徐建军
高分子材料的结构与性能、功能高分子材料、智能高分子材料、化学纤维的成型理论与工艺、高性能纤维的结构性能与应用。
个性化签名
- 姓名:徐建军
- 目前身份:
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学术头衔:
博士生导师
- 职称:-
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学科领域:
材料科学
- 研究兴趣:高分子材料的结构与性能、功能高分子材料、智能高分子材料、化学纤维的成型理论与工艺、高性能纤维的结构性能与应用。
徐建军,男,1959年出生,1982年7月毕业于成都科技大学高材系化纤专业,获工学学士。1986年6月毕业于成都科技大学高材系,获工学硕士,并留校任教。1989年10月至1990年10月为德国Bayreuth大学物理化学系访问学者。1999年3月毕业于香港理工大学应用生物及化学科技学系,获博士学位。2001年8月至2002年9月为加拿大McMaster大学化学工程系博士后研究员。2003年7月晋升为教授。2003年获选为四川省学术技术带头人后备人选,2004年获得博士生导师资格。2004年至今任《纺织高校基础科学学报》副主编。
徐建军教授的主要研究领域为高分子材料的结构与性能、功能高分子材料、智能高分子材料、化学纤维的成型理论与工艺、高性能纤维的结构性能与应用。他主持或参加科研项目近二十项,其中自然科学基金项目4项,国家教委留学回国人员基金1项,省部委重点项目7项,企业横向协作9项。在国内外期刊和学术会议论文集上发表论文37篇,专著1本,其中被SCI收录6篇,EI收录2篇。一些论文被国际同行多次引用。
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徐建军, 巢永烈, 丁旭艳, 粱星, 韩晓莉
上海口腔医学,2001,10(2):119~121,-0001,():
-1年11月30日
目的 研究真空烧结粉末冶金法制作钛合金试件的力学性能。方法 采用真空烧结粉末冶金法制作钛合金试件,测试钛合金试件的抗压强度和弯曲强度。结果 在100-300MPa范围内,烧结体的抗压强度为111-921MPa,随着成形压力的增大,烧结体的抗压强度增大;采用的3种钛粉末粒度对烧结体的力学性能没有影响;钛粉镀铜镀锡组烧结体的抗压强度较其它粉末配方组大。在150~250MPa范围内。烧结体的三点弯曲强度为102~183MPa,弯曲弹性模量为12193~26630;不同配方组的烧结体弯曲强度有差异(P<0.05),而弯曲弹性模量无差异(P>0.05)。结论钛基金属粉末的配方及成形压力对烧结体的力学性能有影响,对钛粉进行化学镀铜镀锝处理是改善钛粉的压制性能、烧结性能。提高烧结体力学性能的理想方法。
真空烧结, 粉末冶金, 钛合金, 力学性能
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徐建军, 李守群, 叶光斗, 何云, 李黎, 王志金
合成纤维工业,2006,29(2):5~7,-0001,():
-1年11月30日
通过甲醇溶剂冻胶纺丝制备水溶温度为5-80℃聚乙烯醇(PVA)水溶纤维,采用X射线衍射、双折射、电子强伸仪等测定了PCA水溶纤维的结晶度、取向度、应力应变曲线。讨论了PVA水溶纤维的结构与力学性能的关系。结果表明:纤维的结晶度和取向度随拉伸倍数的增加而增加,拉伸倍数为16时,纤维力学性能良好,纤维结构均匀,水溶温度范围宽。
聚乙烯醇纤维, 水溶纤维, 冻胶纺丝, 结构, 力学性能
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徐建军, 曾慧, LI Pei
四川大学学报(工程科学版),2001,33(1):73~77,-0001,():
-1年11月30日
采用偶氮对2-脒基丙烷盐酸盐(V-50)为引发剂通过无乳化剂乳液聚合方法制备尺寸均一的阳离子型聚甲基苯乙烯(PMS)胶乳粒子。详细讨论聚合条件,如引发剂浓度、单体浓度、离子强度、搅拌速度对聚合速率、粒子尺寸及分布的影响。最终获得制备单分散无乳化剂阳离子型聚甲基苯乙烯胶乳粒子的方法。
无乳化剂乳液聚合, 聚甲基苯乙烯, 胶乳粒子
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徐建军, 曾慧
四川大学学报(工程科学版),2000,32(6):63~66,-0001,():
-1年11月30日
采用电导法、紫外光谱法、GPC和电子显微镜等方法对甲基苯乙烯和苯乙烯的无乳化剂乳液聚合进行了较为详细的研究。探讨了这两种单体在无乳化剂乳液聚合初期的引发成核机理,比较了它们在无乳化剂乳液聚合时的异同。甲基苯乙烯的无乳化剂聚合机理与苯乙烯类似,即采用胶束成核机理聚合。但是,由于甲基苯乙烯有较低的活化能和链增长速率常数,使其在聚合初期有较高的转化率和更加显著的水相终止。所以在相同的条件下,甲基苯乙烯比苯乙烯有较大的胶乳粒子尺寸。
无乳化剂乳液聚合, 聚甲基苯乙烯, 胶乳粒子
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徐建军, Pei Li, *, † Jianjun Xu, † Qun Wang, † and Chi Wu‡
Langmuir 2000, 16, 4141-4147,-0001,():
-1年11月30日
Controlled synthesis of aldehyde-functional poly(methystyrene) (PMS) latexes in an emulsifier-free system was achieved via an emulsifier-free emulsion polymerization of methylstyrene using V-50 as an initiator, followed byanin-situ surface oxidation catalyzed by copper(Ⅱ) chlorideandtert-butyl hydroperoxide. Our investigation of the effect of oxidant concentration, reaction time, and temperature demonstrated that controlling the surface concentration of aldehyde and carboxylic acid groups was readily accomplished by altering these three reaction parameters. The concentration of the catalyst, however, was found to have little affect on the rate of oxidation. Furthermore, the amounts of surface aldehyde and carboxylic acid groups were determined by conductometric and potentiometric titrations. Electrolyte stability of functionalized latexes was also examined with regard to their critical coagulation concentrations in various salt solutions. Finally,SEMstudies were conducted and clearly showed that surface morphology of functional latexes hardly altered with a low degree of oxidation but became aggregates when highly oxidized latexes were formed.
