Thermomechanical properties of polyurethane-shape memory polymer foam.
نویسندگان
چکیده
منابع مشابه
Thermomechanical Properties of TiNi Shape Memory Alloy
The thermomechanical properties of shape memory effect and superelasticity due to the martensitic transformation and the R-phase transformation of TiNi shape memory alloy were investigated experimentally. The transformation line, recovery stress and fatigue property due to both transformations were discussed for cyclic deformation. The thermomechanical properties due to the R-phase transformati...
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Shape memory polymers of polyurethane series have been developed. These polymers have the following features. (1) They can be molded easily similar to conventional plastics, (2) their shape recovery temperature can be set arbitrarily, and (3) they can be colored as required because they are transparent, making a wide range of applications possible. In this paper. the basic characteristics of th...
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The effect of moisture absorption on the glass transition temperature (T(g)) and stress/strain behavior of network polyurethane shape memory polymer (SMP) foams has been investigated. With our ultimate goal of engineering polyurethane SMP foams for use in blood contacting environments, we have investigated the effects of moisture exposure on the physical properties of polyurethane foams. To our...
متن کاملShape xity and shape recovery of polyurethane shape-memory polymer foams
The thermomechanical properties of polyurethane shape memory polymer (SMP) foams were investigated experimentally. The results obtained can be summarized as follows. (1) By cooling the foam after compressive deformation at high temperature, stress decreases and the deformed shape is xed. Stress decreases markedly in the region of temperature below the glass transition temperature Tg during th...
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Polyurethane closed cell (PUCC)/SiO2 nanocomposites have been prepared by using in situ polymerization approach. The third-order optical nonlinearities of PUCC/SiO2 nanocomposites, dissolved in DMF are characterized by Z-scan technique at the measurement wavelength of 532 nm. The nonlinear refractive (NLR) indices and nonlinear absorption (NLA) coefficients of samples were calculated from close...
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ژورنال
عنوان ژورنال: Journal of Advanced Science
سال: 2000
ISSN: 1881-3917,0915-5651
DOI: 10.2978/jsas.12.281