Critical processing parameters for foamed bead manufacturing in a lab-scale autoclave system

Guo, Yong; Hossieny, Nemat; Chu, Raymond; Park, Chul; Nan-qiao, Zhou

doi:10.1016/j.cej.2012.10.043

Cited by 91 publications

(65 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This was because of existence of more available melt that could be crystallized during cooling while foaming occurred. In this context, the two distinct generated peaks can be observed at T s of 124°C, which resembles more to the double crystal melting peak used in EPP bead foaming [31,32].…”

Section: Crystallization Behavior Of the Epla Bead Foamsmentioning

confidence: 92%

“…Fig. 1 shows a schematic of this system and the detailed information is provided in [32]. First, the chamber was filled with 850 mL of water and then 15 g of PLA pellets with average particle diameter of 1 mm was added into the water.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

“…The water was used as a mixing media and to uniformly distribute the heat and the dissolved gas to the pellets while avoiding agglomeration of the pellets. There are many additives that can be added to the water to prevent the agglomeration of the beads [32], but since PLA is sensitive to hydrolysis, 20 mL of silicon oil was also added to the suspension media as a surfactant to prevent the agglomeration and to postpone the PLA's hydrolysis. This is because the used non-polar hydrophobic surfactant can cover the pellets' surface and the interaction between water and pellets was seen to be significantly minimized.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

“…Bead foaming has been introduced as a continuous foam manufacturing technology to produce low-density foam products with three dimensional complex geometries [25][26][27][28][29][30][31][32][33][34][35][36][37][38]. In this technology, numerous low-density foam beads are molded into the desired final product shape.…”

Section: Introductionmentioning

confidence: 99%

“…This will provide bead foam products with superior mechanical properties while a short/less expensive processing route is applied. We should also mention that this manufacturing technique has been used to produce expanded polyolefins, specifically expanded polypropylene (EPP) bead foams [25][26][27][28][29][30][31][32] but has not been utilized for other materials, especially for PLA with low melt strength and slow crystallization kinetics.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

A novel technology to manufacture biodegradable polylactide bead foam products

2015

Self Cite

View full text Add to dashboard Cite

Section: Crystallization Behavior Of the Epla Bead Foamsmentioning

confidence: 92%

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A novel technology to manufacture biodegradable polylactide bead foam products

2015

Self Cite

View full text Add to dashboard Cite

Microcellular Plastics

Wong

Guo

Kumar

et al. 2016

Encyclopedia of Polymer Science and Technology

View full text Add to dashboard Cite

Microcellular plastics are typically thermoplastic polymers with a large number (∼billions per cm3) of tiny bubbles (of the order of 10 μm in diameter). Their densities can range from 3% to 95% of the solid polymer depending on the volume taken by the bubbles (which are denoted as cells in this paper). In general, microcellular plastics exhibit superior impact strength, toughness, fatigue life, thermal stability, dielectric strength, thermal and acoustical insulation performance, as well as optical properties, relatively to the solid counterparts. Other advantages of microcellular plastics include higher productivity due to its faster processing times and sink‐mark free injection‐molded parts with no residual stress and high dimensional stability. Owing to these unique properties, there are a large number of applications of microcellular plastics, particularly in automotive industries. This article summarizes the science and technology of microcellular plastics. To be specific, their history, science (ie, generation of polymer–gas solution, cell nucleation, growth, deterioration and stabilization), solid‐state processing technologies, continuous processing technologies (ie, extrusion and injection molding), design guidelines of each processing technologies, as well as the properties and application of microcellular plastics, are discussed in detail.

show abstract

Polyamide 6 modified polypropylene with remarkably enhanced mechanical performance, thermal properties, and foaming ability via pressure‐induced‐flow processing approach

Chen

Peng

et al. 2018

Adv Polym Technol

View full text Add to dashboard Cite

Pressure‐induced‐flow (PIF) processing has been considered as an efficient approach to prepare high‐performance polymer materials. In this study, the effects of PIF processing on various properties of PP/PA6 blend, including the microstructure, thermal, and mechanical properties, as well as foaming behavior, were investigated. The results showed that PIF processing had a significant effect on the microstructure of PP/PA6 blend. Meanwhile, the thermal stability of PP/PA6 blend was greatly improved. Compared to its counterparts without PIF processing, the mechanical strength of PIF PP/PA6 blend was remarkably enhanced, which was even higher than that of PIF PP (Polypropylene). PIF processing could both strengthen and toughen PP/PA6 blend. Dynamic mechanical analysis (DMA) results also indicated that PIF PP/PA blend had higher strength under dynamic mechanical conditions. Furthermore, the PP/PA6 foams with and without PIF processing were fabricated using a batch foaming method. With PIF processing, the resultant PP/PA6 blend displayed a significantly enhanced foaming ability with higher cell density and larger expansion ratio.

show abstract

Critical processing parameters for foamed bead manufacturing in a lab-scale autoclave system

Cited by 91 publications

References 30 publications

A novel technology to manufacture biodegradable polylactide bead foam products

A novel technology to manufacture biodegradable polylactide bead foam products

Microcellular Plastics

Polyamide 6 modified polypropylene with remarkably enhanced mechanical performance, thermal properties, and foaming ability via pressure‐induced‐flow processing approach

Contact Info

Product

Resources

About