KİL/LLDPE VE ORGANİK KİL/LLDPE NANOKOMPOZİTELERİNİN MEKANİK ÖZELLİKLERİ

Öz

Lineer düşük yoğunluklu polietilen (LLDPE), hem hafif hem de esnek olması nedeniyle günlük yaşamda birçok alanda yaygın olarak kullanılmaktadır. Bu çalışmada, polimerin mekanik özelliklerini iyileştirmek amacıyla pozitif yüklü tuz ile modifiye edilmiş organokil ve nano boyutlu kilin düşük miktarlarının (ağ. %1-5) kullanıldığı eriyik interkalasyon yöntemi ile kil/LLDPE ve organokil/LLDPE nanokompozitleri elde edilmiştir. Karakterizasyon ve mekanik testler, katkı miktarının artışıyla kompozitlerin mekanik dayanımının arttığını ancak esnekliklerinin kısmen azaldığını göstermiştir. FTIR ve XRD analizleri, kil ve organokilin polimer zincirleriyle etkileşime girerek homojen bir şekilde dağıldığını doğrulamıştır. ANOVA sonuçları, dolgu tipi ve konsantrasyonunun mekanik özellikler üzerinde önemli bir etkiye sahip olduğunu ve organofilik organokilin, hidrofilik kile kıyasla LLDPE matrisi ile daha üstün bir etkileşme gösterdiğini ortaya koymuştur. Özellikle, %5 ağırlık oranında organokil ilavesi ile elastik modülde %56,67, akma dayanımında %58,73 ve çekme dayanımında %39,53 oranında artış gözlenmiştir. Ayrıca, erime sıcaklığındaki %5’lik artış, bu nanokompozitlerin sıcaklık değişimlerine karşı dayanıklılık gerektiren uygulama alanlarında kullanım potansiyelini artırabileceğini göstermektedir.

Anahtar Kelimeler

• Kil
• LLDPE
• Mekanik özellikler
• Nanokompozit
• Organokil

Destekleyen Kurum

Khalifa University (formerly known as The Petroleum Institute), UAE

Proje Numarası

RAGS-09045

Etik Beyan

Bu çalışmada araştırma ve yayın etiği gözetilmiştir.

MECHANICAL PROPERTIES OF CLAY/LLDPE AND ORGANOCLAY/LLDPE NANOCOMPOSITES

Öz

Linear low-density polyethylene (LLDPE) is widely used in many areas in daily life because it is both light and flexible. In this study, clay/LLDPE and organoclay/LLDPE nanocomposites were obtained by melt intercalation method, incorporating small amounts (1- 5 wt.%) of nanosized clay and organoclay modified with a positively charged salt to enhance the mechanical properties of the polymer. Characterization and mechanical tests showed that the mechanical strength of the composites increased with additive content, though some flexibility was partially lost. FTIR and XRD analyses confirmed that clay and organoclay interacted with polymer chains and dispersed homogeneously. ANOVA results demonstrated that both filler type and concentration significantly influence the mechanical properties, with organophilic organoclay showing superior interaction to the LLDPE matrix compared to hydrophilic clay. Specifically, the addition of 5 wt.% organoclay resulted in increases of 56,67%, 58,73%, and 39,53% in elastic modulus, yield strength, and tensile strength, respectively. Additionally, the observed 5% rise in melting temperature suggests potential for expanding the application range of these nanocomposites to areas requiring thermal stability.

Anahtar Kelimeler

• Clay
• LLDPE
• mechanical properties
• nanocomposite
• organoclay

Destekleyen Kurum

Khalifa Üniversitesi (eski adıyla Petrol Enstitüsü), BAE

Proje Numarası

RAGS-09045

Etik Beyan

Research and publication ethics were observed in this study.

