国产精品视频一区二区三区四,亚洲av美洲av综合av,99国内精品久久久久久久,欧美电影一区二区三区电影

您好, 歡迎來到化工儀器網(wǎng)

| 注冊| 產(chǎn)品展廳| 收藏該商鋪

13810654275

technology

首頁   >>   技術文章   >>   Covalently closed microemulsions in presence of triblock terpolymers

北京東方德菲儀器有限公司

立即詢價

您提交后,專屬客服將第一時間為您服務

Covalently closed microemulsions in presence of triblock terpolymers

閱讀:2800      發(fā)布時間:2009-5-4
分享:

Abstract:
This paper is focused on the influence of polystyrene (PS)–poly(1,4-butadiene) (PB)–poly(ethylene oxide) (PEO) triblock terpolymers on the w/o microemulsion of the pseudo-ternary system water/sodium dodecylsulfate (SDS)/xylene-pentanol. Despite the insolubility of the copolymer in
water as well as in the xylene–pentanol mixture, it can be incorporated into the w/o microemulsion and interactions between the triblock terpolymer molecules and the anionic surfactant headgroups can be detected by differential scanning calorimetry (DSC) measurements. Furthermore, dynamic
light scattering measurements were used to determine the aggregate diameter of the modified microemulsions. For lower polymer concentrations large aggregates between 100 and 500 nm can be observed. Surprisingly, at a higher terpolymer concentration of 5 wt%, significant smaller
aggregate diameters can be identified by dynamic light scattering and Cryo-SEM. One can conclude that the copolymers are incorporated in the inverse microemulsion droplets, where the PB blocks cover the water droplets. The thermally induced radical cross-linking of the butadiene units in the presence of azobisisobutyronitrile (AIBN) leads then to covalently closed nanocapsules with an average size of 10 nm.
Keywords:Triblock terpolymer; Microemulsion; Nanocapsules

會員登錄

請輸入賬號

請輸入密碼

=

請輸驗證碼

收藏該商鋪

標簽:
保存成功

(空格分隔,最多3個,單個標簽最多10個字符)

常用:

提示

您的留言已提交成功!我們將在第一時間回復您~
在線留言
固阳县| 沁源县| 太谷县| 泽州县| 长沙市| 理塘县| 宣汉县| 内江市| 远安县| 长治市| 嘉禾县| 时尚| 新和县| 田东县| 调兵山市| 师宗县| 汤原县| 隆昌县| 冀州市| 宁阳县| 开封市| 正安县| 克拉玛依市| 华阴市| 乌恰县| 海兴县| 桑植县| 汝阳县| 桦南县| 鄂尔多斯市| 台山市| 定安县| 六安市| 城步| 贵阳市| 河南省| 娱乐| 巴东县| 阜新市| 德昌县| 娱乐|