Morphology and mechanical properties of semi-interpenetrating polymer networks from polyurethane and benzyl konjac glucomannan

Polymer ◽  
2002 ◽  
Vol 43 (14) ◽  
pp. 3979-3986 ◽  
Author(s):  
Yongshang Lu ◽  
Lina Zhang
Keyword(s):  
Mechanical Properties ◽  
Polymer Networks ◽  
Konjac Glucomannan ◽  
Interpenetrating Polymer Networks ◽  
Morphology And Mechanical Properties

scholarly journals Simultaneous and Gradient IPN of Polyurethane/Vinyl Ester Resin: Morphology and Mechanical Properties

2009 ◽  
Vol 2009 ◽  
pp. 1-6 ◽  
Author(s):  
Dongyan Tang ◽  
Xiaohong Zhang ◽  
Lili Liu ◽  
Liangsheng Qiang
Keyword(s):  
Mechanical Properties ◽  
Vinyl Ester ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Component Ratio ◽  
Vinyl Ester Resin ◽  
Time Intervals ◽  
Atomic Force ◽  
Gradient Component ◽  
Morphology And Mechanical Properties

A series of polyurethane (PU) and vinyl ester resin (VER) simultaneous and gradient interpenetrating polymer networks (represented as s-IPN and g-IPN, resp.) curing at room temperature were prepared by changing the component ratios of PU or VER in s-IPN, time intervals, and component ratio sequences of s-IPN in g-IPN. The microstructures of s-IPN and g-IPN were detected by atomic force microscope (AFM), dynamic mechanical analyzer (DMA), and surface constitution scanning of nitrogen element of energy dispersive X-ray spectrum (EDX), respectively. The mechanical properties of s-IPN and g-IPN were studied by values in strain-stress curves detected by electronic multipurpose tester. The results indicated that the morphology and mechanical properties are both affected by PU/VER component ratios in s-IPN, gradient time intervals, and gradient component ratio sequences. Furthermore, the morphology detection by EDX and mechanical properties study both proved the formation of gradient structures in transition regions of g-IPN.

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