Preparation and crystallization behaviour of PP/PP-g-MAH/Org-MMT nanocomposite

Xu, Weibing; Liang, Guodong; Zhai, Hua; Tang, Shupei; Hang, Guo-Pei; Pan, Wei‐Ping

doi:10.1016/s0014-3057(03)00015-6

Cited by 119 publications

(76 citation statements)

References 22 publications

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“…[9] To achieve better compatibility between the organo-montmorillonite (OM) and the strongly hydrophobic PP matrix, and hence better clay exfoliation, maleic-anhydride-grafted PP (PP-g-MA) has been used instead or added to PP in large quantities as ''compatibilizer''. [9][10][11][12][13][14][15][16] With increasing content of PP-g-MA and anhydride functionality, enhanced exfoliation and intercalation was achieved. However, PP-g-MA is usually of low molar mass because the free radical grafting process is often accompanied by chain scission and some of the added compatibilizers are oligomers.…”

Section: Introductionmentioning

confidence: 99%

Poly(propylene)‐Layered Silicate Nanocomposites: Gas Permeation Properties and Clay Exfoliation

Osman

Mittal

Suter

2007

Macro Chemistry & Physics

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To monitor the mineral surface coverage and energy, the inorganic cations of two clays (montmorillonite) with different surface area/cation have been exchanged by alkylammonium ions, carrying alkyl chains of different number and length. The prepared OMs were free of unreacted organic ions. With increasing length and number of the alkyl chains, an increase in the basal‐plane spacing (d‐spacing) of the OM was observed. The d‐spacing also increased with increasing CEC of the clay (decreasing available area/cation). The OMs were compounded with PP and their effect on the crystallinity and gas‐barrier properties of the polymer was investigated. The OM had no influence on the degree of crystallinity of PP under the processing conditions used. Oxygen permeation through the composites decreased, depending on the cross‐sectional area of the exchanged organic cation and the CEC of the clay. These parameters control the mineral surface coverage (consequently the surface energy) as well as the tilt angle of the alkyl chains to the mineral surface, and hence the d‐spacing. Increasing the length of the alkyl chains and their number per cation enhanced the d‐spacing, clay exfoliation, and the gas‐barrier properties of the composites. A mixed morphology, consisting of delaminated aluminosilicate layers and OM tactoids of varying thickness was observed but no intercalation took place. The oxygen permeation coefficient of the nanocomposites was found to be a non‐linear function of the volume fraction of the inorganic part of the OM.magnified image

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Section: Introductionmentioning

confidence: 99%

Poly(propylene)‐Layered Silicate Nanocomposites: Gas Permeation Properties and Clay Exfoliation

Osman

Mittal

Suter

2007

Macro Chemistry & Physics

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“…The materials used in this study include, natural rubber SIR-20, from PT Santos Ruber Jakarta, polypropylene copolymer was obtained from Production Singapore. This polymer has melting point of 176 °C, and density of 0.896 g/cm 3 . Polypropylene grafted maleic anhydride (PP-g-MA) was obtained from Japan.…”

Section: Methodsmentioning

confidence: 99%

“…However, since the essential modulus and mechanical strength as well as thermal resistance are low, natural rubber is commonly blended with other materials, one of them is polypropylene (PP). Several studies have reported that blending of natural rubber with PP resulted in characteristic improvement, such as increased thermal stability [1], decreased fracture elongation [2], and increased Young's modulus [3]. However, the NR/PP was found to exhibit low abrasion resistance, tear strength, and high rolling strength, which make it unsuitable for many practical uses of rubber materials, such as tire.…”

Section: Introductionmentioning

confidence: 99%

The Effect Zeolite Addition in Natural Rubber Polypropylene Composite on Mechanical, Structure, and Thermal Characteristics

