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Synthesis of polymethacrylates Used as Multifunctional Lubricating Oil Additives

China Petroleum Processing & Petrochemical Technology 2015年第2期17卷 69-75页

作者： Liu Yinong Fan Lichuang Duan Qinghua SINOPEC Research Institute of Petroleum Processing

In this paper, four kinds of polymethacrylates(PMAs) used as multifunctional additives were synthesized from quaternary C1—C14 methacrylate, among which sample 4 exhibited relatively better performance. According to the methacrylate ratio of sample 4, the optimized reaction conditions of PMA were explored by orthogonal experiments comprising 4 factors and 3 levels, and the optimized reaction conditions covered an initiator dosage of 0.8 %, a molecular weight regulator dosage of 0.4%, a reaction temperature of 95 ℃ and a reaction time of 8.5 h. When the optimized PMA samples were used to formulate the 75W/90 automotive gear base oil, they exhibited improved shear stability and good low temperature property. In comparison with foreign commercial polymethacrylate GP, the optimized PMA samples exhibited better thickening ability, similar shear stability and slightly weak low temperature property, with their performance being the same as GP's on the whole. The slight difference in the performance between the optimized PMA and GP was attributed to the difference of chain length of copolymers and the distribution of relative molecular mass between them.

关键词： polymethacrylate thickening ability shear stability low temperature property

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SYNTHESIS AND CHARACTERIZATI0N OF polymethacrylateS BEARING HETEROCYCLIC AZO GROUP AND MESOGENIC GROUP FOR NONLINEAR OPTICS

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Chinese Journal of Polymer Science 1998年第1期16卷 38-47页

作者：张会旗李晨曦黄文强印寿根吴强宋正纪何炳林 The State Key Laboratory of Functional Polymer Materials for Adsorption and Separation Institute of Polymer Chemistry Nankai University Tianjin 300071 China Department of Applied Chemistry Tianjin University Tianjin 300072 China Department of Applied Chemistry Tianjin University Tianjin 300072 China The State Key Laboratory of Functional Polymer Materials for Adsorption and Separation Institute of Polymer Chemistry Nankai University Tianjin 300071 China

The methacrylate monomers bearing mesogenic group and heterocyclicazo dye have been synthesized. The monomeric dye was copolymerized with the mesogenicmonomer using a free radical initiator to produce polymers useful for nonlinear optics. Themonomers and polymers were characterized by IR,;H-NMR, and UV-Vis spectra. Theaverage molecular weight （M;and M;） of the polymers were determined by gel permeationchromatography. The thermal properties of the polymers such as thermal stability andphase transition behavior were studied by thermogravimetric analysis, differential thermalanalysis, polarizing optical microscope and X-ray diffractometer. The results demonstratethat the synthesized polymers are crystalline polymers at room temperature and no liquidcrystalline phases were observed for all of them.

关键词： Heterocyclic azo group Mesogenic group Nonlinear optics Liquid crystalline polymers Crystalline polymers polymethacrylate

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Novel Cross-Linked Conducting Polythiophene with Yellow-Green-Light-Emitting Properties and Good Thermal Stability

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Chinese Journal of Chemistry 2011年第9期29卷 1985-1988页

作者： Lai, Cunyuan Guo, Wenjuan Tang, Xinde Zhang, Guangyou Pan, Qiwei Pei, Meishan School of Chemistry and Chemical Engineering University ofJinan Jinan Shandong 250022 China Institute of New Materials Shandong Jiaotong University Jinan Shandong 250023 China

conjugated polythiophene derivative with polymethacrylate attaching to the polymer backbone via an alkyl spacer was successfully synthesized. A methacrylate-substituted thiophene monomer, 3-（hexyl methacry- late）thiophene was prepared and polymerized by free radical polymerization, followed by an electrochemical po- lymerization. The resulting polymer as a yellow-green-light emitter, has potential applications in photoelectronics area.

关键词： polythiophene polymethacrylate radical reactions electrochemistry conducting polymer

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