Heptene-functionalized graphitic nanoplatelets for high-performance composites of linear low-density polyethylene

2020 ◽  
Vol 199 ◽  
pp. 108380 ◽  
Author(s):  
Ha Dong Song ◽  
Yoon-Kwang Im ◽  
Jong-Beom Baek ◽  
In-Yup Jeon
Keyword(s):  
High Performance ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene

High performance linear low density polyethylene nanocomposites reinforced by two-dimensional layered nanomaterials

Polymer ◽  
2019 ◽  
Vol 172 ◽  
pp. 142-151 ◽  
Author(s):  
Tao Li ◽  
Haoyang Sun ◽  
Fan Lei ◽  
Dandan Li ◽  
Jing Leng ◽  
...  
Keyword(s):  
High Performance ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Two Dimensional ◽  
Linear Low Density Polyethylene

Study on the Crystallinity and Mechanical Properties of PC/PLA/LLDPE/ Montmorillonite Blends

2013 ◽  
Vol 739 ◽  
pp. 38-41
Author(s):  
Yi Chen ◽  
Yue Peng ◽  
Wen Yong Liu ◽  
Guang Sheng Zeng ◽  
Xiang Gang Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Impact Strength ◽  
High Performance ◽  
Impact Resistance ◽  
Low Density Polyethylene ◽  
Poly Lactic Acid ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Elongation At Break

Polycarbonate/poly (lactic acid)/(PC/PLA) blend is a kind of novel potential material for introducing the degradability of PLA to high performance PC. However, the bad compatibility between PC and PLA results in poor impact resistance and strength, which limits its applications. For resolving the problem, linear low density polyethylene (LLDPE) was added into blend to improve the mechanical properties, especially the toughness. Meantime, nanosized montmorillonite was also used as an additive for modifying the blend. The results showed that the the tensile and impact strength, the elongation at break of PC/PLA all be improved with the increase of LLDPE, the nanosized montmorillonite could also increase the strength of blends when the content is lower than wt5% of blends.

scholarly journals Microstructural Origin of the Double Yield Points of the Metallocene Linear Low-Density Polyethylene (mLLDPE) Precursor Film under Uniaxial Tensile Deformation

Polymers ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 126
Author(s):  
Obaid Iqbal ◽  
Jean Claude Habumugisha ◽  
Shengyao Feng ◽  
Yuanfei Lin ◽  
Wei Chen ◽  
...  
Keyword(s):  
Yield Point ◽  
High Performance ◽  
Monoclinic Phase ◽  
Tensile Deformation ◽  
Low Density Polyethylene ◽  
Uniaxial Tensile ◽  
Precursor Film ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Double Yield

The microstructural origin of the double yield points of metallocene linear low-density polyethylene (mLLDPE) precursor films has been studied with the assistance of the synchrotron radiation small- and wide-angle X-ray scattering (SAXS/WAXS). It has been shown that the microstructural origin of the double yield points is highly related to the initial orientation of the original precursor film. For less oriented mLLDPE precursor films, the rearrangement of lamellae and the appearance of the monoclinic phase are the microstructural origins of the first yield point. In comparison, for the highly-oriented mLLDPE precursor film, only the orthorhombic-monoclinic phase transition appears at the first yield point. The melting-recrystallization and the formation of the fibrillary structure happen beyond the second yield point for all studied mLLDPE precursor films. Finally, the detailed microstructural evolution roadmaps of mLLDPE precursor films under uniaxial tensile deformation have been established, which might serve as a guide for processing high-performance polymer films by post-stretching.

scholarly journals Identification of the LLDPE Constitutive Material Model for Energy Absorption in Impact Applications

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1537
Author(s):  
Luděk Hynčík ◽  
Petra Kochová ◽  
Jan Špička ◽  
Tomasz Bońkowski ◽  
Robert Cimrman ◽  
...  
Keyword(s):  
Strain Rate ◽  
Material Model ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Stress Strain ◽  
Rate Dependent ◽  
Constitutive Material Model ◽  
Principal Directions ◽  
Constitutive Material

Current industrial trends bring new challenges in energy absorbing systems. Polymer materials as the traditional packaging materials seem to be promising due to their low weight, structure, and production price. Based on the review, the linear low-density polyethylene (LLDPE) material was identified as the most promising material for absorbing impact energy. The current paper addresses the identification of the material parameters and the development of a constitutive material model to be used in future designs by virtual prototyping. The paper deals with the experimental measurement of the stress-strain relations of linear low-density polyethylene under static and dynamic loading. The quasi-static measurement was realized in two perpendicular principal directions and was supplemented by a test measurement in the 45° direction, i.e., exactly between the principal directions. The quasi-static stress-strain curves were analyzed as an initial step for dynamic strain rate-dependent material behavior. The dynamic response was tested in a drop tower using a spherical impactor hitting a flat material multi-layered specimen at two different energy levels. The strain rate-dependent material model was identified by optimizing the static material response obtained in the dynamic experiments. The material model was validated by the virtual reconstruction of the experiments and by comparing the numerical results to the experimental ones.

Physical and mechanical properties of linear low-density polyethylene/cycloolefin copolymer/layered silicate nanocomposite

2015 ◽  
Vol 37 (11) ◽  
pp. 3167-3174 ◽  
Author(s):  
S. Sánchez-Valdes ◽  
E. Ramírez-Vargas ◽  
L.F. Ramos de Valle ◽  
J.G. Martinez-Colunga ◽  
J. Romero-Garcia ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Layered Silicate ◽  
Physical And Mechanical Properties ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene
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