Grafting of polymers from clay nanoparticles via in situ free radical surface-initiated polymerization: Monocationic versus bicationic initiators

Xiaowu Fan, Chuanjun Xia, Rigoberto C. Advincula

研究成果: Article査読

115 被引用数 (Scopus)

抄録

Surface-initiated polymerization (SIP) from clay nanoparticles was compared between surface-bound mono- and bicationic free radical initiators. Distinct properties in molecular weight (MW), extent of exfoliation, and particle morphology were observed as a consequence of using two different initiator architectures. X-ray diffraction (XRD) results showed that the clay intercalated with monocationic initiator has a larger d spacing and gave a more ordered structure. IR, X-ray photoelectron spectroscopy, and qualitative thermogravimetric analysis confirmed the attachment of both initiators. XRD further showed that the SIP product from the bicationic initiator retained some intercalated structure while a highly exfoliated structure is achieved by the SIP through the monocationic initiator. Consequently the monocationic initiator gave a higher MW polymer. We have found that well-dispersed intercalated clay particles and efficient monomer diffusion are crucial factors in performing a successful SIP and in achieving an exfoliated clay structure.

本文言語English
ページ(範囲)4381-4389
ページ数9
ジャーナルLangmuir
19
10
DOI
出版ステータスPublished - 2003 5 13
外部発表はい

ASJC Scopus subject areas

  • 医学(全般)
  • 材料科学(全般)
  • 凝縮系物理学
  • 表面および界面
  • 分光学
  • 電気化学

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