Physical and mechanical properties of Al(OH)<sub>3</sub>/polypropylene composites modified by in situ‐functionalized polypropylene

Mai, Kancheng; Li, Zhengjun; Qiu, Yue; Zeng, Hanmin

doi:10.1002/app.10269

Cited by 18 publications

(17 citation statements)

References 34 publications

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“…[35][36][37][38][39][40][41] The experiments showed that the general properties of Al(OH) 3 /PP and Mg(OH) 2 /PP composites modified by functionalised PP (FPP) or acrylic acid were better than those of unmodified composites.…”

Section: Introductionmentioning

confidence: 99%

Physical and mechanical properties of nano-CaCO₃/PP composites modified with acrylic acid

Huang¹,

Lin²,

Cai³

et al. 2004

Plastics, Rubber and Composites

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Nano-CaCO 3 /polypropylene (PP) composites modified by the reactive monomer acrylic acid (AA) with or without the initiator dicumyl peroxide (DCP) were prepared using a two-step method. The effects of nano-CaCO 3 and AA on the physical and mechanical properties of nano-CaCO 3 /PP composites were investigated. Differential scanning calorimetry (DSC) results showed that the incorporation of nano-CaCO 3 increased the crystallisation temperature as a result of the heterogeneous nucleation effect of nano-CaCO 3 on PP, and induced the formation of b phase PP. The addition of AA further increased the crystallisation temperature of PP and the intensity of b phase PP. The mechanical tests indicated that nano-CaCO 3 could simultaneously reinforce and toughen PP, and the mechanical properties of nano-CaCO 3 /PP composites were higher than those of micro-CaCO 3 /PP composites. In addition, incorporation of AA further increased the mechanical properties of the composites. In the presence of DCP, a small amount of AA could increase markedly the mechanical properties of nano-CaCO 3 /PP composites.

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Section: Introductionmentioning

confidence: 99%

Physical and mechanical properties of nano-CaCO₃/PP composites modified with acrylic acid

Huang¹,

Lin²,

Cai³

et al. 2004

Plastics, Rubber and Composites

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“…The DSC melting results of PP modified by additive PP and in situ FPP are presented in Table II. Studies on functionalized PP20–24 have shown that the T

_{italicon}^{italicm}

and T

_{italicp}^{italicm}

of FPP were 147.8 and 153.0°C, respectively, both of which are lower than that of M‐0, 159.1 and 163.2°C, respectively. The Δ H m (74.7 J/g) of FPP is also much less than that of MF‐0 (95.0 J/g).…”

Section: Resultsmentioning

confidence: 95%

“…Figure 1 shows DSC cooling and heating curves of PP modified by additive FPP and PP modified by in situ FPP, and the crystallization and melting parameters are presented in Table I. Studies on functionized PP20–24 have shown that the temperature in which the crystallization curve deviates from the baseline ( T

_{°}^{italicc}

) and the peak temperature of crystallization ( T

_{italicp}^{italicc}

) of FPP were 125.4 and 116.4°C, respectively, both lower than that of pure PP (sample M‐0). However, it can be seen from Table II that the temperature at onset of crystallization ( T

_{italicon}^{italicc}

) and the T

_{italicp}^{italicc}

of sample MF‐0 prepared from PP modified by the addition of 5 phr FPP were higher than those of M‐0, indicating that a small amount of FPP had a nucleation effect on PP.…”

Section: Resultsmentioning

confidence: 99%

Crystallization and melt behavior of magnesium hydroxide/polypropylene composites modified by functionalized polypropylene

