Polymerization compounding of hemp fibers to improve the mechanical properties of linear medium density polyethylene composites

2017 ◽  
Vol 39 (8) ◽  
pp. 2860-2870 ◽  
Author(s):  
Désiré Yomeni Chimeni ◽  
Charles Dubois ◽  
Denis Rodrigue
Keyword(s):  
Mechanical Properties ◽  
Medium Density ◽  
Hemp Fibers ◽  
Linear Medium ◽  
Polyethylene Composites

Optimisation of material compositions for flammability characteristics in rice husk/polyethylene composites

2014 ◽  
Vol 33 (22) ◽  
pp. 2021-2033 ◽  
Author(s):  
Ahmad Bilal ◽  
Richard JT Lin ◽  
Krishnan Jayaraman
Keyword(s):  
Rice Husk ◽  
Mass Loss Rate ◽  
Fire Retardant ◽  
Medium Density ◽  
Fire Retardancy ◽  
Cone Calorimetry ◽  
Linear Medium ◽  
Flammability Characteristics ◽  
Contour Plots ◽  
Polyethylene Composites

A parametric study on the flammability characteristics of rice husk-reinforced polyethylene composites with various material compositions was conducted to find the “best” composites’ formulation for fire retardancy. Composites were manufactured using rice husk, maleated anhydride polyethylene and linear medium density polyethylene. The blends for manufacturing of composites were selected using mixture design approach. The individual effects of each constituent material on the fire performance of composites by cone calorimeter were studied using trace and contour plots for the various thermal and flammability properties. Regression coefficients were also estimated for each measured response. The cone calorimetry results show that the addition of rice husk improved fire retardancy of composites. The addition of maleated anhydride polyethylene did not influence the flammability properties much, except for mass loss rate and specific extinction area. The optimum mixture of rice husk, maleated anhydride polyethylene and linear medium density polyethylene for overall “best” flammability properties of the composites was also determined by multiple response optimisation using the regression models in Design Expert software. The optimum mixture for overall “best” fire retardant properties was found to be 50 wt% of rice husk, 5.6 wt% of maleated anhydride polyethylene and 44.4 wt% of linear medium density polyethylene. The flammability properties measured from composites manufactured with this formulation closely matched the values predicted by the model.

Rheological behavior of composites made from linear medium-density polyethylene and hemp fibers treated by surface-initiated catalytic polymerization

2018 ◽  
Vol 57 (6-7) ◽  
pp. 445-457 ◽  
Author(s):  
Désiré Yomeni Chimeni ◽  
Valerian Hirschberg ◽  
Charles Dubois ◽  
Denis Rodrigue
Keyword(s):  
Rheological Behavior ◽  
Medium Density ◽  
Catalytic Polymerization ◽  
Hemp Fibers ◽  
Linear Medium

scholarly journals The Structure and Mechanical Properties of Hemp Fibers-Reinforced Poly(ε-Caprolactone) Composites Modified by Electron Beam Irradiation

2021 ◽  
Vol 11 (12) ◽  
pp. 5317
Author(s):  
Rafał Malinowski ◽  
Aneta Raszkowska-Kaczor ◽  
Krzysztof Moraczewski ◽  
Wojciech Głuszewski ◽  
Volodymyr Krasinskyi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Electron Beam ◽  
Impact Strength ◽  
Flexural Modulus ◽  
Natural Fibers ◽  
High Energy ◽  
Electron Radiation ◽  
Elongation At Break ◽  
Hemp Fibers

The need for the development of new biodegradable materials and modification of the properties the current ones possess has essentially increased in recent years. The aim of this study was the comparison of changes occurring in poly(ε-caprolactone) (PCL) due to its modification by high-energy electron beam derived from a linear electron accelerator, as well as the addition of natural fibers in the form of cut hemp fibers. Changes to the fibers structure in the obtained composites and the geometrical surface structure of sample fractures with the use of scanning electron microscopy were investigated. Moreover, the mechanical properties were examined, including tensile strength, elongation at break, flexural modulus and impact strength of the modified PCL. It was found that PCL, modified with hemp fibers and/or electron radiation, exhibited enhanced flexural modulus but the elongation at break and impact strength decreased. Depending on the electron radiation dose and the hemp fibers content, tensile strength decreased or increased. It was also found that hemp fibers caused greater changes to the mechanical properties of PCL than electron radiation. The prepared composites exhibited uniform distribution of the dispersed phase in the polymer matrix and adequate adhesion at the interface between the two components.

Behavior of polyethylene composites based on hemp fibers treated by surface‐initiated catalytic polymerization

2021 ◽  
Author(s):  
Désiré Chimeni‐Yomeni ◽  
Adrien Faye ◽  
Denis Rodrigue ◽  
Charles Dubois
Keyword(s):  
Catalytic Polymerization ◽  
Hemp Fibers ◽  
Polyethylene Composites

Apatite-Forming Ability and Mechanical Properties of Glass-Ceramic A-W-Polyethylene Composites

2001 ◽  
Vol 218-220 ◽  
pp. 437-440 ◽  
Author(s):  
J.A. Juhász ◽  
Kawashita Masakazu ◽  
Noboru Miyata ◽  
Tadashi Kokubo ◽  
Takashi Nakamura ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Glass Ceramic ◽  
Polyethylene Composites

MECHANICAL PROPERTIES OF ROTATIONALLY MOLDED PET MICROFIBRIL REINFORCED COMPOSITES

2006 ◽  
Vol 20 (25n27) ◽  
pp. 4613-4618 ◽  
Author(s):  
R. J. T. LIN ◽  
D. BHATTACHARYYA ◽  
S. FAKIROV
Keyword(s):  
Mechanical Properties ◽  
Manufacturing Industry ◽  
Polymer Processing ◽  
Raw Material ◽  
Medium Density ◽  
Reinforced Composites ◽  
Rotational Molding ◽  
Commercial Scale ◽  
Strength And Stiffness ◽  
Set Up

Being a fast growing plastic manufacturing industry, rotational molding has been using the linear polyethylenes extensively as the raw material. As these materials have shown insufficient mechanical properties for certain applications where strength and stiffness of the products are the main concerns, worldwide rotational molders have expressed a need for stronger and stiffer materials to be available for rotomolding. A possible attractive solution may be the recently developed microfibril reinforced composites (MFCs). Blends of linear medium density polyethylene/polyethylene terephthalate (LMDPE/PET) with an MFC structure are manufactured on a commercial-scale set-up and thereafter used in rotational molding. The samples are characterized morphologically and tested mechanically. The results obtained show that the MFC-concept has good application opportunities in the polymer processing including rotational molding.

Effect of Reinforcement Shape and Fiber Treatment on the Mechanical Properties of Oil Palm Empty Fruit Bunch-Polyethylene Composites

2010 ◽  
Author(s):  
M. F. Arif ◽  
P. S. M. M. Yusoff ◽  
K. K. Eng ◽  
Mohamad Rusop ◽  
Rihanum Yahaya Subban ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Oil Palm ◽  
Empty Fruit Bunch ◽  
Fiber Treatment ◽  
Polyethylene Composites
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