多元醇配位体改性三氯化铝催化1-癸烯齐聚产物分析

聚α-烯烃合成油(Polymer Alpha olefins,简称PAO),是一类性能高的润滑剂与官能液,也是饱和烯烃的低聚物。其中,α-烯烃(主要为C_8~C_(12))的三、四聚体是合成润滑油基础油最主要的原料,且具有很高的粘度指数、低的倾点。主要选用1-癸烯为原料烯烃,通过加入多元醇配位体对三氯化铝进行改性,研究三氯化铝改性的催化剂对α-烯烃催化的齐聚反应的最佳工艺条件,计算齐聚产物的收率。     

乙烯基酯树脂的合成及性能

以双酚Ａ型环氧树脂与甲基丙烯酸为原料合成了乙烯基酯树脂、论述了反应温度、催化剂用量对反应收率和产物性能的影响,并用ＴＤＩ、ＭＤＩ进行改性,对其性能进行了测试。     

Hydrophilic UV-curable PU resins for PET micro-fiber applications

Hydrophilic UV-curable PU oligomers (UV-PU) were prepared by mixing either the toluene diisocyanates (TDI) with polyethylene glycol-1000, or the isophorone diisocyanate (IPDI) with polypropylene glycol-1000 and dimethylol propanic acid (DMPA), to produce the desired carboxylic acid bearing or non-ionic PU oligmer (NCO-PU), separately. The 2-hydroxyethyl methacrylate (HEMA) was then added into the NCO-PU oligomer to form acrylate-terminated (UV-curable) PU oligomer (UV-PU). The reactive diluents, such as 1,6-hexanediol diacrylate (HDDA), trimethylolpropane tricarylate (TMPTA) and others were used to adjust the viscosity of UV-PU and to control the concentration of acrylic group. The hydrophilic UV-curable PU system was formulated and applied on PET micro-fiber and then cured by an UV-radiation at ambient temperature. The physical, thermal, and mechanical properties, in particular, the hydrophilic properties of UV-curable PU treated PET micro-fibers will be discussed.     

Synthesis of water dispersible magnetite nanoparticles in the presence of hydrophilic polymers

Water dispersible magnetite nanoparticles (Fe₃O₄) were synthesized by thermal decomposition of iron (III) acetylacetonate (Fe(acac)₃) in the presence of carboxylic acid-terminated poly(ethylene glycol) (mPEG acid), poly(vinyl alcohol) and NH₂-containing polyether. Crystal structure was investigated using X-ray diffractometry (XRD) and it showed that the as-synthesized particles had high crystallinity with distinct lattices. Particle size of the nanoparticles was investigated using XRD (15.32 nm), transmission electron microscopy (18.8 nm) and photo correlation spectroscopy (32 nm) techniques. Vibrating sample magnetometry indicated that magnetite nanoparticles exhibited superparamagnetic behavior at room temperature. Influence of each functional group on magnetic properties of the particles was also examined. These magnetite nanoparticles remained dispersible in aqueous dispersions with only 5% particles aggregating after 1 month of preparing.     

Preparation of New Benzoylthiourea-functionalized PVC Resin and Investigation of the Complexation Properties

Poly(vinyl chloride) (PVC) have been modified, using a two-step process with amine and benzoyl isothiocyanate groups. In the present paper, PVC-N,N′-(3,3′-(ethane-1,2-diyl bis(azanediyl))bis (propane-3,1-diyl))bis(azanediyl)bis(thioxomethylene) dibenzamide one have been synthesized. Its complexes have been prepared with CoCl₂, NiCl₂, PtCl₂ and HgCl₂. These compounds have been characterized by elemental analysis, FT-IR, UV-VIS, TGA, SEM, ^IH NMR.     

聚己内酯改性研究进展

介绍了聚己内酯(PCL)的改性目的,综述了PCL的改性方法,包括将PCL与聚合物共混或共聚、在PCL中填充无机粒子或纤维,以及PCL的成纤改性和表面改性等,并指出了PCL改性的发展方向。     

改性聚磷酸铵对三嗪类膨胀阻燃聚丙烯性能的影响

由改性聚磷酸铵(APP)、自制的三嗪类成炭发泡剂(CFA)等复配制成膨胀型阻燃剂(IFR),以二氧化硅、二氧化钛等为协效剂阻燃聚丙烯(PP)。研究了不同组分的IFR及协效剂对阻燃PP复合材料阻燃性能、力学性能和耐水性能的影响。结果表明:改性APP的亲水性下降;由改性APP/CFA(4/1)、二氧化硅协效剂复配的PP复合材料阻燃性能、力学性能优良,助剂在PP基体中分散性好,热水浸泡后氧指数为32.5%,仍能达到UL94V—1级,失重率为2.92%。     

植物纤维与生物降解塑料界面相容性研究进展

分析了植物纤维/生物降解塑料界面的相容性及影响因素,从植物纤维表面改性处理和生物降解塑料改性处理两方面介绍了改善植物纤维与生物降解塑料界面相容性的方法,并展望了生物降解塑料的发展趋势。     

丙烯腈-N-苯基马来酰胺-苯乙烯三元共聚物改性ABS

采用丙烯腈-N-苯基马来酰胺-苯乙烯三元共聚物对ABS 757树脂进行改性,从而提高ABS树脂的热性能,同时ABS树脂的拉伸强度增大,硬度增大,而且ABS树脂向高刚性、高模量的方向发展.丙烯腈-N-苯基马来酰胺-苯乙烯三元共聚物中N-苯基马来酰胺的含最对共混物的熔体质量流动速率有很大的影响,通过改变三元共聚物中N-苯基马来酰胺的含量,可使共混树脂的加工性能得到提高.     

熔融接枝改性PVC树脂的研究

采用熔融接枝法制备了接枝聚氯乙烯(PVC)材料,研究了引发剂DCP、接枝单体MMA对PVC接枝物力学性能、耐热性、硬度及微观形态结构的影响。结果表明:接枝改性后PVC材料的力学性能、硬度均有所提高,具有较稳定的耐热性。在引发剂DCP用量为0.9%、接枝单体MMA用量为9%时,材料的综合性能达到最佳。