Thermal, mechanical, and adhesive properties of HDPE/reactive ethylene terpolymer blends

Abstract

Blends of high-density polyethylene (HDPE) and a reactive ethylene terpolymer (RET) were developed as a protective coating material for steel. A morphological study with scanning electron microscopy (SEM) indicated that blends of HDPE and RET are immiscible, while high interaction between these two phases was found. Crystallization and thermomechanical behavior of the blends were investigated using differential scanning calorimetry (DSC) and dynamic mechanical thermal analysis (DMTA). The crystallinity of HDPE decreased with the incorporation of RET slightly due to the disturbance of the highly viscous RET melt during crystallization. Tensile tests indicated that the addition of RET reduced both strength and modulus but increased the strain-to-break. Adhesion to steel substrates was improved with the incorporation of the RET component. An optimum composition of RET loading was detected to be in the range of 25-33 wt %, leading to the best adhesive performance, high tensile strength, and strain-to-failure of the blend material.

Filled reactive ethylene terpolymer primers for cathodic disbondment mitigation

“…Platelets sizes of approximately 20–24 μm were selected for the clay and talc materials, whereas the zinc fillers consisted of a random distribution of spherical particles between 2 and 10 μm in diameter. A broad melt temperature range was observed for the pure RET, spanning from 29.5 to 87.0°C, as characterized previously 25. The elastomeric n ‐butyl acrylate component of the terpolymer contributed to an elongation at break value of 526%.…”

Strong synergistic improvement of mechanical properties in HDPE/COC blends with fibrillar morphology

“…) from 89°C (pure COC) to 80°C (HDPE/COC blend). Such shifts prove the interaction between the two phases, which indicates their good compatibility or even partial miscibility . For our HDPE/COC blend, the lower‐ T g majority component (HDPE) probably partially penetrated to the higher‐ T g particles and somewhat increased the mobility of the polymer chains at the interface.…”

Influence of MA‐g‐HDPE compatibilizer content on quality and adhesion/bending strength of polyethylene/O‐MMT coating films

“…5,6 Polyolefins are among the common materials used for coating processes. 7,8 Polyethylene is probably the most widely protective coating for steel substrates due to its excellent mechanical and thermal properties, barrier against moisture, chemical and biological resistance, convenient process ability, and low cost. 9 However, low surface energy, non-polar character, and the lack of reactive sites significantly limit its use in applications requiring good surface/interface properties.…”

“…Polyolefins are among the common materials used for coating processes . Polyethylene is probably the most widely protective coating for steel substrates due to its excellent mechanical and thermal properties, barrier against moisture, chemical and biological resistance, convenient process ability, and low cost .…”