Adhesion of propylene–ethylene copolymers to high‐density polyethylene

Yuan, Li-Yan; Poon, B.; Marchand, Gary R.; Hiltner, A.; Baer, E.

doi:10.1002/pen.21492

Cited by 10 publications

(8 citation statements)

References 23 publications

(36 reference statements)

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“…In the thin tie‐layer regime (<2 to 3 μm), G decreased rapidly with decreasing tie‐layer thickness for all the tie‐layers. Two analogous regimes based on the tie‐layer thickness were also observed in PP/HDPE microlayers with elastomeric tie‐layers 18, 19. In these cases, the transition from the thick tie‐layer regime to the thin tie‐layer regime also occurred around 1–2 μm…”

Section: Resultsmentioning

confidence: 60%

Effect of the tie‐layer thickness on the delamination and tensile properties of polypropylene/tie‐layer/nylon 6 multilayers

Khariwala

Ling

Hiltner

et al. 2011

J of Applied Polymer Sci

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This study examined the effect of the tielayer thickness on the delamination behavior of polypropylene/tie-layer/nylon 6 multilayers. Various maleated polypropylene resins were compared for their effectiveness as tie-layers. Delamination failure occurred cohesively in all the multilayer systems. Two adhesion regimes were defined according to the change in the slope of the linear relationship between the delamination toughness and the tie-layer thickness. The measured delamination toughness of the various tie-layers was quantitatively correlated to the length of the damage zone that formed at the crack tip. In addition, the effect of the tie-layer thickness on the multilayer tensile properties was correlated with the delamination behavior. The fracture strain of the multilayers decreased with decreasing tie-layer thickness. An examination of the prefracture damage mechanism of the stretched multilayers revealed a good correlation with the delamination toughness of the tie-layers. In thick tie-layers (>2 lm), the delamination toughness was great enough to prevent the delamination of the multilayers when they were stretched. In thin tie-layers (<2 lm), the delamination toughness of all the tie-layers was low; consequently, delamination led to premature fracture in the stretched multilayers.

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Section: Resultsmentioning

confidence: 60%

Effect of the tie‐layer thickness on the delamination and tensile properties of polypropylene/tie‐layer/nylon 6 multilayers

Khariwala

Ling

Hiltner

et al. 2011

J of Applied Polymer Sci

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“…Increasing T‐peel strength with increasing adhesive (tie layer) thickness, has also been found and is typically attributed to increasing the absolute amount of dissipated energy in the adhesive layer . The latter has also been observed in multilayer systems with repeat units “PP/tie layer/HDPE” as well as “PP/tie layer/Nylon 6” systems, both with elastomeric tie layers. As far as we know, the effect of increasing T‐peel strength with increasing tie layer thickness has never been shown for biaxially drawn multilayer systems.…”

Section: Resultsmentioning

confidence: 81%

“…Kamdar et al investigated the effect of tie layer thickness on the adhesion of ethylene–octene copolymers to polypropylene using multiflux extrusion to generate a multilayered system and found that tie layer thickness improved the adhesion, especially for thin tie layers. Using the same method, the same increase of adhesion with tie‐layer thickness was found for tie layers between polypropylene and polyamide 6 and for tie layers between propylene‐ethylene copolymers and high‐density polyethylene . However, in these studies, neither the effect of processing temperature nor (biaxial) deformation was considered.…”

Section: Introductionmentioning

confidence: 81%

Influence of solid‐state biaxial orientation on the adhesion between poly(ethylene terephthalate)/tie layer/isotactic polypropylene multilayer films

Ghazaryan

Hausmann²,

Tervoort

2020

Journal of Polymer Science

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Current state-of-the-art packaging films typically consist of solid-state stretched multilayer polymer systems, in which each of the polymer layers provides a specific property. Often these polymer film layers are incompatible and need to be glued together by so-called "tie layers." In this article, we apply a novel biaxial orientation technique to examine the effect of solid-state biaxial stretching on the adhesive behavior of a model multilayer system consisting of poly(ethylene terephthalate) and isotactic polypropylene, as an example of two typical incompatible base layers, glued together by a common tie layer. Two main factors affecting the adhesion, the temperature at which the biaxial stretching is performed and the thickness of the tie layer, are discussed in detail.

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“…17 Therefore, the average segment length b was determined to be 4.93 Å . By using the w-value determined by Narasimhan et al 10 from the SAXS data, we were able to calculate the interfacial width.…”

Section: Co-extrusionmentioning

confidence: 99%

Adhesion between polyethylenes and different types of polypropylenes

Song

Bringuier

Kobayashi

et al. 2012

Polym J

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To understand the effect of processing and co-monomer content on interfacial adhesion, we quantified adhesion levels of bilayers of a polyethylene (PE) with various polypropylenes (PPs) prepared using bilayer co-extrusion and lamination processes. We tested adhesion between a medium-density PE (MDPE) with different types of PPs, including impact-modified PP (with various amount of ethylene), isotactic PP and ethylene-propylene random copolymers. Increasing the concentration of ethylene or ethylene-propylene rubber gave rise to increased adhesion. The impact-modified PP with 20 wt% ethylene content exhibited adhesion with MDPE almost two orders of magnitude higher compared with other PPs. Although lamination and co-extrusion processes showed good agreement in these trends with ethylene content, the operation parameters are critical for adhesion control. For lamination, ice-water cooling generated a stronger adhesion than that with air cooling. Faster cooling rates in co-extrusion also gave rise to stronger adhesion. Increasing draw down ratio and varying flow rate to put the interface near the wall resulted in stronger adhesion. Fast quenching rate and increased crystallinity induced by drawing down are believed to be the causes. Both atomic force microscopy and transmission electron microscopic images exhibited roughened interfaces for samples with strong adhesion. Keywords: adhesion; crystallization; extrusion; interface; polyethylene; polypropylene INTRODUCTION Polyethylene (PE) and isotactic polypropylene (iPP) are the first and second highest-volume thermoplastics based on worldwide consumption. 1 The advent of catalysis chemistry, new applications and an expanded user base are projected to fuel the growth of these polyolefins. PE and iPP are low-cost materials providing good mechanical properties for moderate temperature applications.Melt blending is frequently used to extend the property range of polymers. It is also an attractive approach for recycling mixed polymer waste streams. Despite the fact that PP and PE are similar, these two polymers are thermodynamically immiscible. The incompatibility of PP and PE results in blends that have extremely low fracture strain and poor toughness. For instance, when PP and PE blends are cooled from their molten state, each phase 'solidifies by chain-folding into extended crystalline lamellae sandwiched between amorphous regions composed of disorganized looping sections of polymer' . 2 To improve the compatibility of these two polymers, compatibilizers are usually required. To be effective, the

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Adhesion of propylene–ethylene copolymers to high‐density polyethylene

Cited by 10 publications

References 23 publications

Effect of the tie‐layer thickness on the delamination and tensile properties of polypropylene/tie‐layer/nylon 6 multilayers

Effect of the tie‐layer thickness on the delamination and tensile properties of polypropylene/tie‐layer/nylon 6 multilayers

Influence of solid‐state biaxial orientation on the adhesion between poly(ethylene terephthalate)/tie layer/isotactic polypropylene multilayer films

Adhesion between polyethylenes and different types of polypropylenes

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