Morphology, rheological, thermal, and mechanical properties of high-density polyethylene toughened by propylene-ethylene random copolymers

Li, Yang; Li, Dongdong; Cheng, Hongda; Yu, Yancun; Zhang, Ye; Shi, Hechang; Han, Changyu

doi:10.1007/s00396-022-05049-y

Cited by 8 publications

(3 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the addition of EVA, there is minimal change in T m , reaching 86.24°C at 20 wt% EVA content. This minimal change is attributed to the physical separation of POE and EVA due to the low compatibility of EVA, preventing EVA from affecting T m of POE 35 …”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Improved processability for ultra‐high molecular weight polyethylene/polyolefin elastomer composites: Effect of ethylenevinyl acetate copolymer

Park,

Kang,

et al. 2024

Polymer Engineering & Sci

View full text Add to dashboard Cite

Polyolefin elastomer (POE) films can be used as a matrix for ultra‐high molecular weight polyethylene (UHMWPE) fiber‐reinforced composites via a hot‐melt process. However, the low melting temperature of UHMWPE limits composite processing. Therefore, this study aimed to create a film by blending POE with ethylene vinyl acetate (EVA) to reduce the film's processing temperature. Morphological analysis revealed that due to limited compatibility, EVA appeared as droplets within the immiscible POE matrix. T‐Peel tests demonstrated increased self‐adhesion in both the POE/EVA films and the fiber‐reinforced composites with higher EVA content. However, the mechanical properties of POE/EVA films, including tensile properties and shore hardness, were reduced due to EVA having lower inherent properties. UHMWPE fiber‐reinforced composites were fabricated from these films. In composites, optimal tensile and flexural properties were observed at lower EVA content. Scanning electron microscopy analysis suggests that the POE/EVA films are sufficiently infiltrated at 10–20 wt% EVA content. As EVA content increased, the drop weight impact test indicated a reduction in the maximum impact load and an increase in impact energy, attributed to improved adhesion and a broader distribution of impact load across the interface.Highlights Polyolefin elastomer/ultra‐high molecular weight polyethylene composites' properties were studied with varying ethylene vinyl acetate (EVA) additive content. Add EVA to improve film impregnation when forming composites Increase in impregnation affects increase in properties of composites. Characterization shows that the optimal EVA content is 10–20 wt%.

show abstract

Section: Resultsmentioning

confidence: 99%

“…This minimal change is attributed to the physical separation of POE and EVA due to the low compatibility of EVA, preventing EVA from affecting T m of POE. 35 The crystallization temperature (T c ) of the POE/EVA films is presented in Figure 4B. The detailed data is shown in Table 3.…”

Section: Thermal Properties Of Filmsmentioning

confidence: 99%

Improved processability for ultra‐high molecular weight polyethylene/polyolefin elastomer composites: Effect of ethylenevinyl acetate copolymer

Park,

Kang,

et al. 2024

Polymer Engineering & Sci

View full text Add to dashboard Cite

show abstract

“…Polymer blending represents an efficient and cost-effective strategy for enhancing polymer properties. , A substantial body of the literature showcases studies that have implemented thermoplastic elastomers to enhance the toughness of HDPE. ,− However, in many of these attempts, the enhancement has come at the cost of reduced stiffness due to the high concentration of the secondary phase. Recently, a novel generation of polymer composites known as in situ micro/nanofibrillar composites has garnered significant attention for their ability to enhance the mechanical, − rheological, − foaming, − and crystallization − behaviors of polymers.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Mechanical Performance of High-Density Polyethylene at Different Environmental Conditions with Outstanding Foamability through In-Situ Rubber Nanofibrillation: Exploring the Impact of Interface Modification

