Thermal and mechanical properties of random copolymers of diisopropyl fumarate with 1-adamantyl and bornyl acrylates with high glass transition temperatures

2016 ◽  
Vol 55 (2) ◽  
pp. 288-296 ◽  
Author(s):  
Akikazu Matsumoto ◽  
Takayuki Sumihara
Keyword(s):  
Mechanical Properties ◽  
Glass Transition ◽  
Random Copolymers ◽  
Transition Temperatures ◽  
Thermal And Mechanical Properties ◽  
Glass Transition Temperatures

Glass Transition Temperature, Mechanical Properties of Rice and their Relationships with Milling Quality

2012 ◽  
Vol 8 (3) ◽  
Author(s):  
Kobra Tajaddodi Talab ◽  
Mohd. Nordin Ibrahim ◽  
Sergey Spotar ◽  
Rosnita A. Talib ◽  
Kharidah Muhammad
Keyword(s):  
Mechanical Properties ◽  
Glass Transition ◽  
Moisture Content ◽  
Bending Strength ◽  
Bending Test ◽  
Transition Line ◽  
Transition Temperatures ◽  
Drying Process ◽  
Glass Transition Temperatures ◽  
Grain Moisture

Abstract Glass transition temperatures (Tg) of MR219 rice variety were measured by differential scanning calorimeter (DSC). State diagram was developed and used to evaluate drying process in this study. Glass transition temperatures range of 9.65- 61.79°C were observed for gains with moisture content of 26.8 – 7.4% (w.b.). For mechanical properties and milling test, statistical analysis was performed by using a two factor experiment in completely randomized design (CRD). Two selected factors were drying temperatures at 5 levels (40, 45, 50, 55, and 60°C) and final moisture content (FMC) at 4 levels (10-10.5, 11-11.5, 12-12.5 and 13-13.5%). Three–point bending test was applied to measure the mechanical properties of rice kernel. Generally, bending strength, apparent modulus of elasticity and fracture energy of brown rice kernel increased with decreasing the grain moisture content. Maximum bending strength was 35.69 and 33.64 MPa for 55, and 60°C, respectively. All samples that were dried at 55 and 60°C experienced to go through the glass transition line after reaching their temperature to the room temperature at the end of drying process. The effect of drying temperature, paddy FMC and their interactions on whole kernel percentage (WKP) and mechanical properties were significant (α = 0.05). An inverse relationship was observed between WKP and the percentage of strong kernels for all treatments.

Structure-Property Relationship in Rubber-Modified Propylene-Ethylene Block Copolymer Blends

1988 ◽  
Vol 61 (5) ◽  
pp. 747-759 ◽  
Author(s):  
M. M. Sain ◽  
I. Hudec ◽  
J. Beniska ◽  
P. Rosner
Keyword(s):  
Mechanical Properties ◽  
Glass Transition ◽  
Block Copolymer ◽  
Strong Interaction ◽  
Transition Temperatures ◽  
Structure Property ◽  
Glass Transition Temperatures ◽  
Copolymer Blends ◽  
Structure Property Relationship ◽  
Plastic Components

Abstract The incorporation of a phase modifier, as is well known in the case of elasto-plastic blends, leads to an improvement of mechanical properties and brittleness character for PRP-EVA blends. Similarly, the influence of a cocuring agent and a phase modifier on NR-PRP blends also improved the mechanical properties. Although the modification of the PRP-EVA blend has very little influence on glass transition temperatures, the NR-PRP blends show a measurable shift in their glass-transition temperatures. It is demonstrated that strong interaction occurs between the elastic and plastic components of the blends. Further, it has been shown that this interaction is responsible for improved properties of the blends over that of the pure polymer components.

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