Humidity response of poly(butylene adipate-co-butylene terephthalate) copolyesters and their composites with wood flour determined by dynamic mechanical analysis

2014 ◽  
Vol 590 ◽  
pp. 40-50 ◽  
Author(s):  
Angela Milinkovic ◽  
Pastorek Miroslav ◽  
Adriana Gregorova
Keyword(s):  
Dynamic Mechanical Analysis ◽  
Wood Flour ◽  
Mechanical Analysis ◽  
Butylene Terephthalate ◽  
Dynamic Mechanical ◽  
Humidity Response

Humidity response of Kraft papers determined by dynamic mechanical analysis

2013 ◽  
Vol 570 ◽  
pp. 33-40 ◽  
Author(s):  
Gregorova Adriana ◽  
Lahti Jussi ◽  
Schennach Robert ◽  
Stelzer Franz
Keyword(s):  
Dynamic Mechanical Analysis ◽  
Mechanical Analysis ◽  
Dynamic Mechanical ◽  
Humidity Response

Material pocket dynamic mechanical analysis: a novel tool to study thermal transition in wood fibers plasticized by an ionic liquid (IL)

Holzforschung ◽  
2015 ◽  
Vol 69 (2) ◽  
pp. 223-232 ◽  
Author(s):  
Rongxian Ou ◽  
Yanjun Xie ◽  
Qingwen Wang ◽  
Shujuan Sui ◽  
Michael P. Wolcott
Keyword(s):  
Phase Transition ◽  
Ionic Liquid ◽  
Dynamic Mechanical Analysis ◽  
Wood Flour ◽  
Mechanical Analysis ◽  
Crystalline Cellulose ◽  
Measured Temperature ◽  
Wood Fibers ◽  
Dynamic Mechanical ◽  
Wood Particles

Abstract The investigation of phase transition in powdered materials by dynamic mechanical analysis (DMA) is not straightforward because powders are difficult to prepare in a solid compact form without altering their structure and properties. In this study, a material pocket (MP) method has been applied to provide physical support to powdered samples for DMA testing (MP-DMA). Poplar wood strips and four types of wood particles [native wood flour (WF), α-cellulose (αC), holocellulose (HC), and particles without hemicelluloses (HR)] were treated with an ionic liquid (IL), 1-ethyl-3-methylimidazolium chloride ([Emim]Cl), to a weight percent gain (WPG) of 36%. Results show that all four [Emim]Cl-treated wood particles exhibited three apparent transition peaks over the measured temperature range. Paracrystalline cellulose, hemicelluloses, and lignin all exhibited a glass transition temperature (Tg) at approximately 85°C due to the plasticizing effect of [Emim]Cl. The transition peak at a higher temperature may be due to the melting of crystalline cellulose in [Emim]Cl. MP-DMA is an effective tool for direct monitoring the phase transition of powdered lignocellulosics. This provides new insight into the interactions of ILs and cell wall polymers, and the method established can be easily extended to other systems based on powdered samples.

Dynamic-mechanical analysis and SEM morphology of wood flour/polypropylene composites

2006 ◽  
Vol 17 (4) ◽  
pp. 315-318 ◽  
Author(s):  
Chui-gen Guo ◽  
Yong-ming Song ◽  
Qing-wen Wang ◽  
Chang-sheng Shen
Keyword(s):  
Dynamic Mechanical Analysis ◽  
Wood Flour ◽  
Mechanical Analysis ◽  
Polypropylene Composites ◽  
Dynamic Mechanical ◽  
Sem Morphology
Sign in / Sign up

Export Citation Format

Share Document