私密直播全婐app免费大渔直播,国产av成人无码免费视频,男女同房做爰全过程高潮,国产精品自产拍在线观看

當(dāng)前位置:> 首頁 > 論文著作 > 正文
A Facile Route to Polydivinylbenzene Hollow Microspheres with Pyridine Group Located on Their Interior Surfaces
作者:Guoliang Li, Xinlin Yang*, Feng Bai
關(guān)鍵字:Polymer capsule; Hollow polymer microspheres; Pyidine group; Distillation precipitation polymerization
論文來源:期刊
具體來源:Polymer, 48 (11), 3074-3081 (2007). DOI: 10.1016/j.polymer.2007.03.066
發(fā)表時(shí)間:2007年
Poly(divinylbenzene) (PDVB) hollow microspheres with pyridyl group located on their interior surface were prepared by a facile route with the aid of the vinyl groups on the surface of poly(methacrylic acid) (PMAA) microspheres, which were incorporated through the hydrogen-bonding interaction between the carboxylic acid group and pyridyl group of 4-vinylpyridine (VPy). Poly(methacrylic acid)@polydivinylbenzene (PMAA@PDVB) coreeshell structure microspheres with PMAA as core and PDVB as shell were synthesized by a two-stage distillatione precipitation polymerization technique through the capture of the DVB monomer from solution of the reactive vinyl groups on pyridyl-functionalized
PMAA microspheres based on a seeded-nucleation mechanism during the second-stage polymerization. The PDVB hollow microspheres with different shell thicknesses were developed after the PMAA core particles were removed by selective dissolution under basic condition in ethanol, during which the pyridyl group was left on the interior surface of the shell layer in PDVB hollow microspheres. The resultant coreeshell and hollow microspheres were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), dynamic light scattering (DLS), Fourier transform infrared spectra (FT-IR) and elemental analysis.
主站蜘蛛池模板: 临澧县| 碌曲县| 彭阳县| 巴南区| 广水市| 九龙县| 恭城| 高清| 航空| 昭觉县| 汉中市| 铜陵市| 藁城市| 禄丰县| 贵定县| 三河市| 平顺县| 合作市| 古浪县| 新兴县| 黄冈市| 陵川县| 旺苍县| 偃师市| 突泉县| 千阳县| 江阴市| 佛学| 双鸭山市| 通道| 祁阳县| 五寨县| 临湘市| 扎囊县| 呼伦贝尔市| 涟源市| 韶山市| 永定县| 本溪| 义马市| 阳山县|