Bukit¹,

Frida²

2014

MST

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This study was conducted to determine the effect of zeolite as filler on mechanical properties, and thermal structure blends of natural rubber and polypropylene (NR/PP). In this study, NR/PP/PP-g-MA blends was filled uncalcined zeolite and calcined zeolite at different weight percent of the 2, 4, and 6%. Samples were characterized to determine the tensile strength, fracture elongation and Young's modulus. Structure of the samples was investigated using XRD method and thermal characteristics were analyzed using DTA/TGA technique. The results obtained for tensile strength showed a significant influence with the addition zeolite of the NR/PP blends at 2% by weight of the composition (8 MPa) and decreased with increasing zeolite composition uncalcined zeolite or calcined zeolite. At 2% to 6% by weight of an increase in Young's modulus, for which uncalcined zeolite function more effectively than the calcined zeolite. On the other hand, the addition of uncalcined zeolite and calcined zeolite did not result in decreased fracture elongation. The XRD analysis zeolite indicate the existence of amorphous phase and crystalline mineral type mordenite (CaAl 2 Si 10 O 24 .7 H 2 O). In general, cristality of samples filled with calcined zeolite slightly higher than the uncalcined zeolite at the same amount and intercalation occurs between the zeolite matrix NR/PP. Thermal analysis showed that the samples are filled with calcined zeolite has a thermal resistance higher than the uncalcined zeolite, the melting point NR/PP 165.0 °C with the addition of 6 wt% zeolite melting point to 186.7 °C. AbstrakPengaruh Penambahan Zeolit pada Komposit Karet Alam Polipropilena terhadap Sifat Mekanik, Struktur dan Termal. Penelitian ini dilakukan untuk mengetahui pengaruh zeolit sebagai bahan pengisi terhadap sifat mekanik, struktur dan termal dari campuran karet alam dan polypropylene (NR/PP). Dalam penelitian ini, campuran NR/PP/PP-g-MA diisi dengan zeolit tanpa kalsinasi dan zeolit kalsinasi pada persen berat yang berbeda yakni 2, 4, dan 6%. Sampel dikarakterisasi untuk menentukan kekuatan tarik, perpanjangan putus dan modulus Young. Struktur sampel diteliti menggunakan metode XRD dan karakteristik termal dianalisis dengan menggunakan DTA/TGA. Hasil yang diperoleh untuk kekuatan tarik menunjukkan adanya pengaruh yang signifikan dengan penambahan zeolit pada campuran NR/PP pada komposisi 2% berat (8 MPa) dan terjadi penurunan dengan bertambahnya komposisi zeolit baik kalsinasi maupun tanpa kalsinasi. Pada 2% sampai 6% berat modulus Young terjadi peningkatan, untuk zeolit yang tidak dikalsinasi berfungsi lebih efektif dibandingkan dengan zeolit kalsinasi. Di sisi lain, penambahan zeolit kalsinasi dan tidak dikalsinasi menghasilkan penurunan perpanjangan putus. Analisis XRD dari zeolit menunjukkan adanya fase amorf dan kristal tipe mineral mordenite (CaAl 2 Si 10 O 24 .7 H 2 O). Secara umum, kristalitas dari sampel yang diisi dengan zeolit kalsinasi sedikit lebih tinggi dari pada zeolit tanpa kalsinasi pada jumlah yang sama dan terjadi ...

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“…5) [64]. The resulting crystal structure of PP in this type of fiber/PP composites exhibits lower lamellae thickness but is less disposed to recrystallization and is more stable [65][66][67] Recently, much attention has been paid to PP-nanocomposites, produced by different techniques and containing mainly carbon nanotubes/nanofibers or layered silicates [68][69][70][71][72][73][74][75][76][77][78][79]. Numerous reports describe the fabrication of a range of PP-nanocomposites, and, in particular, the impact of nanofillers on the crystallization of a matrix.…”

Section: Nucleation and Its Experimental Evaluationmentioning

confidence: 99%

Crystallization of Polypropylene: Application of Differential Scanning Calorimetry Part Ii. Crystal Forms and Nucleation

Raka¹,

Bogoeva‐Gaceva²

2017

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Preparation and crystallization behaviour of PP/PP-g-MAH/Org-MMT nanocomposite

Cited by 119 publications

References 22 publications

Poly(propylene)‐Layered Silicate Nanocomposites: Gas Permeation Properties and Clay Exfoliation

Poly(propylene)‐Layered Silicate Nanocomposites: Gas Permeation Properties and Clay Exfoliation

The Effect Zeolite Addition in Natural Rubber Polypropylene Composite on Mechanical, Structure, and Thermal Characteristics

Crystallization of Polypropylene: Application of Differential Scanning Calorimetry Part Ii. Crystal Forms and Nucleation

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