scholarly journals Dynamic Young’s modulus, morphological, and thermal stability of 5 tropical light hardwoods modified by benzene diazonium salt treatment

BioResources ◽  
2011 ◽  
Vol 6 (1) ◽  
pp. 737-750 ◽  
Author(s):  
Md. Saiful Islam ◽  
Sinin Hamdan ◽  
Md. Rezaur Rahman ◽  
I. Jusoh ◽  
Abu Saleh Ahmed ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Diazonium Salt ◽  
Treated Wood ◽  
Untreated Wood ◽  
Morphological Properties ◽  
Dynamic Young’S Modulus ◽  
Dynamic Young's Modulus ◽  
Benzene Diazonium

In this study the tropical light hardwood species jelutong (Dyera costulata), terbulan(Endospermum diadenum), batai (Paraserianthes moluccana), rubberwood (Hevea brasiliensis), and pulai (Alstonia pneumatophora) were treated with benzene diazonium salt to improve their dynamic Young’s modulus (Ed), and thermal stability. Benzine diazonium salt reacted with cellulose in wood and produced 2,6-diazocellulose by a coupling reaction, as confirmed by Fourier transform infrared (FTIR) spectroscopy. Values of Ed were calculated from the free-free flexural vibration method and found to increase on treatment. The morphological properties were studied by FTIR and scanning electron microscopy (SEM) and found to be changed. Thermal properties of treated wood samples were evaluated by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The treated wood samples exhibited an increased thermal stability relative to the untreated wood samples; this increase may be related to the formation of 2, 6-diazo cellulose compound.

A method for determining the dynamic Young's modulus of curvilinear specimens

1975 ◽  
Vol 9 (2) ◽  
pp. 286-290
Author(s):  
S. S. Abramchuk ◽  
V. S. Shirokolava ◽  
V. L. Polyakov
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Dynamic Young’S Modulus ◽  
Dynamic Young's Modulus

Correlation Analysis between Dynamic Young’s Modulus and Static MOE of the Poplar LVL Reinforced with Multilayer Fiberglass Mesh

2010 ◽  
Vol 26-28 ◽  
pp. 936-939
Author(s):  
Li Zhang ◽  
Ying Cheng Hu
Keyword(s):  
Correlation Analysis ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Dynamic Properties ◽  
Longitudinal Vibration ◽  
Flexural Vibration ◽  
Transmission Method ◽  
Vibration Method ◽  
Dynamic Young’S Modulus ◽  
Dynamic Young's Modulus

In this paper, the poplar LVL was reinforced with multilayer fiberglass mesh. The reinforcing effect of adding position of fiberglass mesh on improving the static MOE was studied. And three different nondestructive testing (NDT) methods, such as the longitudinal transmission method, longitudinal vibration method and flexural vibration method (out-plane and in-plane), were used to test the dynamic properties of the reinforced poplar LVL. The correlation analysis was implemented between the dynamic Young’s modulus and the static MOE of the reinforced poplar LVL. It can be concluded that the three NDT methods are useful for predicting the MOE of reinforced LVL, but the flexural and longitudinal vibration methods had better accuracy to estimate the MOE.

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