Kheradmandkeysomi,

Salehi,

Jalali

et al. 2024

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

In this study, we utilized in situ nanofibrillation of thermoplastic polyester ether elastomer (TPEE) within a high-density polyethylene (HDPE) matrix to enhance the rheological properties, foamability, and mechanical characteristics of the HDPE nanocomposite at both room and subzero temperatures. Due to the inherent polarity differences between these two components, TPEE is thermodynamically incompatible with the nonpolar HDPE. To address this compatibility issue, we employed a compatibilizer, styrene/ethylene-butylene/styrene copolymer-grafted maleic anhydride (SEBS-g-MA), to reduce the interfacial tension between the two blend components. In the initial step, we prepared a 10% masterbatch of HDPE/TPEE with and without the compatibilizer using a twin-screw extruder. Subsequently, we processed the 10% masterbatch further through spun bonding to create fiber-in-fiber composites. Scanning electron microscopy (SEM) analysis revealed a significant reduction in the spherical size of HDPE/TPEE particles following the inclusion of SEBS-g-MA, as well as a much smaller TPEE nanofiber size (approximately 60–70 nm for 5% TPEE). Moreover, extensional rheological testing revealed a notable enhancement in extensional rheological properties, with strain-hardening behavior being more pronounced in the compatibilized nanofibrillar composites compared to the noncompatibilized ones. SEM images of the foam structures depicted substantial improvement in the foamability of HDPE in terms of the cell size and density following the nanofibrillation process and the use of the compatibilizer. Ultimately, the in situ rubber fibrillation and enhancement of HDPE and TPEE interface using a compatibilizer led to increasing the HDPE ductility at room and subzero temperatures while maintaining its stiffness.

show abstract

Effects of ethylene‐octene copolymer and ethylene‐propylene copolymer on crystallization, morphology, and foaming properties of ethylene‐vinyl acetate copolymer

Wang,

Hao,

Zou

et al. 2024

Polymer Engineering & Sci

View full text Add to dashboard Cite

Ethylene‐octene copolymer (EOC, three EOCs with different octene content used in this study) and propene‐ethylene copolymer (EPC, three EPCs with different ethylene content used in this study) can have effects on the crystallization dynamics, crystal structure, and foaming properties of ethylene‐vinyl acetate copolymer (EVA). For unfoamed EVA/EOC and unfoamed EVA/EPC blends, both EVA/EOC and EVA/EPC blends show phase separation structure. The foam cells in EVA/EOC blends have better uniformity compared to those in EVA/EPC blends, which result from the better compatibility of EVA and EOC than EVA and EPC obtained from the morphology analysis. For the blends with different crystallization ability of EOC or EPC, the blends with lower crystallinity has more uniform cell distribution than blends with higher crystallinity, due to the crystallization zone cause heterogeneous crosslinking and foaming of the blend. Both EOC and EPC can impart higher elasticity to EVA foamed materials. EOC was found to be more suitable for blending with EVA for foamed materials, offering the potential to obtain EVA/EOC foamed materials with excellent performance.Highlights Ethylene‐octene copolymer with higher octene content has better effect on foaming property of ethylene‐vinyl acetate copolymer than ethylene‐propylene copolymer. Ethylene‐propylene copolymer can decrease the foaming temperature of ethylene‐vinyl acetate copolymer. A mechanism of foaming for ethylene‐vinyl acetate copolymer/semi‐crystallized polymer blends is proposed. Achieved in‐depth understanding of structure–property relationship about ethylene‐vinyl Acetate copolymer/polyolefin elastomer foamed material.

show abstract

Morphology, rheological, thermal, and mechanical properties of high-density polyethylene toughened by propylene-ethylene random copolymers

Cited by 8 publications

References 34 publications

Improved processability for ultra‐high molecular weight polyethylene/polyolefin elastomer composites: Effect of ethylenevinyl acetate copolymer

Improved processability for ultra‐high molecular weight polyethylene/polyolefin elastomer composites: Effect of ethylenevinyl acetate copolymer

Enhancing Mechanical Performance of High-Density Polyethylene at Different Environmental Conditions with Outstanding Foamability through In-Situ Rubber Nanofibrillation: Exploring the Impact of Interface Modification

Effects of ethylene‐octene copolymer and ethylene‐propylene copolymer on crystallization, morphology, and foaming properties of ethylene‐vinyl acetate copolymer

Contact Info

Product

Resources

About