Regulation of crystalline morphologies and mechanical properties of olefin multiblock copolymers by blending polymer with similar architecture of constituent blocks

Zhang, Qinglong; Fan, Jun‐Yu; Feng, Jiachun; Lü, Xiaoying

doi:10.1016/j.polymer.2015.07.034

Cited by 14 publications

(15 citation statements)

References 54 publications

(57 reference statements)

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“…ENGAGE shows three melting peaks at 49, 86, and 128 °C, middle one being the major peak (highest amount of crystallinity). In the blend, HE 73 and HE 37 the T m of HDPE and EPDM are seen at 132, 52 and 131 and 53 °C respectively suggesting almost no considerable interaction between two phases . Interestingly, when 15 wt % ENGAGE is incorporated into the system, Tms with respect to HDPE and EPDM are reduced to 128 and 47 °C, and 127 and 46 °C in HE73EN and HE37 EN, respectively.…”

Section: Resultsmentioning

confidence: 96%

“…That means ENGAGE resides into the interface spreading chains across both the phases through tie molecule formation . When in a given system, components are interactive (compatible and/or miscible) the presence of one component affects the crystallization properties of the other polymer component significantly …”

Section: Resultsmentioning

confidence: 99%

“…In another work adhesion of various olefin copolymers to polypropylene and high‐density polyethylene and their effectiveness as compatibilizers in blends are studied . It is recently reported that olefin copolymer co‐crystallizes with polyolefin of similar chain architectures leading to compatibilize the system . Successful compatibilization of polypropylene/ethylene–propylene–diene terpolymer (PP/EPDM) blends by ethylene‐octene copolymer is also reported by Zhang .…”

Section: Introductionmentioning

confidence: 89%

“…However, nowadays there are many chemically or radiation modified polymeric compatibilizers and copolymers, which are used for the improvement of dispersion and stabilization of the morphology of immiscible polymers. Copolymers among the aforementioned compatibilizers are very attractive . It has been demonstrated experimentally and theoretically that the copolymer chains are located at the interface and act as compatibilizer reducing the interfacial tension …”

Section: Introductionmentioning

confidence: 99%

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ENGAGE compatibilized HDPE/EPDM blends: Modification of some industrially pertinent properties and morphology upon incorporation of Mg(OH)₂ filler and electron beam crosslinked network

Sharma

Chowdhury

Jha

et al. 2017

J of Applied Polymer Sci

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To observe the effect of ENGAGE (a poly‐olefin elastomer) on compatibilization of industrially important incompatible blend, high‐density polyethylene (HDPE)/ethylene‐propylene diene elastomer (EPDM), 15 wt % ENGAGE is incorporated into the system and the latter is found satisfactorily efficient as compatibilizer for the above system. To improve some industrially pertinent properties another strategies are also followed in addition, incorporation of magnesium hydroxide [Mg(OH)2] and electron beam (EB) crosslinking into the system. The gel content was found to increase with radiation dose, EPDM content and Mg(OH)2 dispersion. ENGAGE interestingly increases the gel content that is, promotes crosslinking. It is unique that filler dispersion and crosslinked network formation maintain the compatibility of the ternary system, which is confirmed by X‐ray diffraction, differential scanning calorimetry, mechanical properties, and scanning electron microscope. The compatibilization, Mg(OH)2 dispersion, and EB crosslinking improve the mechanical, thermo mechanical, flame retardant properties, and phase morphology considerably. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44922.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

ENGAGE compatibilized HDPE/EPDM blends: Modification of some industrially pertinent properties and morphology upon incorporation of Mg(OH)₂ filler and electron beam crosslinked network

Sharma

Chowdhury

Jha

et al. 2017

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Block copolymers are promising to solve above problems because of a well‐defined molecular structure . Many studies have shown that the mechanical and rheological properties of various blends are remarkably improved by adopting block copolymers . Similar to anionic polymerization, controlled/living radical polymerization (CLRP) is a powerful tool to synthesize complex polymers like block copolymers and gradient copolymers, especially suitable for polar monomers .…”

Section: Introductionmentioning

confidence: 99%

Morphology and mechanical properties of Acrylonitrile‐styrene‐acrylate toughened plastics with block copolymer chain structure

