Effects of curing conditions on the structure of sodium carboxymethyl starch/mineral matrix system: FT-IR investigation
PBN-AR
Instytucja
Wydział Odlewnictwa (Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie)
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy (30pkt w roku publikacji)
ISSN
1386-1425
EISSN
1873-3557
Wydawca
Pergamon-Elsevier Science Ltd.
DOI
Rok publikacji
2018
Numer zeszytu
Strony od-do
236--241
Numer tomu
201
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
0.42
Słowa kluczowe
EN
polymer binders
microwave radiation
spectroscopy
molding sands
crosslinking
modified starch
conventional heating
Streszczenia
Język
EN
Treść
Strength properties of the microwave cured molding sands containing binders in a form of the aqueous solution of sodium carboxymethyl starch (CMS-Na) are higher than the same molding composition cured by conventional heating. Finding the reason of this effect was the main purpose in this study. Structural changes caused by both physical curing methods of molding sands systems containing mineral matrix (silica sand) and polymer water-soluble binder (CMS-Na) were compared. It was shown, by means of the FT-IR spectroscopic studies, that the activation of the polar groups in the polymer macromolecules structure as well as silanol groups on the mineral matrix surfaces was occurred in the microwave radiation. Binding process in microwave-cured samples was an effect of formation the hydrogen bonds network between hydroxyl and/or carbonyl groups present in polymer and silanol groups present in mineral matrix. FT-IR studies of structural changes in conventional and microwave cured samples confirm that participation of hydrogen bonds is greater after microwave curing than conventional heating. © 2018 Elsevier B.V.
Cechy publikacji
original article
peer-reviewed
Inne
System-identifier
idp:114050
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