Effect of mixing conditions on mechanical properties of polylactide/montmorillonite clay nanocomposites

2010 ◽  
pp. n/a-n/a ◽  
Author(s):  
M. Jollands ◽  
Rahul K. Gupta
Keyword(s):  
Mechanical Properties ◽  
Montmorillonite Clay ◽  
Clay Nanocomposites ◽  
Mixing Conditions

Influence of Epoxide Levels in Epoxidized Natural Rubber (ENR) Molecules on Cure Characteristics, Dynamic Properties and Mechanical Properties of ENR/Montmorillonite Clay Nanocomposites

2013 ◽  
Vol 844 ◽  
pp. 247-250
Author(s):  
Piriyapol Yokkhun ◽  
Bencha Thongnuanchan ◽  
Charoen Nakason
Keyword(s):  
Mechanical Properties ◽  
Dynamic Properties ◽  
Montmorillonite Clay ◽  
Layered Silicates ◽  
Clay Nanocomposites ◽  
X Ray Diffraction ◽  
Melt Mixing ◽  
Maximum Torque ◽  
Elongation At Break ◽  
Cure Characteristics

Nanocomposites based on epoxidized natural rubbers (ENRs) with various levels of epoxide groups (i.e., 10, 20, 30, 40 and 50 mol%) and organoclay were prepared by melt mixing process. The organoclay employed in this study was montmorillonite clay modified by octadecylamine (OC-MMT). Cure characteristics, dynamic properties and mechanical properties of ENRs nanocomposites filled with 5 phr of OC-MMT were studied. In all cases, X-ray diffraction results indicated intercalation of ENRs into the silicate interlayer as an increase in the interlayer distance of layered silicates was observed. The maximum torque and torque difference of ENRs nanocomposites increased with increasing levels of epoxide groups in ENRs. Additionally, it was also found that the tan δ value at Tg of the ENR-50 nanocomposite was much lower than those of other types of ENRs nanocomposite. This indicates stronger interaction between ENR-50 and OC-MMT. However, ENR-50 nanocomposite showed the poorest elasticity in term of the tan δ value at the ambient temperature compared to other types of ENRs nanocomposites. A good balance between strength and elasticity was also observed in the ENR-30 nanocomposite. These results are also consistent with the observation that tensile strength and elongation at break of ENR-30 nanocomposite were higher than those of other types of ENRs nanocomposites.

Polyethylene/Clay Nanocomposites Prepared in an Internal Mixer: Effect of Processing Variable on Mechanical Properties

2015 ◽  
Vol 1105 ◽  
pp. 46-50 ◽  
Author(s):  
Onny Ujianto ◽  
Margaret Jollands ◽  
Nhol Kao
Keyword(s):  
Mechanical Properties ◽  
Mixing Time ◽  
Diffusion Mechanism ◽  
Clay Nanocomposites ◽  
Processing Conditions ◽  
Mixing Conditions ◽  
Material Degradation ◽  
Processing Variable ◽  
Internal Mixer ◽  
And Diffusion

Polymer/clay nanocomposites have been explored extensively over the last two decades. Many studies report nanocomposite properties. However, studies on the effect of processing conditions are still limited. This study evaluates the effect of rotor type, rotor rotation (rpm) and mixing time on mechanical properties of polyethylene organoclay composites. Samples were fabricated using two different rotors; roller and Banbury, in an internal batch mixer at various mixing conditions. The analysis shows that the Banbury rotor improved mechanical properties more than the roller rotor. Shear and diffusion mechanism, as well as material degradation, were the controlling factors at different processing conditions.

scholarly journals Effect of Organic Modifier Types on the Physical–Mechanical Properties and Overall Migration of Post-Consumer Polypropylene/Clay Nanocomposites for Food Packaging

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1502
Author(s):  
Eliezer Velásquez ◽  
Sebastián Espinoza ◽  
Ximena Valenzuela ◽  
Luan Garrido ◽  
María José Galotto ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Food Packaging ◽  
Clay Nanocomposites ◽  
Organic Modifier ◽  
Thermal And Mechanical Properties ◽  
Chemical Safety ◽  
Elongation At Break ◽  
Fatty Food ◽  
Recycled Plastics ◽  
Thermal Stability Of

The deterioration of the physical–mechanical properties and loss of the chemical safety of plastics after consumption are topics of concern for food packaging applications. Incorporating nanoclays is an alternative to improve the performance of recycled plastics. However, properties and overall migration from polymer/clay nanocomposites to food require to be evaluated case-by-case. This work aimed to investigate the effect of organic modifier types of clays on the structural, thermal and mechanical properties and the overall migration of nanocomposites based on 50/50 virgin and recycled post-consumer polypropylene blend (VPP/RPP) and organoclays for food packaging applications. The clay with the most hydrophobic organic modifier caused higher thermal stability of the nanocomposites and greater intercalation of polypropylene between clay mineral layers but increased the overall migration to a fatty food simulant. This migration value was higher from the 50/50 VPP/RPP film than from VPP. Nonetheless, clays reduced the migration and even more when the clay had greater hydrophilicity because of lower interactions between the nanocomposite and the fatty simulant. Conversely, nanocomposites and VPP/RPP control films exhibited low migration values in the acid and non-acid food simulants. Regarding tensile parameters, elongation at break values of PP film significantly increased with RPP addition, but the incorporation of organoclays reduced its ductility to values closer to the VPP.

Poly(ε-caprolactone)−Clay Nanocomposites:  Structure and Mechanical Properties

2006 ◽  
Vol 39 (2) ◽  
pp. 747-754 ◽  
Author(s):  
Biqiong Chen ◽  
Julian R. G. Evans
Keyword(s):  
Mechanical Properties ◽  
Clay Nanocomposites

Influence of loading rates on morpholgy and mechanical properties of PLA/clay nanocomposites

2012 ◽  
Vol 7 (5) ◽  
pp. 390
Author(s):  
Mustapha Kaci ◽  
Lynda Zaidi ◽  
Stéphane Bruzaud ◽  
Alain Bourmaud ◽  
Pascal Médéric ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Clay Nanocomposites ◽  
Loading Rates

Counterion Effect on the Morphological and Mechanical Properties of Polymer−Clay Nanocomposites Prepared in an Aqueous Medium

2007 ◽  
Vol 19 (13) ◽  
pp. 3334-3342 ◽  
Author(s):  
Fábio do Carmo Bragança ◽  
Leonardo Fonseca Valadares ◽  
Carlos Alberto de Paula Leite ◽  
Fernando Galembeck
Keyword(s):  
Mechanical Properties ◽  
Aqueous Medium ◽  
Clay Nanocomposites ◽  
Counterion Effect
Sign in / Sign up

Export Citation Format

Share Document