Positive effect of functional side groups on the structure and properties of benzoxazine networks and nanocomposites

2019 ◽  
Vol 10 (38) ◽  
pp. 5251-5264 ◽  
Author(s):  
Shamil Saiev ◽  
Leïla Bonnaud ◽  
Camilo Zúñiga ◽  
Philippe Dubois ◽  
David Beljonne ◽  
...  
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Structure And Properties ◽  
Positive Effect

Calculated glass transition temperature of the MDP-a resin obtained through tetra-functional and penta-functional polymerization paths.

The Dynamic Viscoelastic Behavior of Wood-Plastic Composites

2013 ◽  
Vol 815 ◽  
pp. 639-644 ◽  
Author(s):  
Pei Ying Liu ◽  
Zhi Hong Jiang
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Storage Modulus ◽  
Loss Modulus ◽  
Viscoelastic Behavior ◽  
Peak Frequency ◽  
Wood Plastic Composite ◽  
Plastic Composite ◽  
Positive Effect

Wood-plastic composite is a kind of viscoelastic materials. This paper presents the dynamic viscoelastic behavior of WPCs at different temperature, frequency and bamboo flours levels. The storage modulus decreased with the rise of temperature, the loss modulus and tanδ increased as temperature increased but decreased after reaching the peak. Frequency had a little influence on storage modulus and loss modulus, but the glass transition temperature increased with the increase of frequency, while the tanδ decreased. The glass transition temperature of this kind WPCs is about 85°C. The addition of bamboo flours had a positive effect on the dynamic viscoelastic behavior. From the results above, the activation energy of the WPCs was measured using an Arrhenius relationship to investigate the interphase between the wood and plastic.

Evaluation of Influence of the Addition Nanofillers on the Mechanical and Thermal Properties Terpolymers Ester-Ether-Amide

2014 ◽  
Vol 59 (1) ◽  
pp. 237-239
Author(s):  
A. Kozłowska ◽  
M. Piatek-Hnat
Keyword(s):  
Mechanical Properties ◽  
Glass Transition ◽  
Thermal Properties ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Thermoplastic Elastomer ◽  
Nanocomposite Materials ◽  
Polymeric Matrix ◽  
Mechanical And Thermal Properties ◽  
Positive Effect

Abstract The results of studies of mechanical and thermal properties of synthesized elastomeric nanocomposites have been presented. An elastomeric multiblock terpoly(ester-b-ether-b-amide)s as polymeric matrix and nanoparticles SiO2 i TiO2 used as fillers. It was shown that the introduction of multiblock thermoplastic elastomer matrix of SiO2 and TiO2 nanoparticles allows to obtain nanocomposite materials with improved mechanical properties compared to the terpolymer before modification. An increase in glass transition temperature, which has a positive effect for the processing of terpolymers.

Thermoplastic Modification to Konjac Glucomannan with Methyl Acrylate

2009 ◽  
Vol 620-622 ◽  
pp. 133-136 ◽  
Author(s):  
Xue Gang Luo ◽  
Feng Liu ◽  
Zheng Guang Zhang ◽  
Xiao Yan Lin
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Methyl Acrylate ◽  
Graft Copolymerization ◽  
Ammonium Persulfate ◽  
Konjac Glucomannan ◽  
Structure And Properties ◽  
Optimal Conditions ◽  
Grafting Efficiency

A novel thermoplastic konjac glucomannan(TKGM) was synthesized with KGM and methyl acrylate(MA) initiated by ammonium persulfate. The percentage grafting (PG) and the grafting efficiency (GE) was affected by concentration of initiator and monomer, temperature, and time. The results indicated that the percentage grafting (PG) and the grafting efficiency (GE) can attach 70% and 90% at optimal conditions, respectively. The structure and properties of TKGM were characterized by FTIR and DSC. FTIR results demonstrated that graft copolymerization was occurred between MA and KGM. The results of DSC indicated that a new glass transition temperature (Tg) of TKGM at 16.4°C was appeared compared with KGM with no glass transition temperature. It suggested that product of TKGM can be made through thermoplastic process.

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