色谱

色谱 ›› 2011, Vol. 29 ›› Issue (05): 462-465.DOI: 10.3724/SP.J.1123.2011.00462

• 技术与应用 • 上一篇    

反相气相色谱法表征聚丁二烯橡胶的表面性质

王强1, 马凤云2, 田华1, 宋玉萍3, 徐文清3, 唐军1*   

  1. 1. 新疆大学理化测试中心, 新疆 乌鲁木齐 830046; 2. 新疆大学化学化工学院, 新疆 乌鲁木齐 830046; 3. 独山子石化设计院, 新疆 独山子 833600
  • 收稿日期:2011-01-18 修回日期:2011-04-06 出版日期:2011-05-28 发布日期:2011-05-28
  • 通讯作者: 唐军,硕士,高级工程师,主要从事分析化学与高分子化学研究工作. Tel: (0991)8583278-8323
  • 基金资助:
    国家科技支撑计划项目(2007BAE32B00)和“十一五”新疆维吾尔自治区科技攻关项目(200732139).

Characterization of surface properties of polybutadiene rubber by inverse gas chromatography

WANG Qiang1, MA Fengyun2, TIAN Hua1, SONG Yuping3, XU Wenqing3, TANG Jun1*   

  1. 1. Center for Physics and Chemistry Analysis, Xinjiang University, rümqi 830046, China; 2. College of Chemistry and Chemical Engineering, Xinjiang University, rümqi 830046, China; 3. Dushanzi Petrochemical Design Industry, Dushanzi 833600, China
  • Received:2011-01-18 Revised:2011-04-06 Online:2011-05-28 Published:2011-05-28

PDF

536

被引次数

19

摘要： 采用反相气相色谱技术测定了聚丁二烯橡胶的表面性质。以正己烷、正庚烷、正辛烷、正壬烷作为非极性探针测定其表面色散自由能,以二氯甲烷、三氯甲烷、丙酮、乙酸乙酯、乙醚和四氢呋喃作为极性探针测定其路易斯酸碱常数。经计算得出聚丁二烯橡胶在303、313、323、333和343 K的表面色散自由能分别为47.07、46.46、45.85、45.60和45.09 mJ/m2。结果表明,聚丁二烯橡胶表面色散自由能随着温度的升高呈线性降低,路易斯酸常数Ka为0.34,碱常数Kb为1.77,总酸碱作用能力2.11,该聚合物为弱碱性Lewis两性聚合物材料。此外还计算出聚丁二烯橡胶的酸碱作用吸附自由能（~ΔGsa）和吸附焓（~ΔHsa）。

关键词: 表面自由能, 反相气相色谱, 聚丁二烯橡胶, 酸碱常数

Abstract: Inverse gas chromatography was applied to the characterization of the surface properties of polybutadiene rubber (PBR). Four n-alkanes (C6, C7, C8 and C9-alkanes) were chosen as the apolar probes to characterize the dispersive component of surface free energy. Dichloromethane, trichloromethane, acetone, ethyl acetate, diethylether and tetrahydrofuran were chosen as the polar probes to detect the Lewis acid-base parameters. It was found that the dispersive components of surface free energy were 47.07, 46.46, 45.85, 45.60 and 45.09 mJ/m2 at 303, 313, 323, 333 and 343 K, respectively. The results showed that the surface free energy decreased linearly with the increase of temperature. The Lewise acidic number Ka of PBR was 0.34, and the basic number Kb was 1.77. The fact Kb/Ka＞1 means that the surface of PBR was amphoteric with dominant basic character and the total ability of the surface to acid-base interactions was 2.11. The free energies of adsorption~ΔGsa and ~ΔHsa by Lewis acid-base interaction were also figured out.

Key words: acid-base parameters, polybutadiene rubber, inverse gas chromatography (IGC), surface free energy