文化大學機構典藏 CCUR:Item 987654321/2772
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    題名: Mechanical properties of blocked polyurethane/epoxy interpenetrating polymer networks
    作者: Chen CH
    Sun YY
    貢獻者: 材料所
    關鍵詞: interpenetrating polymer networks (IPNs)
    mechanical properties
    polyurethanes
    epoxy
    日期: 2006
    上傳時間: 2009-11-20 13:37:34 (UTC+8)
    摘要: The mechanical properties of blocked polyurethane(PU)/epoxy interpenetrating polymer networks (IPNs) were studied by means of their static and damping properties. The studies of static mechanical properties of IPNs are based on tensile properties, flexural properties, hardness, and impact method. Results show that the tensile strength, flexural strength, tensile modulus, flexural modulus, and hardness of IPNs decreased with increase in blocked PU content. The impact strength of IPNs increased with increase in blocked PU content. It shows that the tensile strength, flexural strength, tensile modulus, and flexural modulus of IPNs increased with filler (CaCO3) content to a maximum value at 5, 10, 20, and 25 phr, respectively, and then decreased. The higher the filler content, the greater the hardness of IPNs and the lower the notched Izod impact strength of IPNs. The glass transition temperatures (T-g) of IPNs were shifted inwardly compared with those of blocked PU and epoxy, which indicated that the blocked PU/epoxy IPNs showed excellent compatibility. Meanwhile, the T was shifted to a higher temperature with increasing T-g filler (CaCO3) content. The dynamic storage modulus (E') of IPNs increased with increase in epoxy and filler content. The higher the blocked PU content, the greater the swelling ratio of IPNs and the lower the density of IPNs. The higher the filler (CaCO3) content, the greater the density of IPNs, and the lower the swelling ratio of IPNs. (c) 2006 Wiley Periodicals, Inc.
    關聯: JOURNAL OF APPLIED POLYMER SCIENCE Volume: 101 Issue: 3 Pages: 1826-1832
    顯示於類別:[化學工程與材料工程學系暨碩士班] 期刊論文

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