A powerful tool for preparing peripherally post-functionalized multiarm star block copolymer

Yigit, Nese Cakir; Hızal, Gürkan; Tunca, Ümit

doi:10.1007/s00289-017-2218-5

Cited by 10 publications

(3 citation statements)

References 25 publications

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“…Products made from green composites find extensive use in industries such as automotive, furniture, construction, and packaging 2–5 . Various natural fillers, including cellulose, 4,6 wood flour, 7 oak sawdust, 8 bagasse fiber, 9 eggplant (Solanum melongena) stalks, 10 hazelnut shell, 8,11–16 walnut shell, sunflower husk, 16 almond shell, 17 cocoa, 18 and eucalyptus fiber (Eucalyptus grandis), 19 are employed in the production of green composites. Additionally, materials such as coal, 20 basalt, 21 calcium carbonate, perlite, and potassium dichromate, 13 glass fiber, 14 mica, kaolin, wollastonite, silica, and so on, 22 are added to enhance the mechanical and thermal properties of green composites, resulting in hybrid composites.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and thermal characterization of elastomer modified polypropylene hybrid composites reinforced with hazelnut shell and wollastonite fillers

Karagöz,

Büyükkaya,

Demirer

et al. 2024

J of Applied Polymer Sci

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The demand for sustainable and recyclable materials in industrial applications has led to a surge in interest in green composites, particularly those incorporating natural fillers derived from agro‐food industry waste. This study investigates the mechanical and thermal properties of polypropylene (PP) hybrid composites filled with hazelnut shell and wollastonite, along with the effect of styrene‐ethylene/butylene‐styrene (SEBS) and SEBS‐g‐maleic anhydride (SEBS‐g‐MA) compatibilizers. Various characterization techniques, including tensile, flexural, and impact tests, as well as differential scanning calorimetry (DSC), thermogravimetry (TGA), and scanning electron microscopy (SEM) analyses, were employed to evaluate the composites. Results demonstrate that the addition of wollastonite significantly improves mechanical properties, while hazelnut shell filler affects thermal behavior and stability. SEBS and SEBS‐g‐MA compatibilizers enhance impact resistance; however, they lead to a decrease in other mechanical properties. DSC and TGA analyses demonstrate changes in crystallization behavior and thermal stability due to filler and compatibilizer incorporation. SEM microstructure images show the distribution of SEBS and SEBS‐g‐MA within the composite structure, affecting mechanical and thermal properties. Overall, this study highlights the importance of filler selection, compatibilizer addition, and their distribution in attaining desired properties for industrial applications. Future research should focus on optimizing formulations for specific uses and assessing long‐term performance under real‐world conditions.

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Section: Introductionmentioning

confidence: 99%

Mechanical and thermal characterization of elastomer modified polypropylene hybrid composites reinforced with hazelnut shell and wollastonite fillers

Karagöz,

Büyükkaya,

Demirer

et al. 2024

J of Applied Polymer Sci

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“…Önemli bir yaşayan/kontrollü radikal polimerizasyon tekniği olan atom transfer radikal polimerizasyonu (ATRP) kullanılarak istenilen mimari yapı ve molekül ağırlığına sahip polimerler sentezlenebilir (Öztürk ve Çakmak, 2008;Wang ve Matyjaszewski, 1995;Savaş ve Öztürk, 2023;Öztürk ve ark., 2016;Tunca ve ark., 2022). Kopolimerler sentezi günümüzde büyük ilgi görmektedir (Meyvacı ve ark., 2023;Ruzette ve Leibler, 2005;Altintas et al, 2011;Meyvacı ve Öztürk, 2022;Öztürk ve Türkoğlu, 2022;Öztürk and Cavicchi, 2018;Yigit et al, 2018;Dag et al, 2012). Bir polimere dallanmanın dahil edilmesi özelliklerini önemli ölçüde değiştirebilir, dolayısıyla bu tür makromoleküllerin hazırlanması malzeme biliminin ilgisini çeker (Öztürk ve Hazer, 2010).…”

Section: Introductionunclassified

Ters Atom Transfer Radikal Polimerizasyon Yöntemi ile Polietilen Glikol ve Polimetil Metakrilat İçeren Çok Dallı Ya Da Çapraz Bağlı Kopolimerlerin Sentezi ve Karakterizasyonu

