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Shear viscosity of nylon 6 melts reinforced with microfibrous calcium silicate hydrate
Author(s) -
Tanaka Hideho,
Watanabe Kunio
Publication year - 1999
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.11469
Subject(s) - materials science , silicate , viscosity , shear (geology) , calcium silicate , calcium silicate hydrate , composite material , hydrate , nylon 6 , chemical engineering , mineralogy , polymer , organic chemistry , geology , cement , chemistry , engineering
Steady shear viscosity of nylon 6 melts reinforced with xonotlite, microfibrous calcium silicate hydrate (6CaO · 6SiO 2 · H 2 O), is investigated. The highly filled nylon 6 melt tends to exhibit a yield value, resulting in remarkable viscosity increase particularly at low shear rates. Addition of the xonotlite significantly increases activation energy of viscous flow of the nylon 6 melt, leading the viscosity to be strongly temperature dependent. Comparisons with the melts filled with glass fibers and wollastonite are made. Flow‐induced orientation becomes more important at low volume fractions. Shortening of the xonotlite during shear flow measurement can also be observed.