TAILIEUCHUNG - Báo cáo hóa học: " Influence of Nanogels on Mechanical, Dynamic Mechanical, and Thermal Properties of Elastomers"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Influence of Nanogels on Mechanical, Dynamic Mechanical, and Thermal Properties of Elastomers | Nanoscale Res Lett 2009 4 420-430 DOI s11671-009-9262-5 NANO EXPRESS Influence of Nanogels on Mechanical Dynamic Mechanical and Thermal Properties of Elastomers Suman Mitra Santanu Chattopadhyay Anil K. Bhowmick Received 6 October 2008 Accepted 27 January 2009 Published online 13 February 2009 to the authors 2009 Abstract Use of sulfur crosslinked nanogels to improve various properties of virgin elastomers was investigated for the first time. Natural rubber NR and styrene butadiene rubber SBR nanogels were prepared by prevulcanization of the respective rubber lattices. These nanogels were characterized by dynamic light scattering atomic force microscopy AFM solvent swelling mechanical and dynamic mechanical property measurements. Intermixing of gel and matrix at various ratios was carried out. Addition of NR gels greatly improved the green strength of SBR whereas presence of SBR nanogels induced greater thermal stability in NR. For example addition of 16 phr of NR gel increased the maximum tensile stress value of neat SBR by more than 48 . Noticeable increase in glass transition temperature of the gel filled systems was also observed. Morphology of these gel filled elastomers was studied by a combination of energy dispersive X-ray mapping transmission electron microscopy and AFM techniques. Particulate filler composite reinforcement models were used to understand the reinforcement mechanism of these nanogels. Keywords Nanogels Elastomers Gels Mechanical properties Thermal properties Electronic supplementary material The online version of this article doi s11671-009-9262-5 contains supplementary material which is available to authorized users. S. Mitra S. Chattopadhyay A. K. Bhowmick El Rubber Technology Centre Indian Institute of Technology Kharagpur 721302 India e-mail anilkb@ Introduction Virgin polymers especially elastomers have inherently low stiffness and strength. In order to overcome these obvious limitations and to expand

TÀI LIỆU LIÊN QUAN
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.