Poly(1‐butene)/clay nanocomposites: Preparation and properties

Wanjale, Santosh D.; Jog, J. P.

doi:10.1002/polb.10418

Cited by 43 publications

(30 citation statements)

References 34 publications

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“…The addition of nano-scale clays can change the crystallization kinetics, the crystalline morphology, the crystal forms, as well as crystallite size. [3][4][5][6][7][8][9][10][11][12][13] This difference in crystalline morphology, in turn, can significantly affect the overall mechanical and physical properties of the materials.…”

Section: Introductionmentioning

confidence: 99%

Non‐Isothermal Crystallization of Poly(trimethylene terephthalate) (PTT)/Clay Nanocomposites

Lesser

2004

Macro Chemistry & Physics

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Summary: The non‐isothermal crystallization of intercalated poly(trimethylene terephthalate) (PTT)/clay nanocomposites was investigated quantitatively by different methods. Non‐isothermal crystallization of pure PTT can be described by the Ozawa equation, but the Ozawa theory is not valid for PTT/clay nanocomposites. The addition of clay into PTT decreases the crystallization half‐time while increasing the crystallinity and crystallization rate. The PTT/modified clay nanocomposites, in turn, have a higher crystallization rate parameter, k1/n, and a lower crystallization half‐time compared to unmodified clay/PTT composites. The crystallization activation energy, calculated from Kissinger equation, of PTT, PTT/unmodified clay, and PTT/modified clay composites are 100, 180, and 198–230 kJ · mol−1, respectively. Similarly, the nucleating activities of the unmodified clay and modified clays are 0.73 and 0.51–0.58, respectively. Although the addition of clay increases the crystallization activation energy, the clay still acts as an effective nucleating agent and increases the crystallization rate and crystallinity of PTT. Further, the modified nanoscale clays are more effective nucleating agents than the unmodified counterparts, and the most effective nucleating concentration of nano‐clay is between 1.0–3.0 wt.‐%.The crystallization half‐time, t1/2, decreases as a function of cooling rate, Q, and decreases with an increase in clay concentration.magnified imageThe crystallization half‐time, t1/2, decreases as a function of cooling rate, Q, and decreases with an increase in clay concentration.

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Section: Introductionmentioning

confidence: 99%

Non‐Isothermal Crystallization of Poly(trimethylene terephthalate) (PTT)/Clay Nanocomposites

Lesser

2004

Macro Chemistry & Physics

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“…In the cited work on PB-based nanocomposites, an interesting affinity of PB with clay emerged. Differently from what normally happens with polypropylene or polyethylene, a rather extensive reduction of clay tactoid size could be achieved in PB [4][5][6][7]. This feature and the compatibility of PB with polypropylene open a potential for PB as a highly performing vector to include clay within a polypropylene matrix.…”

mentioning

confidence: 95%

“…One of the aims was in fact to investigate if these different formulations could attain different composite morphologies and dispersions of the filler in the matrix, therefore studying its effect on the polymer semicrystalline framework and on the rate of phase transformation. The morphology of the composite was in fact shown to be key for the property improvement, for the stability of the metastable phase and also for the acceleration of the rate of the II!I transition [4][5][6][7]. WAXD was used to follow the phase transition, acquiring diffractograms at different times after cooling from the melt.…”

Section: Physical Mechanical Propertiesmentioning

confidence: 99%

The effect of a synthetic double layer hydroxide on the rate of II→I phase transformation of poly(1-butene)

Marega¹,

Causin²,

Neppalli³

et al. 2011

Express Polym. Lett.

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“…The isothermal crystallization studies clearly indicated an enhancement in the crystallization rate, and resulted in a disturbed spherulitic morphology because of the dispersed clay layers [40,41] .…”

Section: Poly -1 -Butene (Pb)mentioning

confidence: 99%

Crystallization in Polymer Nanocomposites

Jog

2010

Optimization of Polymer Nanocomposite Properties

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Over the past decade, polymer nanocomposites have been a topic of great interest to research groups in both pure and applied materials science [1 -4] . These nanocomposites are two -phase materials wherein a fi ller with at least one dimension in the range of 1 to 100 nm is dispersed in the polymer matrix. Various nanofi llers such as carbon nanotube s ( CNT s), inorganic nanoparticles, or layered silicates such as clay are used. These nanocomposites show remarkable property improvements as compared to virgin polymers; moreover, this occurs at very low fi ller loadings when compared to conventional microcomposites. The properties of these nanocomposites are dependent on the morphology generated during their processing. In the case of semi -crystalline polymers, this is more crucial as the crystallization of polymers takes place during processing. A knowledge of the crystallization process, and the effect of these nanofi llers on the crystallization behavior of polymer nanocomposites, is therefore imperative to acquire an understanding of structure -property relationships in polymer nanocomposites.Crystallization in polymers has been the subject of great academic interest, as polymers are known to exhibit a variety of structures at various length scales, such as the unit -cell, lamella, and spherulites. The crystallization of polymers results in different morphologies, depending on the crystallization conditions and the presence of other components. The presence of a second phase either a polymer or a low -molecular -weight compound or inorganic fi ller has a profound effect on the crystallization of the polymer. In nanocomposites, the dimensions of the second phase are close to the chain dimensions, and a number of studies have attempted to elucidate the effect of nanosized fi llers on the crystallization kinetics, the crystalline morphology, and the crystalline forms of polymers. In this chapter, a brief review is presented of recent investigations into the effects of nanofi llers on various aspects of crystallization, such as isothermal crystallization, nonisothermal crystallization, spherulitic growth, and polymorphism.

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Poly(1‐butene)/clay nanocomposites: Preparation and properties

Cited by 43 publications

References 34 publications

Non‐Isothermal Crystallization of Poly(trimethylene terephthalate) (PTT)/Clay Nanocomposites

Non‐Isothermal Crystallization of Poly(trimethylene terephthalate) (PTT)/Clay Nanocomposites

The effect of a synthetic double layer hydroxide on the rate of II→I phase transformation of poly(1-butene)

Crystallization in Polymer Nanocomposites

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