Nonisothermal crystallization behavior of glass‐bead‐filled polypropylene

Yuan, Qiang; Jiang, Wei; An, Lijia; Misra, R.D.K.

doi:10.1002/app.24030

Cited by 10 publications

(4 citation statements)

References 75 publications

(73 reference statements)

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“…It is likely that the dispersed clay particles hinder the formation of large crystalline domains in the restricted and confined space. Interestingly, this behavior is similar to our observations in PP/glass bead blends 48. In Figure 5, the relationship between the relative degree of crystallinity and the temperature for the PE/clay nanocomposites at various cooling rate is presented.…”

Section: Resultssupporting

confidence: 86%

Nonisothermal crystallization behavior of melt‐intercalated polyethylene‐clay nanocomposites

Yuan

Awate

Misra

2006

J of Applied Polymer Sci

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The influence of nanoclay particles on the nonisothermal crystallization behavior of intercalated polyethylene (PE) prepared by melt-compounding was investigated. It is observed that the crystallization peak temperature (T p ) of PE/clay nanocomposites is slightly but consistently higher than the neat PE at various cooling rates. The half-time (t 0.5 ) for crystallization decreased with increase in clay content, implying the nucleating role of nanoclay particles. The nonisothermal crystallization data are analyzed using the approach of Avrami (Polymer 1971, 12, 150), Ozawa (Polym Eng Sci 1997, 37, 443), and Mo and coworkers (J Res Natl Bur Stand 1956, 57, 217), and the validity of the different kinetic models to the nonisothermal crystallization process of PE/clay nanocomposites is discussed. The approach developed by Mo and coworkers successfully explains the nonisothermal crystallization behavior of PE and PE/clay nanocomposites. The activation energy for nonisothermal crystallization of neat PE and PE/clay nanocomposites is determined using the Kissinger (J Res Natl Bur Stand 1956, 57, 217) method.

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Section: Resultssupporting

confidence: 86%

Nonisothermal crystallization behavior of melt‐intercalated polyethylene‐clay nanocomposites

Yuan

Awate

Misra

2006

J of Applied Polymer Sci

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“…The fibers acted as heterogeneous nucleating agents to facilitate crystallization, and the t 1/2 of composite was shortened under the effect of fibers. In addition, Misra and coworkers50 found that the t 1/2 was not only related to the addition of inorganic fillers, but also the contents and particle sizes of fillers.…”

Section: Resultsmentioning

confidence: 99%

Nonisothermal crystallization behavior of LLDPE/glass fiber composite

Liu

Yang

2008

J of Applied Polymer Sci

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ABSTRACT:The nonisothermal crystallization behavior of linear low-density polyethylene (LLDPE)/glass fiber (GF) composite was investigated by differential scanning calorimetry (DSC). It was observed that the crystallization temperature peak (T p ) of LLDPE composite containing 5.0 wt % GF (LLDPE/GF5) was higher than that of the pure LLDPE at various cooling rates. The half-time of crystallization (t 1/2 ) of LLDPE/GF5 composite was shortened under the effect of GF. The nonisothermal crystallization kinetics of LLDPE and LLDPE/GF5 composite were analyzed through the Avrami, Ozawa, and Mo equations. The results indicated that the data of the nonisothermal crystallization for LLDPE and LLDPE/GF5 composite calculated based on the Ozawa equation did not have the good linear relationship, but the nonisothermal crystallization behaviors of LLDPE and LLDPE/GF5 composite could be successfully described by the modified Avrami and Mo methods. The crystallization rate Z c of the modified Avrami parameter of LLDPE/GF5 composite was higher than that of pure LLDPE at the same cooling rate. The Mo parameter F(T) of LLDPE/GF5 composite was lower than that of LLDPE at the same degree of crystallinity. Through the Kissinger equation, the activation energies E d of LLDPE and LLDPE/GF5 composite were evaluated, and their values were 312.3 and 251.2 kJ/mol, respectively.

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“…Their geometry allows good dispersion and a close packing, resulting in an improved dimensional stability for different thermoplastics [13,28,29]. So far, many studies have been devoted to PP filled with the conventionally used inorganic soda lime glass, also known as A-glass [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49]. Other glass types, such as the borosilicate glass (E-glass), have established themselves as the filling material of choice for glass-fiber reinforced composites [50], also in connection with PP [51][52][53].…”

Section: Introductionmentioning

confidence: 99%

Optimization of mechanical properties of glass‐spheres‐filled polypropylene composites for extrusion‐based additive manufacturing

et al. 2017

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Polypropylene (PP) parts produced by extrusion‐based additive manufacturing (EB‐AM) suffer from warpage issues due to their high degree of crystallinity and orientations introduced during printing. These issues can be overcome by the addition of spherical fillers. However, the low aspect ratio of the filler and high filling degrees necessary for preventing warpage downgrade the mechanical properties, especially the toughness. This study aims at optimizing a PP‐compound containing spherical glass microspheres for the application in EB‐AM by maximizing the matrix–filler compatibility and therefore the printability, tensile properties and toughness, while still counteracting dimensional inaccuracies. A detailed study on the tensile, fracture, thermal, rheological, and impact properties of various compounds containing different glass types was conducted. It was shown that for EB‐AM applications, PP compounds based on borosilicate glass spheres outperform compounds filled with the conventionally used inorganic soda lime glass. The proposed optimized composite exhibits an exceptional interfacial adhesion between the microspheres and the matrix and a homogeneous filler distribution. It offers an improved processability and tensile properties up to the yield point comparable to those of neat PP. In a concluding impact test on printed composites, the optimized system exhibited impact energies 80% higher than compounds containing the conventionally used glass. POLYM. COMPOS., 40:638–651, 2019. © 2017 Society of Plastics Engineers

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Nonisothermal crystallization behavior of glass‐bead‐filled polypropylene

Cited by 10 publications

References 75 publications

Nonisothermal crystallization behavior of melt‐intercalated polyethylene‐clay nanocomposites

Nonisothermal crystallization behavior of melt‐intercalated polyethylene‐clay nanocomposites

Nonisothermal crystallization behavior of LLDPE/glass fiber composite

Optimization of mechanical properties of glass‐spheres‐filled polypropylene composites for extrusion‐based additive manufacturing

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