Lin

Qiu

Mai

2004

J of Applied Polymer Sci

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ABSTRACT:The crystallization and melting behavior of Mg(OH) 2 /polypropylene (PP) composites modified by the addition of functionalized polypropylene (FPP) or acrylic acid (AA) and the formation of in situ FPP were investigated by DSC. The results indicated that addition of FPP increased crystallization temperatures of PP attributed to the nucleation effect of FPP. The formation of in situ FPP resulted in a reduced crystallization rate, melting point, and degree of crystallization because of the decreased regularity of the PP chain. For the Mg(OH) 2 /PP composites, addition of Mg(OH) 2 increased the crystallization temperatures of PP attributed to a heterogeneous nucleation effect of Mg(OH) 2 . Addition of FPP into Mg(OH) 2 /PP composites further enhanced the crystallization temperatures of PP. It is suggested that there is an activation of FPP to the heterogeneous nucleation effect of Mg(OH) 2 surface. The addition of AA also increased the crystallization temperatures of PP in Mg(OH) 2 /PP composites, but crystallization temperatures of PP were not influenced by the AA content, a phenomenon explained by the heterogeneous nucleation effect of the Mg(OH) 2 surface activated by FPP and AA. A synergistic effect on crystallization of PP in Mg(OH) 2 /PP composites further increased the crystallization temperatures of PP. However, the crystallization temperatures of Mg(OH) 2 /PP composites modified by in situ FPP were lower than those of Mg(OH) 2 /PP composites modified by the addition of FPP or AA.

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“…In our laboratory, Al(OH) 3 /PP composites modified by the addition of functionalized polypropylene (FPP); and grafting monomer and by the formation of in situ FPP were prepared. The physical and mechanical properties of modified Al(OH) 3 /PP composites were investigated systematically 10–14. Recently, modified Mg(OH) 2 /PP composites were prepared in our laboratory.…”

Section: Introductionmentioning

confidence: 99%

Fracture morphology of Mg(OH)₂/polypropylene composites modified by functionalized polypropylene

Qiu

Lin

Mai

2003

J of Applied Polymer Sci

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ABSTRACT:The morphologies of the fracture surface under impact and flexural testing of Mg(OH) 2 /Polypropylene (PP) composites and their modified composites were investigated by scanning electron microscopy. Experimental results indicated that addition of functionalized polypropylene (FPP) and acrylic acid (AA) and the formation of in situ FPP changed the fracture morphologies of Mg(OH) 2 /PP composites. We believe that addition of these modifiers improved the interfacial interaction and enhanced the interface adhesion between the particle and the matrix in Mg(OH) 2 /PP composites. The degree of improvement was more significant in Mg(OH) 2 /PP composites modified by the formation of in situ FPP. At low Mg(OH) 2 content, 2 phr AA exhibited a marked effect, but at high Mg(OH) 2 content, 4 phr AA afforded good effect. Due to the improved interface adhesion by interface interactions the fracture mechanism transformed from interface debonded fracture into a matrix fracture.

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Physical and mechanical properties of Al(OH)₃/polypropylene composites modified by in situ‐functionalized polypropylene

Cited by 18 publications

References 34 publications

Physical and mechanical properties of nano-CaCO₃/PP composites modified with acrylic acid

Physical and mechanical properties of nano-CaCO₃/PP composites modified with acrylic acid

Crystallization and melt behavior of magnesium hydroxide/polypropylene composites modified by functionalized polypropylene

Fracture morphology of Mg(OH)₂/polypropylene composites modified by functionalized polypropylene

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Physical and mechanical properties of Al(OH)3/polypropylene composites modified by in situ‐functionalized polypropylene

Cited by 18 publications

References 34 publications

Physical and mechanical properties of nano-CaCO3/PP composites modified with acrylic acid

Physical and mechanical properties of nano-CaCO3/PP composites modified with acrylic acid

Crystallization and melt behavior of magnesium hydroxide/polypropylene composites modified by functionalized polypropylene

Fracture morphology of Mg(OH)2/polypropylene composites modified by functionalized polypropylene

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Product

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Physical and mechanical properties of Al(OH)₃/polypropylene composites modified by in situ‐functionalized polypropylene

Physical and mechanical properties of nano-CaCO₃/PP composites modified with acrylic acid

Physical and mechanical properties of nano-CaCO₃/PP composites modified with acrylic acid

Fracture morphology of Mg(OH)₂/polypropylene composites modified by functionalized polypropylene