ASAN,

ÖZTÜRK,

HAZER

2023

Karadeniz Fen Bilimleri Dergisi

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Bu çalışmada, ters atom transfer radikal polimerizasyonu (RATRP) metodu kullanılarak polietilen glikol (PEG) ve polimetil metakrilat (PMMA) bloklarını içeren çok dallı ya da çapraz bağlı kopolimerlerin sentezi gerçekleştirildi. Bunun için öncelikle, 4,4'-azobis(4-siyanopentanoik asit) ile fosfor pentaklorür reaksiyona sokularak 4,4'-azobis(4-siyanopentanoil klorür) (ACPC) elde edildi. Sentezlenen ACPC ile çeşitli molekül ağırlığına sahip PEG’ler (400 g.mol-1, 600 g.mol-1, 1000 g.mol-1, 1500 g.mol-1 ve 2000 g.mol-1) reaksiyona sokularak uç kısımlarında polietilen glikol içeren poliazoesterin (PAE) sentezi gerçekleştirildi. Elde edilen PAE ile metakriloil klorürün tepkimesinden metakriloil son uçlarına sahip polietilen glikol azoesterin (PAE-dimetakrioil) eldesi yapıldı. Ayrıca PAE ile 4-vinil benzil klorürün tepkimesinden 4-vinil benzil son uçlarına sahip polietilen glikol azoesterin (PAE-diVB) eldesi başarıldı. Son olarak PAE-dimetakrioil ve PAE-diVB kullanılarak metil metakrilatın RATRP ile çok dallı ya da çapraz bağlı kopolimerler sentezlendi. Sentezlenen ürünler FT-IR, 1H-NMR ve şişme değerleri (qv) teknikleri ile karakterilize edildi.

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“…Block and graft copolymers have applications in industry (Altintas et al, 2011;Altıntas and Tunca, 2011;Çatıker, Meyvacı et al, 2019;Bolton and Rzayev, 2012;Mitra et al, 2018;Hizal et al, 2005;Yigit et al, 2018;Muftuoglu et al, 2009;Dag et al, 2012;Durmaz et al, 2008). Atom transfer radical polymerization as a controlled/living radical polymerization technique has been widely used in copolymer synthesis (Öztürk, Yavuz et al, 2016;Ribelli et al, 2019;Król and Chmielarz, 2014) since first reported in 1995 (Wang and Matyjaszewski, 1995).…”

Section: Introductionmentioning

confidence: 99%

Poli(β-Propiyolakton)-b-Poli(Metil Metakrilat) Üç Kollu Blok Kopolimerinin Atom Transfer Radikal Polimerizasyonuyla Sentezi ve Karakterizasyonu

MEYVACI,

ÇATIKER,

ÖZTÜRK

2023

Karadeniz Fen Bilimleri Dergisi

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Terminally dibrominated poly(β-propiolactone) was prepared through sequentially ring-opening polymerization of β-propiolactone and dibromination of the former product. Synthesis of poly(β-propiolactone)-b poly(methyl methacrylate) tri-arm block copolymer was achieved by atom transfer radical polymerization of methyl methacrylate onto the poly(β-propiolactone) with bromide end groups. The characterization of the polymers was carried out using 1H-NMR, DSC, TGA, and GPC. GPC analysis of the final product resulted in an unimodal curve corresponding to the weight average molecular weight of 9353 g.mol-1. TGA analysis of the tri-arm block copolymer exhibited a two-step decomposition curve corresponding to the β-propiolactone and the methyl methacrylate blocks at 212 oC and 411 oC, respectively. DSC analysis of poly(β-propiolactone)-b poly(methyl methacrylate) tri-arm block copolymer showed two glass temperatures corresponding to the β-propiolactone and the methyl methacrylate blocks at -22.02 oC and 86.55 oC, respectively. The spectroscopic and thermal analyses proved that the tri-arm block copolymer was successfully synthesized through ring-opening polymerization and atom transfer radical polymerization, respectively.

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A powerful tool for preparing peripherally post-functionalized multiarm star block copolymer

Cited by 10 publications

References 25 publications

Mechanical and thermal characterization of elastomer modified polypropylene hybrid composites reinforced with hazelnut shell and wollastonite fillers

Mechanical and thermal characterization of elastomer modified polypropylene hybrid composites reinforced with hazelnut shell and wollastonite fillers

Ters Atom Transfer Radikal Polimerizasyon Yöntemi ile Polietilen Glikol ve Polimetil Metakrilat İçeren Çok Dallı Ya Da Çapraz Bağlı Kopolimerlerin Sentezi ve Karakterizasyonu

Poli(β-Propiyolakton)-b-Poli(Metil Metakrilat) Üç Kollu Blok Kopolimerinin Atom Transfer Radikal Polimerizasyonuyla Sentezi ve Karakterizasyonu

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