Cao
su nitrile (NBR) được dùng chủ yếu trong các ứng dụng kháng dầu. Có nhiều dạng
biến thể của cao su nitrile, một trong số đó là HNBR. Các tính chất chung của
loại cao su này được trình bày bên dưới.
…
The
most important chemical modification is hydrogenation of the NBR so that little
of the unsaturation remains. This results in a product with much improved
resistance to oxidation and weathering, but with little or no sacrifice of
other useful properties. Hydrogenated nitrile rubber (HNBR) is produced by a
catalytic solution hydrogenation of the butadiene unsaturation in the polymer.
Owing to the largely saturated backbone of the rubber it has significantly
better high temperature and ageing resistance compared to NBR. As in NBR, HNBR
with different ACN contents is also available. Finally, versions of HBNR
containing incorporated methacrylic acid are available. This acid functionality
leads to excellent polymer-filler interaction in compounds. Applications for
HNBR take advantage of the excellent resistance to organic fluids. However, the
increased high temperature performance of the HNBR makes it far superior to NBR
in critical applications.
…
Trích đăng từ sách Rubber
Technologist’s Handbook, Sadhan K. De và Jim R. White, Smithers
Rapra Technology, trang 69, 2001
Nguồn:
www.books.google.com.vn
(vtp-vlab-caosuviet)
