- 1、本文档共5页,可阅读全部内容。
- 2、有哪些信誉好的足球投注网站(book118)网站文档一经付费(服务费),不意味着购买了该文档的版权,仅供个人/单位学习、研究之用,不得用于商业用途,未经授权,严禁复制、发行、汇编、翻译或者网络传播等,侵权必究。
- 3、本站所有内容均由合作方或网友上传,本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺!文档内容仅供研究参考,付费前请自行鉴别。如您付费,意味着您自己接受本站规则且自行承担风险,本站不退款、不进行额外附加服务;查看《如何避免下载的几个坑》。如果您已付费下载过本站文档,您可以点击 这里二次下载。
- 4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等,请点击“版权申诉”(推荐),也可以打举报电话:400-050-0827(电话支持时间:9:00-18:30)。
查看更多
ATRP实验步骤
Abstract
Surface initiated polymerization (SIP) is an emerging powerful tool to modify and tailor the surface properties of nanoparticles. Among different methods of SIP, surface initiated atom transfer radical polymerization (SI-ATRP) has several strategic advantages over other methods of polymerizations. This investigation reports the preparation and characterization of poly(2-ethylhexyl acrylate) (PEHA)/clay nanocomposite from nanoclay surface via SI-ATRP and poly(2-ethylhexyl acrylate)-block-poly(methyl methacrylate) (PEHA-b-PMMA)/clay nanocomposite via conventional ATRP. To carry out SI-ATRP, the nanoclay (Cloisite Na+) surface was first modified by incorporating an ATRP initiator (2-bromopropionyl bromide) to nanoclay surface via a grafting reaction. The prepared bromo-functionalized nanoclay (Clay–Br) was then used to carry out SI-ATRP of 2-ethylhexyl acrylate (EHA) at 90 °C using CuBr as catalyst in combination with N, N, N′, N″, N″- pentamethyl diethylenetriamine (PMDETA) as the ligand. The macroinitiator (clay-PEHA-Br) was used to prepare PEHA-b-PMMA/clay nanocomposites via conventional ATRP using the same reaction conditions as SI-ATRP of EHA. A series of PEHA-b-PMMA/clay nanocomposites were prepared via ATRP. The prepared PEHA/clay nanocomposites and PEHA-b-PMMA/clay nanocomposites were characterized by WAXD and TEM analyses. DSC analysis of PEHA-b-PMMA/clay nanocomposites showed two Tg values corresponding to two blocks present in the block copolymers. TGA analysis was also carried out to study the thermal stability of PEHA/clay nanocomposites and PEHA-b-PMMA/clay nanocomposites at different nanoclay loading. The chemical structure and molecular weights of the prepared polymers were analyzed by Fourier transform infrared (FT-IR), 1H NMR, and gel permeation chromatography (GPC) analyses.
2.1 Materials
Unmodified nanoclay, Cloisite Na+ (gallery spacing (d001) = 11.7 ?, moisture 4–9%, weight (%) loss on ignition = 7%, density = 2.86 g/cm3, surface area 75
您可能关注的文档
- 走向未来第一册优质教案集1-5单元.doc
- warriors of net翻译.docx
- 英文部专职译员远程测试题201111.doc
- 词组短语总结辨析.doc
- 高中译林牛津英语模块四Unit1教案.docx
- CAF覆铜板玻纤纱漏电的原因及测试.docx
- 配置Juniper文档.doc
- 耿立品 大学英语专业毕业论文(全).doc
- 现代英语词汇学概论最强版复习资料chapter10.docx
- 特殊翻译英语.doc
- 10《那一年,面包飘香》教案.docx
- 13 花钟 教学设计-2023-2024学年三年级下册语文统编版.docx
- 2024-2025学年中职学校心理健康教育与霸凌预防的设计.docx
- 2024-2025学年中职生反思与行动的反霸凌教学设计.docx
- 2023-2024学年人教版小学数学一年级上册5.docx
- 4.1.1 线段、射线、直线 教学设计 2024-2025学年北师大版七年级数学上册.docx
- 川教版(2024)三年级上册 2.2在线导航选路线 教案.docx
- Unit 8 Dolls (教学设计)-2024-2025学年译林版(三起)英语四年级上册.docx
- 高一上学期体育与健康人教版 “贪吃蛇”耐久跑 教案.docx
- 第1课时 亿以内数的认识(教学设计)-2024-2025学年四年级上册数学人教版.docx
文档评论(0)