Kaynakça

1. As'Habi, L., Jafari, S. H., Khonakdar, H. A., Kretzschmar, B., Wagenknecht, U., & Heinrich, G. (2013). Effect of clay type and polymer matrix on microstructure and tensile properties of PLA/LLDPE/clay nanocomposites. Journal of Applied Polymer Science, 130(2), 749–758.
2. Canbaz, E. G., & Güngör, N. (2009). Kil/Kitosan ve Organokil/Kitosan nanokompozitlerinin üretimi ve karakterizasyonu [Production and characterization of Clay/Chitosan and Organoclay/Chitosan nanocomposites]. ITU Journal Series C: Basic Sciences, 7(1), 45–53.
3. Durmus, A., Kasgoz, A., & Macosko, C. W. (2007). Linear low-density polyethylene (LLDPE)/clay nanocomposites. Part I: Structural characterization and quantifying clay dispersion by melt rheology. Polymer, 48(15), 4492–4502.
4. Gulmine, J.V., Janissek, P.R., Heise, H.M., Akcelrud, L., (2002). Polyethylene characterization by FTIR, Polymer Testing, 21(5), 557-563.
5. Gunister, E., Alemdar, S. A., & Güngör, N. (2004). Effect of sodium dodecyl sulfate on flow and electrokinetic properties of Na-activated bentonite dispersions. Bulletin of Materials Science, 27, 317–322.
6. Hotta, S., & Paul, D. R. (2004). Nanocomposites formed from linear low-density polyethylene and organoclays. Polymer, 45, 7639–7654.
7. Kontou, E., & Niaounakis, M. (2006). Thermo-mechanical properties of LLDPE/SiO2 nanocomposites. Polymer, 47(4), 1267–1280.
8. LeBaron, P. C., Wang, Z., & Pinnavaia, T. J. (1999). Polymer-layered silicate nanocomposites: An overview. Applied Clay Science, 15(1–2), 11–29.

9. Li, J., Gunister, E., & Barsoum, I. (2019). Effect of graphene oxide as a filler material on the mechanical properties of LLDPE nanocomposites. Journal of Composite Materials, 53(19), 2761–2773.
10. Liu, M., Horrocks, A.R, (2002). Effect of Carbon Black on UV stability of LLDPE films under artificial weathering conditions, Polymer Degradation and Stability, 75(3), 485-499.
11. Madejova, J., (2003), FTIR techniques in clay mineral studies, Vibrational Spectroscopy, 31, 1-10.
12. Mansoor, Z., Kowalczuk, M., Adamus, G., Manning, G., Parati, M., Radecka, I., & Khan, H. (2021). Polymers Use as Mulch Films in Agriculture—A Review of History, Problems and Current Trends. Polymers, 14(23), 5062.
13. Mezghani, K., Farooqui, M., Furquan, S., Atieh, M., (2011). Influence of carbon nanotube (CNT) on the mechanical properties of LLDPE/CNT nanocomposite fibers, Materials Letters, 65(23-24), 3633-3635.
14. Mir, S., Asghar, B., Khan, A. K., Rashid, R., Shaikh, A. J., Khan, R. A., & Murtaza, G. (2017). The effects of nanoclay on thermal, mechanical, and rheological properties of LLDPE/chitosan blend. Journal of Polymer Engineering, 37(2), 143–149.
15. Mousavi, S. M., Aghili, A., Hashemi, S. A., Goudarzian, N., Bakhoda, Z., & Baseri, S. (2016). Improved morphology and properties of nanocomposites, linear low-density polyethylene, ethylene-co-vinyl acetate, and nano clay particles by electron beam. Polymers from Renewable Resources, 7(4), 135–154.
16. Peacock, A.J. (2000). Handbook of Polyethylene: Structures, Properties, and Applications. CRC Press.
17. Sabetzadeh, M., Bagheri, R., & Masoomi, M. (2016). Effect of nanoclay on the properties of low-density polyethylene/linear low-density polyethylene/thermoplastic starch blend films. Carbohydrate Polymers, 141, 75–81.
18. Said, M., Challita, G., & Seif, S. (2020). Development of blown film linear low-density polyethylene-clay nanocomposites: Part B: Mechanical and rheological characterization. Journal of Applied Polymer Science, 137(16), Article 48590.
19. Stoeffler, K., Lafleur, P. G., Perrin-Sarazin, F., Bureau, M. N., & Denault, J. (2011). Micro-mechanisms of deformation in polyethylene/clay micro- and nanocomposites. Composites Part A: Applied Science and Manufacturing, 42(8), 916–927.
20. Yassin, A., & Günister, E. (2023). Optimization of thermal and rheological properties of HDPE-organoclay composite using response surface methodology. Gazi University Journal of Science, 36(1), 322-334.
21. Wadgaonkar, K., & Mehta, L. (2019). Enhancement of mechanical and barrier properties of LLDPE composite film via PET fiber incorporation for agricultural application. Polymers for Advanced Technologies, 30(5), 1031–1039.