丙酰溴反应而制得的含溴端基的聚乳酸为大分子引发剂,溴化亚铜/2,2′-联吡啶为催化体系,研究了N-乙烯基吡咯烷酮的原子转移自由基聚合行为,制得了具有两亲性聚乳酸嵌段共聚物。随单体/引发剂摩尔比的增大、聚合温度的升高,共聚物溶液的特性黏度增大,共聚物薄膜的吸水率增加;共聚物在不同降解介质中的降解规律相似,均随降解时间的延长,共聚物薄膜的失重增加,且在不同介质中呈现的降解速率表现为碱液>酸液>水>缓冲液。对聚合物进行了结构表征。     

过氧化二碳酸双（2-乙基）己酯的合成研究

以氯甲酸(2-乙基)己酯为原料制备过氧化二碳酸双(2-乙基)己酯(EHP)，研究了加料方式、反应温度、反应时间、投料比等因素对产品的影响。结果表明：氯甲酸(2-乙基)己酯与过氧化钠的摩尔比为1：0．58～0．62，反应温度为15℃～20℃，反应时间为3～4小时，以异十二烷为溶剂，可以得到高效、无毒的EHP溶液。     

聚丙烯的官能化及其与尼龙66相容性研究

对聚丙烯（PP）进行官能化，并研究了接枝单体含量，引发剂含量，螺杆转速对接枝率和熔体流动速率的影响。再将不同接枝率的PP与尼龙66共混，研究了接枝率对共混物力学性能及相容性的影响；用扫描电子显微镜观察了共混物的形态，与未增容共混体系相比，增容后共混体系分散相尺寸明显减小，增容共混物的形态依赖于增容剂在共混物中的含量，增容剂的分子量及官能化基团的含量。     

PAA·2HC1—RH体系引发DMDAAC—AM共聚合的动力学研究

合成了二甲基二烯丙基氯化铵—丙烯酰胺共聚物 ,测定了水溶性偶氮化合物 -RH引发体系 (PAA·2HCl-RH)和过硫酸钾 -RH引发体系 (KPS -RH)引发共聚反应时单体DM和AM的竞聚率 ,以及PAA·2HCl-RH体系用于DM -AM共聚时的活化能。结果表明 :PAA·2HCl-RH引发DM -AM共聚时 ,DM和AM的竞聚率分别为 0 .174和 6 .8,活化能为 33.2 5kJ/mol;而KPS -RH引发DM -AM共聚时 ,DM和AM的竞聚率分别为 0 .0 76和 7.1。     

氧化还原引发降解天然橡胶与丙烯酸酯共聚的研究

研究了降解天然橡胶胶乳与丙烯酸甲酯、丙烯酸丁酯的聚合，以过氧化苯甲酰—N，N—三甲基苯胺(BP0—DMA)为氧化还原引发剂，考察了不同反应温度、引发剂配比、乳化剂用量及加料方式对单体转化率和接枝率的影响；用红外光谱对共聚物进行了表征。结果表明，采用乳化还原引发剂可使聚合反应低温快速进行，过量还原剂起阻聚作用，采用复合乳化剂可提高聚合反应速度和乳液稳定性，补加料可提高接技率。     

On the inhibiting effect of phenolic compounds in the photopolymerization of acrylates under high‐intensity and polychromatic UV/visible lights

The photopolymerization of wood coatings under UV and visible light in industrial type conditions has been investigated. The inhibiting effect of the phenolic compounds found in wood extractives, especially quercetin, on the final properties of the coating (hardness, gel content) as well as the polymerization kinetics (rates, final conversion) has been discussed. Model clear‐coating formulations — based on an acrylate oligomer, a reactive diluent and a bis‐acylphosphine oxide as photo‐initiator — have been used. This article focuses on the influence of the nature of the acrylate oligomer (polyester, epoxy, polyurethane), the type of phenolic derivative (POHs) and the irradiation conditions (UV conveyor, Xe lamp). It appears that lead to through the strong inner‐filter effect in the presence of quercetin is responsible for the loss of all the observed properties. In order to mimic what happens at the wood–coating interface, the role of the diffusion of the phenolic derivatives have been also investigated and discussed. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 3285–3298, 2007     

Neutral Pd(II) and Ni(II) Acetylide Initiators for Polymerization of (Dimethylamino)ethyl Methacrylate

A series of air-stable, late transition, metal-based initiators with the structures ML₂(CCR)₂ (M=Pd and Ni; L=PPh₃ and Pn-Bu₃; R=Ph and CH₂OH) for the polymerization of (dimethylamino)ethyl methylate (DMAEMA) were developed. Transition metal, phosphine, alkynyl, as well as solvents exhibited significant influence on the polymerization. Among them, Pd(CCPh)₂(PPh₃)₂ (PPP) shows the highest activity in CHCl₃ for DMAEMA polymerization. The PDMAEMA obtained is a syndiotactic polymer with high number-average molecular weight (M_n) of 20.2 × 10⁴. A free radical polymerization mechanism with some ATRP characteristics was proposed for the present polymerization.     

氯化聚乙烯接枝氯乙烯聚合速率及传热

本文用气相色谱技术研究氯化聚乙烯(CPE)-接枝(g)-氯乙烯(VC)聚合动力学,对不同引发剂体系分析热负荷分布,并对7 m~3聚合釜传热面进行校核。     

Synthesis and kinetic studies of UV‐curable urethane‐acrylates

The UV‐curable urethane‐acrylates based on 2‐hydroxyethyl methacrylate (HEMA)‐terminated polyurethane (PU) for lithographic and coating applications are investigated in this study. Series of PU prepolymers were made from 4,4‐diphenyl methane diisocyanate (MDI), poly(propylene oxide) glycol (PPG 400), poly(butylene adipate)glycol (PBA 500), or poly(tetramethylene oxide) glycol (PTMO 1000) and are terminated with HEMA. The 2,2‐azobisisobutyronitrile (AIBN) was used as a UV‐initiator under air atmosphere. The curing kinetics of HEMA‐terminated PU film were studied. The curing analysis, using FTIR and reaction kinetics, indicate the reaction rate equation correlates well with the film thickness [T], initiator concentration [I], unreacted double bond concentration [C?C], and exposed energy [E] of the reaction system. The kinetic rate equation for the UV‐curable reaction can be written as © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 91: 3162–3166, 2004