کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
149875 456439 2012 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of monodispersed polyisoprene–silica nanoparticles via differential microemulsion polymerization and mechanical properties of polyisoprene nanocomposite
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Synthesis of monodispersed polyisoprene–silica nanoparticles via differential microemulsion polymerization and mechanical properties of polyisoprene nanocomposite
چکیده انگلیسی

Monodispersed polyisoprene–SiO2 nanoparticles were successfully synthesized by a differential microemulsion polymerization of isoprene on silane treated nanosilica. Core–shell morphology was formed consisting of silica as the nano-core encapsulated by polyisoprene (PIP) as the nano-shell, as confirmed by TEM. PIP–SiO2 nanoparticles were produced at 20–60 nm with a narrow size distribution resulting in a reduced nano-SiO2 aggregation in the PIP matrix. The influence of surfactant concentration, monomer/water ratio and SiO2 loading on particle size, monomer conversion as well as grafting efficiency was investigated. The monomer conversion was 87% and the polymer grafting efficiency was as high as 78% at an extremely low surfactant concentration (3 wt.% based on monomer). For rubber applications, the PIP–SiO2 nanocomposite has been used as an effective nano-filler in natural rubber (NR) latex and the NR filled with PIP–SiO2 prevulcanizate clearly showed an improvement in the storage modulus, tensile strength, tensile modulus, and anti-ageing properties.

Figure optionsDownload as PowerPoint slideHighlights
► Polyisoprene (PIP)–SiO2 was synthesized via differential microemulsion polymerization.
► PIP–SiO2 nanoparticles were produced at 20–60 nm with a narrow size distribution.
► Core–shell morphology of nano-SiO2 encapsulated with nanosized PIP was achieved.
► Synthetic PIP–SiO2 could be used as novel reinforcing nanofiller in natural rubber.
► PIP–SiO2 filled NR had high mechanical properties and excellent thermal stability.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volumes 193–194, 15 June 2012, Pages 215–226
نویسندگان
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