Investigation of rheological behaviors of polyolefin blend type thermoplastic elastomers for quantifying microstructure-property relationships

Durmuş, Ali; Alanalp, Mine Begum; Aydın, İsmail

doi:10.1007/s13367-019-0011-8

Cited by 7 publications

(8 citation statements)

References 43 publications

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“…At a higher shear rate, the PP matrix re‐arrange aggregate structure is hence aggregated copolymer particles are possibly dilapidated and interactions at the interface would be eliminated. The resultant free space between dispersed components, which both contributes to the drop in viscosity 62 . Moreover, the storage modulus values of the blends were between those of pure PP and copolymers at the investigated frequency range.…”

Section: Resultsmentioning

confidence: 89%

Effects of different polyolefin copolymers on properties of melt mixed polypropylene blends

Doan

Müller

Nguyen

2022

J of Applied Polymer Sci

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Polypropylene (PP) is an affordable plastic commodity but lacks massive use in engineering applications given its limited mechanical properties including significantly low impact strength. In this work, three polyolefin-based copolymers including ethylene-octene random block (Engage, E), ethylene-octene multiblock (Infuse, I), and ethylene-propylene copolymer (Versify, V) were blended with PP. It was found that the V copolymer was miscible while the rests were immiscible in the PP matrix. Mechanical testings indicated that the addition of the 20% E and 20% I copolymers significantly enhanced the impact toughness of PP up to 83% and 108% at À20 C, respectively. At a higher temperature such as 25 C, the impact toughness of the PP/E20 and PP/I20 were 400 and 571%, respectively. The enhancement of the PP impact toughness was governed by the particle size of the added immiscible copolymers. Experimental results also revealed that the good compatibility between PP and copolymers has an insignificant influence on the mechanical properties of PP while the essence of added copolymer plays a key role instead. The findings from this work provide significant insights into the design of PP-based products with desirable properties to satisfy requirements demanded by engineering applications.

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Section: Resultsmentioning

confidence: 89%

Effects of different polyolefin copolymers on properties of melt mixed polypropylene blends

Doan

Müller

Nguyen

2022

J of Applied Polymer Sci

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“…The storage moduli of the blends took place between pure polymers at high frequencies (Figure 6B). At low frequency range neat SIS and the blends, except the 70PEO/30SIS, exhibited plateau in the modulus, which was probably caused by restriction effect of hard polystyrene domains for soft PI segment in the SIS block copolymer 34 . The modulus of the 70PEO/30SIS blend in which contains the PEO matrix and the SIS droplets, followed a typical thermoplastic polymer curve and the modulus increased with increasing frequency.…”

Section: Resultsmentioning

confidence: 91%

“…At low frequency range neat SIS and the blends, except the 70PEO/30SIS, exhibited plateau in the modulus, which was probably caused by restriction effect of hard polystyrene domains for soft PI segment in the SIS block copolymer. 34 The modulus of the 70PEO/30SIS blend in which contains the PEO matrix and the SIS droplets, followed a typical thermoplastic polymer curve and the modulus increased with increasing frequency. The 60PEO/40SIS blend, which has co-continuous morphology interestingly acted as more likely PEO at high frequencies and more likely SIS at lower frequencies.…”

Section: Rheological Propertiesmentioning

confidence: 94%

Thermo‐responsive shape memory behavior of poly(styrene‐b‐isoprene‐b‐styrene)/ethylene‐1‐octene copolymer thermoplastic elastomer blends

Tekay

2020

Polymers for Advanced Techs

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Thermally-triggered shape memory polymers (SMPs) are smart materials, which are capable of changing their shapes when they are exposed a heat stimulant. Blending semi-crystalline and elastomeric polymers is an easy and low-cost way to obtain thermo-responsive SMPs. In this work, novel poly(ethylene-co-1-octene) (PEO) and poly(styrene-b-isoprene-b-styrene) (SIS) thermoplastic elastomer blends were prepared via melt blending method. The morphological, mechanical, rheological properties and shape memory behaviours of the blends were investigated in detail. In morphological analysis, co-continuous morphology was found for 50 wt% PEO/50 wt% SIS and 60 wt% PEO/40 wt% SIS (60PEO/40SIS) blends. The shape memory analysis per

