Xia ZHOU
,
Jinzong YANG
,
Qin GAO
,
Guohui QU
材料科学技术（英文）
The heat hardening mechanism of starch composite binder for sand mold (core) was studied by way of IR spectra. It is thought that the bonding strength of molding sand is mainly depended on the strength of the adhesive membrane itself. During heating the binder at certain temperature between 160 similar to 200 degreesC for one hour, a special composite structure is formed because of the interactions between different components, thus, it has higher low-temperature drying strength, better humidity resistance and higher high-temperature strength.
关键词:
Xia ZHOU
,
Jinzong YANG
,
Guohui QU
材料科学技术（英文）
Interactions between different components in α-starch based composite binder for green sand mould/core were investigated by using XRD, IR spectra, 1H NMR spectra and SEM. Several adhesive hardening structures and theories of the binder at room temperature were proposed according to the interactions between various compositions. Thus, the reasons for the binder to have excellent combination properties and unique adhesive bonding and self-curing characteristics were explained by these theories successfully. And the theories are of great directive importance to design and development of composite binder for green sand mould/core.
关键词:
α-Starch based composite binder
,
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,
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