In‐situ Synthesis and Characterization of Polyamide 6/POSS Nanocomposites

Ramasundaram, Subramaniya Pillai; Kim, Kap Jin

doi:10.1002/masy.200750348

Cited by 27 publications

(16 citation statements)

References 21 publications

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“…The model predicts both increases and decreases in T g dependant upon specific interactions and shows good agreement with the experimental data noted above [28]. A situation does exist where significant increases in the glass transition temperature have been noted involving polyhedral oligomeric silsesquioxane (POSS) cage structures chemically reacted into the polymeric network [31][32][33][34]. These cage structures with a particle diameter in the range of 1-3 nm can be functionalized to provide chemical reactivity with various polymer systems.…”

Section: Fundamental Considerationssupporting

confidence: 61%

“…These cage structures with a particle diameter in the range of 1-3 nm can be functionalized to provide chemical reactivity with various polymer systems. Examples include octavinyl (R ¼ vinyl group) incorporation for copolymerization with PMMA [31], amine groups for incorporation into polyamides [32] and polyimides [33]. This parallels the glass transition increase often noted in the sol-gel inorganic-organic networks.…”

Section: Fundamental Considerationsmentioning

confidence: 96%

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Polymer nanotechnology: Nanocomposites

Paul

Robeson

2008

Polymer

3,011

1,805

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a b s t r a c tIn the large field of nanotechnology, polymer matrix based nanocomposites have become a prominent area of current research and development. Exfoliated clay-based nanocomposites have dominated the polymer literature but there are a large number of other significant areas of current and emerging interest. This review will detail the technology involved with exfoliated clay-based nanocomposites and also include other important areas including barrier properties, flammability resistance, biomedical applications, electrical/electronic/optoelectronic applications and fuel cell interests. The important question of the ''nano-effect'' of nanoparticle or fiber inclusion relative to their larger scale counterparts is addressed relative to crystallization and glass transition behavior. Of course, other polymer (and composite)-based properties derive benefits from nanoscale filler or fiber addition and these are addressed.

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Section: Fundamental Considerationssupporting

confidence: 61%

Section: Fundamental Considerationsmentioning

confidence: 96%

Polymer nanotechnology: Nanocomposites

Paul

Robeson

2008

Polymer

3,011

1,805

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“…Values of τ 0 and E a are given in Table 3. The β-relaxation is phenomenologically linked to the mechanical properties of polymeric materials [28,29]. From Table 3, one can see that symbatic changes of E a and Young's modulus for the composites shows that the presence of fullerene hampers the molecular motions in the composites, leading to hardening of the polymer chains and impeding secondary relaxation processes.…”

Section: Dielectric Spectroscopymentioning

confidence: 99%

“…Although the immobilization is a reasonable reinforcing mechanism and its molecular origin is well documented [27][28][29], a precise prediction or simulation of its extent for various composite systems still represents an intriguing unresolved problem.…”

Section: Dielectric Spectroscopymentioning

confidence: 99%

Dielectric relaxation of fulleroid materials filled PA6 composites and the study of its mechanical performance

Sinitsin¹,

Zuev²

2015

Nanosist.: fiz. him. mat.

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The effect of fulleroid materials (fullerene C 60 and fullerene soot which is used for fullerenes production) on the mechanical properties of polymer nanocomposites based on polyamide 6 (PA6) was investigated. Composites were synthesized by direct mixing in an extruder. Dielectric spectroscopy was used to investigate the influence of nanoparticles on relaxation processes in the polymer matrix. It is found that the segmental relaxation processes becomes faster with the addition of fullerene C 60 . In contrast, the secondary processes of PA6/fullerene C 60 nanocomposites were observed to slow down with the addition of fullerene C 60 . This means that the local 'molecular stiffness' is increased, and a phenomenological link between the secondary relaxation times and the mechanical properties explains the increase in the Young's modulus of the nanocomposites upon the addition of C 60 . These observations suggest that nanoparticles can have a qualitatively different effect on the matrix polymer dynamics at different length scales, and caution must be taken in comparing the changes in the dynamics associated with different relaxation processes.

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“…Inactive organic substituents make POSS physically compatible with relevant polymers and promote dispersion in the polymer at a molecular level [13], while substituents that are reactive promote curing or grafting reactions [14]. Thermoplastics such as polypropylene [15,16], polycarbonate [17,18], and polyamide [19,20], and thermosets such as epoxy [21,22] have been reinforced with POSS. Previous results indicate that adding POSS to a matrix system can increase thermal and mechanical properties [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Effect of polyhedral-oligomeric-sil-sesquioxanes on thermal and mechanical behavior of SC-15 epoxy

Jones¹,

Zhou²,

Jeelani³

et al. 2008

Express Polym. Lett.

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Abstract. In this study, thermal and mechanical properties of nanocomposites containing SC-15 epoxy resin and polyhedral-oligomeric-sil-sesquioxanes (POSS) have been studied. Dynamic Mechanical Analysis (DMA) results show that the addition of 5 wt% of POSS yielded a 13% increase in the storage modulus and a 16°C enhancement in Tg. Thermo gravimetric Analysis (TGA) results show that the thermal stability of epoxy increased with higher POSS content. Tension tests were used to evaluate the mechanical properties of materials. Both modulus and tensile strength are linear functions of POSS content. Scanning Electric Microscopy (SEM) pictures of fracture surfaces show that the roughness of the fracture surfaces of epoxy increased after adding POSS. Based on experiment results, a three-parameter nonlinear constitutive equation was developed to describe the strain-softening stress-strain relationship behavior of materials. The parameters in this model are the elastic modulus, a strain exponent, m, and a compliance factor, β. Their relationships to the POSS weight fraction were obtained from the experiment results. The simulated stress-strain curves from the model agree with the test data. Analysis of the model shows that both the strain exponent, m, which controls the strain softening and hardening effect of the material, and the compliance parameter, β, which controls the flow stress level of the material, increase with higher POSS content.

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In‐situ Synthesis and Characterization of Polyamide 6/POSS Nanocomposites

Cited by 27 publications

References 21 publications

Polymer nanotechnology: Nanocomposites

Polymer nanotechnology: Nanocomposites

Dielectric relaxation of fulleroid materials filled PA6 composites and the study of its mechanical performance

Effect of polyhedral-oligomeric-sil-sesquioxanes on thermal and mechanical behavior of SC-15 epoxy

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