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“…Bu durum, COPE polimerinin karboksilik asit uç gruplarında bulunan hidroksil grupları (3450-3750 cm -1 aralığında görülen geniş pik) [24] ile EVA'nın ester oksijeni arasında hidrojen bağı kurması veya COPE üzerindeki polar gruplarla gerçekleştirdiği dipoldipol etkileşimlerinden kaynaklanmış olabilir. [32]. Bunula birlikte, harmanların düşük frekans bölgesindeki modül değerlerinin kayma hassaslığı, saf COPE'ye kıyasla daha düşük bulunmuştur.…”

Section: Ftir Analizi (Ftir Analysis)unclassified

Preparation of thermo-responsive shape memory copolyester thermoplastic elastomer (COPE) and poly(ethylene-co-vinyl acetate) polymer blends

Tekay

2020

Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi

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 Preparation of COPE/EVA blend through melt mixing  Determination of shape memory properties  Effect of composition on morphologyShape memory polymers (SHP) are smart materials that can change their shape when stimulated with an external stimulus such as heat, humidity, magnetic field and electric field. Thermo-responsive shape memory polymers have the ability to change their temporary shape with their permanent shape when they are exposed to an external heat stimuli and this ability gives them great potential for sensor, actuator, medical and packaging applications. Thermally sensitive shape memory polymers need at least two functional components. One of them is the switch component and it is responsible for fixing the temporary shape. The other component is the elastomeric component and it provides required driving force to recover the permanent shape. In this study, thermo-responsive shape memory copolyester thermoplastic elastomer (COPE) and poly (ethylene-co-vinyl acetate) (EVA) polymer blends were prepared and their shape memory characteristics were investigated. Figure A.Thermo-mechanical graph of the 50C-50E blend and photographs of shape memory behavior.Purpose: The aim of this study is preparation of novel thermally responsive shape memory COPE/EVA polymers blends and report their characteristics.Theory and Methods: COPE/EVA polymer blends were prepared through melt mixing of switch component EVA and elastic component COPE. Morphological, thermal, mechanical and shape memory properties of the prepared blends were investigated. Results:Scanning Electron microscopy (SEM) analysis showed that the polymer blend containing 50 wt% COPE and 50 wt% EVA showed co-continuous morphology, while other compositions were found to exhibit droplet morphologies. Among the blends, the 30C-70E exhibited 94.88% shape fixing ratio and 89.20% shape recovery ratio. On the other hand, 50C-50E blend with relatively higher deformability, showed the optimum shape fixing and recovery ratios.The shape memory analysis of the 50C-50E polymer blend in hot water showed that after the material was deformed and cooled, it retained its temporary shape, and when it was reheated, it quickly returned to its permanent shape. Conclusion:Novel thermally responsive shape memory COPE/EVA polymer blends were produced via melt mixing method. According to the thermo-responsive shape memory property analyses, the shape fixing (Rf) and shape recovery (Rr) ratios were increased when the amount of EVA increase in the polymer blend.

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Investigation of rheological behaviors of polyolefin blend type thermoplastic elastomers for quantifying microstructure-property relationships

Cited by 7 publications

References 43 publications

Effects of different polyolefin copolymers on properties of melt mixed polypropylene blends

Effects of different polyolefin copolymers on properties of melt mixed polypropylene blends

Thermo‐responsive shape memory behavior of poly(styrene‐b‐isoprene‐b‐styrene)/ethylene‐1‐octene copolymer thermoplastic elastomer blends

Preparation of thermo-responsive shape memory copolyester thermoplastic elastomer (COPE) and poly(ethylene-co-vinyl acetate) polymer blends

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