Huang

Luo

Gao

2018

Polymer Engineering & Sci

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Acrylonitrile‐styrene‐acrylate (ASA) toughened plastics based on block copolymers are successfully prepared via RAFT emulsion polymerization and various molecular structures are designed to have different morphologies in order to investigate the relationship between morphologies and mechanical properties. All materials prepared by blending exhibit sea‐island morphology. Promoting particles dispersion and increasing spherical particle size shorten surface‐to‐surface interparticle distance and help to improve tensile properties of materials. Enlarging particles through crosslinked structures are found to be a more effective method to improve tensile toughness, at the cost of a slight reduction in tensile yield strength. Larger spherical particles with crosslinked structures are found to help improving the Izod notched impact strength of materials. However, the existence of a SAN core decreases the material's ability to withstand impact. Compared to blended samples, triblock copolymer materials display higher flexural strength with equal flexural modulus. POLYM. ENG. SCI., 59:389–395, 2019. © 2018 Society of Plastics Engineers

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Inspection of microwave self‐healing efficiency in carbon nanotube reinforced polymer composites for aerospace applications

Irez

2024

Polymer Composites

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The aerospace industry is evolving very rapidly every day, and due to the low operational and maintenance costs, unmanned aerial vehicles (UAVs) are utilized for many duties, including imaging, patrol, surveillance, and delivery. Flying platforms prioritize effective load‐carrying capacity and light weight. To achieve this, lightweight materials with sufficient strength are utilized, and design optimizations are implemented. This study investigates material development for a UAV propeller, taking into account the possible consequences of a bird strike or hard landing such as micro damage occurrence. In this study, a twin‐screw extruder was used to produce hybrid composites by blending a thermoplastic, polyamide‐6 (PA6) with olefin block copolymers (OBC) and carbon nanotubes (CNT). After manufacturing test specimens by injection molding, tensile and Charpy impact tests were performed. OBC increased the elongation capacity and impact resistance of the PA6 through maleic anhydride (MAH) grafting while reducing the tensile strength. CNT incorporation compensated for this drop, but it rendered the composites more brittle. More importantly, due to the CNT's microwave (MW) absorption capacity, the hybrid composites have gained self‐healing properties. Extended MW exposure time and high MW powers may cause localized burning of the material, resulting in a decrease in its self‐healing efficiency. Following the failure of the examined composites, SEM microscopy revealed various toughening mechanisms in the composites. The use of a modified Halpin‐Tsai model to estimate the elastic characteristics of CNT‐reinforced composites revealed promising results, with minimal discrepancies when compared to experimental data.Highlights CNTs were found efficient for the self‐healing behavior which is critical for improving the lifetime and planning maintenance for UAV propellers. CNT content, MW power & exposure time all impact the self‐healing efficiency. Extended MW exposure time and high MW powers can cause localized burning of the material, resulting in a decrease in its self‐healing efficiency. CNTs created bridge effects, ultimately leading to an enhancement in the strength of the composites. The use of a modified Halpin‐Tsai model yielded good accuracy with experimental data.

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Regulation of crystalline morphologies and mechanical properties of olefin multiblock copolymers by blending polymer with similar architecture of constituent blocks

Cited by 14 publications

References 54 publications

ENGAGE compatibilized HDPE/EPDM blends: Modification of some industrially pertinent properties and morphology upon incorporation of Mg(OH)₂ filler and electron beam crosslinked network

ENGAGE compatibilized HDPE/EPDM blends: Modification of some industrially pertinent properties and morphology upon incorporation of Mg(OH)₂ filler and electron beam crosslinked network

Morphology and mechanical properties of Acrylonitrile‐styrene‐acrylate toughened plastics with block copolymer chain structure

Inspection of microwave self‐healing efficiency in carbon nanotube reinforced polymer composites for aerospace applications

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Regulation of crystalline morphologies and mechanical properties of olefin multiblock copolymers by blending polymer with similar architecture of constituent blocks

Cited by 14 publications

References 54 publications

ENGAGE compatibilized HDPE/EPDM blends: Modification of some industrially pertinent properties and morphology upon incorporation of Mg(OH)2 filler and electron beam crosslinked network

ENGAGE compatibilized HDPE/EPDM blends: Modification of some industrially pertinent properties and morphology upon incorporation of Mg(OH)2 filler and electron beam crosslinked network

Morphology and mechanical properties of Acrylonitrile‐styrene‐acrylate toughened plastics with block copolymer chain structure

Inspection of microwave self‐healing efficiency in carbon nanotube reinforced polymer composites for aerospace applications

Contact Info

Product

Resources

About

ENGAGE compatibilized HDPE/EPDM blends: Modification of some industrially pertinent properties and morphology upon incorporation of Mg(OH)₂ filler and electron beam crosslinked network

ENGAGE compatibilized HDPE/EPDM blends: Modification of some industrially pertinent properties and morphology upon incorporation of Mg(OH)₂ filler and electron beam crosslinked network