Effects of liquid crystal polymer and organoclay addition on the physical properties of high‐density polyethylene films

Durmuş, Ali; Ercan, Nevra; Alanalp, Mine Begum; Gökkurt, Tolga; Aydın, İsmail

doi:10.1002/pen.25117

Cited by 3 publications

(2 citation statements)

References 43 publications

(47 reference statements)

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“…The test specimens of transmission loss measurements with a 30 mm radius and a thickness of 10 mm ( Figure 1 ) were cut via a computer numerical control (CNC) machine. To guarantee proper dispersion and distribution, and to prevent agglomeration, a screw design was chosen with a configuration that enabled intense shear and high residence time, arranged with kneaded convey blocks and the design of the selected screw configuration [ 24 ].…”

Section: Methodsmentioning

confidence: 99%

An Industrial Case for Polypropylene Nanocomposite Foams: Lightweight, Soundproof Exterior Automotive Parts

Ozunlu

Güner

2022

Polymers

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Lightweighting is a challenge for the automotive industry, and foaming is a key technology used to address this problem. A new practical approach is studied to regulate the cell formation of copolymer polypropylene (co-PP) by utilizing graphene nanoplatelets (xGnP) as a process aid during foam injection molding. The approach was designed to enable process freedom to tune part performance by adjusting the amount of xGnP masterbatch. Two different levels of 1–2 wt % xGnP and 0.25–0.35 wt % supercritical fluid (SCF) were investigated. Prepared samples were compared with samples prepared by the traditional method (twin-screw extrusion followed by foam injection molding). The nanocomposite with 2 wt % xGnP comparatively showed about twofold reduction in cell size magnitude. Although the increment in SCF amount resulted in a 47% and 122% enhancement in flexural modulus and strength, respectively, and a 45% loss in Izod unnotched impact strength, the cell size was prone to increasing with regard to low melt strength as compared to neat foams. In conclusion, a 12% weight reduction fulfilled the desired performance parameters in terms of mechanical and sound insulation by utilizing 2 wt % xGnP as a process aid.

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Section: Methodsmentioning

confidence: 99%

An Industrial Case for Polypropylene Nanocomposite Foams: Lightweight, Soundproof Exterior Automotive Parts

Ozunlu

Güner

2022

Polymers

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“…Öte yandan, yüksek yoğunluklu polietilen diğer polietilen sınıflarına göre nispeten yüksek ergime sıcaklığı ve daha dengeli mekanik özellikleri sebebiyle, ısıl ve mekanik mühendislik uygulamalarında sıklıkla tercih edilmektedir [13,14]. Yüksek süneklik, yüksek tokluk, üstün kimyasal ve çevresel dayanıklılık özellikleri bu malzemelerin otomotiv parçalarından boru hatlarına, paketlemeden denizcilik sektöründe kullanımına kadar geniş ve yaygın uygulama alanlarının önünü açmıştır [15][16][17][18].…”

Section: Introductionunclassified

Sıcak Plaka Kaynak Yöntemi ile Birleştirilmiş Benzer ve Benzer Olmayan Alçak Yoğunluklu Polietilen (AYPE) Bağlantıların Mekanik Özelliklerinin Karşılaştırmalı Olarak Araştırılması

Öztoprak¹

2020

Deu Muhendislik Fakultesi Fen Ve Muhendislik

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Industrial demands of utilizing polymers and therefore, the search for more reliable joining techniques is gradually increasing. The use of Hot Plate Welding (HPW), which is one of the simplest and most economical methods of joining thermoplastics, is known to manufacture strong joints. This study reveals that it is possible to join LDPE and HDPE snugly using HPW method with appropriate parameters. In the research, similar and dissimilar polyethylene classes are joined with each other and mechanical properties of the joints are examined in terms of the tensile strength and impact behaviors. Obtained results are compared considering the base materials themselves and between

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Investigation of physical, thermal, mechanical and gas permeability properties of low‐density polyethylene/ poly(4‐methyl‐1‐pentene) blend films and their utilization for fresh‐cut fruit and vegetable packaging applications

Gokkurt,

Gokkurt

2024

Polymer Engineering & Sci

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In this study, low density polyethylene/poly(4‐methyl‐1‐pentene) (LDPE/PMP) blend films were prepared by melt compounding in a twin‐screw extruder then film casting in a single screw extruder equipped with a cast‐film. Morphological, thermal, and mechanical properties of flexible blend films were characterized by XRD, SEM, DSC analysis, and tensile tests. Solid‐state viscoelastic properties of samples were also quantified by measuring creep behaviors in DMA. Oxygen and carbon dioxide permeability values of films were measured. Their packaging film application performances were evaluated by observing the textural properties of fresh‐cut bananas stored into LDPE and a blend film bag and monitoring the ethylene, oxygen, carbon dioxide concentrations into the bags for 14 days. It was found that LDPE/PMP blends showed partially miscible structure but yielded highly transparent films. DSC results pointed out that the PMP significantly reduced the degree of crystallinity value of LDPE. On the other hand, PMP improved tensile strength and elastic modulus of LDPE. Creep tests indicated that the PMP addition significantly reduced the creep resistance and relaxation time of LDPE. This study clearly signified that the PMP dramatically increased the oxygen permeability value of LDPE. It has also been concluded that LDPE/PMP blend films can be used as a highly permeable packaging material for successfully extending the shelf life of fresh‐cut fruits and vegetables.Highlights LDPE/PMP films, despite being partially miscible, are highly transparent and made through melt compounding and film casting. Adding PMP to LDPE reduces crystallinity but improves tensile strength and elasticity, as shown by DSC tests. PMP reduces LDPE's creep resistance and quickens relaxation time, according to DMA creep tests. PMP greatly increases LDPE's oxygen permeability, ideal for gas‐transmitting packaging. LDPE/PMP film packaging prolongs the shelf life of fresh produce, proven in a banana storage study.

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Effects of liquid crystal polymer and organoclay addition on the physical properties of high‐density polyethylene films

Cited by 3 publications

References 43 publications

An Industrial Case for Polypropylene Nanocomposite Foams: Lightweight, Soundproof Exterior Automotive Parts

An Industrial Case for Polypropylene Nanocomposite Foams: Lightweight, Soundproof Exterior Automotive Parts

Sıcak Plaka Kaynak Yöntemi ile Birleştirilmiş Benzer ve Benzer Olmayan Alçak Yoğunluklu Polietilen (AYPE) Bağlantıların Mekanik Özelliklerinin Karşılaştırmalı Olarak Araştırılması

Investigation of physical, thermal, mechanical and gas permeability properties of low‐density polyethylene/ poly(4‐methyl‐1‐pentene) blend films and their utilization for fresh‐cut fruit and vegetable packaging applications

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