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【期刊论文】Formation of Highly Monodispersed Emulsifier-Free Cationic Poly(methylstyrene) Latex Particles
徐建军, JIANJUN XU, PEI LI, * CHI WU
Journal of Polymer Science: Part A: Polymer Chemistry, Vol. 37, 2069-2074 (1999),-0001,():
-1年11月30日
Highly monodispersed emulsifier-free poly(methylstyrene) (PMS) latex particles were prepared via an emulsifier-free emulsion polymerization in the presence of 2,29-azobis-(2-amidineopropane) dihydrochloride (V-50) as an initiator. A combination of kinetics and molecular weight distribution studies revealed that the polymerization followed the micellization nucleation mechanism. Results showed that an appropriate initiator concentration was necessary to obtain monodisperse and stable latex particles. Conversion of methylstyrene was found to increase significantly with increasing initiator concentrations. However, the size of PMS latex particles decreased with both the increase of initiator concentration and the reaction temperature at a constant ionic strength. The particle size was increased as the ionic strength of the aqueous phase increased, yet the variation of ionic strength had little effect on the particle size distribution. SEM micrographs showed that an agitation rate of 350 rpm or higher was required in order to produce highly monodispersed poly(methylstyrene) latex particles.
poly(, methylstyrene), , emulsifier-free polymerization, highly monodispersed microspheres
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【期刊论文】Functionalization of poly methylstyrene/ latex particles in an emulsifier-free system
徐建军, Pei Li a, *, Jianjun Xu a, Chi Wu b
Physiochemical and Engineering Aspects 153(1999)363-366,-0001,():
-1年11月30日
methylstyrene.PMS. latex particles in an emulsifier-free emulsion were first synthesized by using 2,29-azobis-2-amidinopropane. dihydrochlorideV-50. as an initiator. Purification of the latexes by dialysis was followed inorder to remove residual monomer, initiator and electrolytes. The cationic polymethylstyrene. latexes were then oxidized in the presence of t-butyl hydroperoxide catalyzed by copper chloride at 608C under air. The degree of oxidation increased with reaction time, but the emulsions of highly oxidized poly methylstyrene. latexes were found to be unstable. An increase of oxidant concentration enhanced the rate of oxidation, while the catalyst concentration had little influence on it. The effect of reaction temperature and pH value on the catalytic oxidation of poly methyl-styrene. latexes was also investigated.
Poly methylstyrene., , Catalytic oxidation, Functional latex particles, Emulsifier-free emulsion
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徐建军, PEI LI, JIANJUN XU, CHI WU
Journal of Polymer Science: Part A: Polymer Chemistry, Vol. 36, 2103-2109 (1998),-0001,():
-1年11月30日
A convenient method of preparing ultrafine poly(methylstyrene) (PMS) latex particles with aldehyde groups on the surface is developed. PMS latexes in the size range 33-81nm were prepared via microemulsion polymerization, using cetyltrimethylammonium bromide (CTAB) as surfactant. The surface of the PMS latexes was oxidized in the presence of tert-butyl hydroperoxide catalyzed by copper(Ⅱ) chloride. As the degree of oxidation increased up to 6h, the amounts of aldehyde group increased. Bigger particles were found to have a slightly higher rate of oxidation than small ones under the same oxidation conditions. The particle size underwent little change during oxidation; thus, the amounts of functional groups and the particle size could be controlled concurrently. Dialysis study of the oxidized PMS microlatexes indicated that the instability of highly oxidized PMS microlatexes was caused by the reduction of total surface charge density due to the presence of carboxylic acid groups.
functionalization of polymer latexes, poly(, methylstyrene), , catalytic oxidation, ultrafine particles
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