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Micro‐gels for impact protection
Author(s) -
Zhou Chao,
Wang Bo,
Zhang Fengtao,
Xu Kun,
Han Changyu,
Hu Hong,
Liu Yanpin,
Wang Pixin,
Xin John H.
Publication year - 2013
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.39453
Subject(s) - materials science , silanol , rheology , izod impact strength test , composite material , copolymer , polymer , extender , polyurethane , chemical engineering , polymer science , ultimate tensile strength , chemistry , organic chemistry , catalysis , engineering
A novel kind of impact protective material, named as impact protective micro‐gel (IPM), was synthesized via a precipitation copolymerization of a compound containing boron and silanol. Diphenylmethane diisocyanate (MDI) was introduced as the chain extender to enhance its impact protective performance. Its rheological properties and morphology were investigated. Three‐dimensional (3D) spacer warp‐knitted fabrics were dip‐coated with the IPM made with and without use of MDI, and the impact protective performance of 3D finished fabrics was assessed by drop impact tests. The results show that the adjustment of the MDI content can adjust the real cross‐linking density of the IPM due to the entanglement of polymer chains, and an appropriate cross‐linking density can endow dilatant properties to the IPM samples. The results also show that the impact protective performance of 3D spacer fabrics finished with the IPM can be significantly improved. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 2345–2351, 2013