Influence of an Increased Fiber Filler Content on the Elongation Behavior of Filled Films in the Thermoforming Process
Lisa-Maria Wittmann,
Michael Wolf,
Dietmar Drummer
Issue:
Volume 3, Issue 2, June 2019
Pages:
25-35
Received:
15 May 2019
Accepted:
15 June 2019
Published:
26 June 2019
Abstract: Thermoforming belongs to one of the most important processes in polymer processing, especially in the packaging industry. It enables the forming of thermoplastic components into shaped parts at high temperatures. Since the thermoforming of films takes place in the rubbery state, amorphous thermoplastics are mainly processed, which have a wide rubbery state. Radiation crosslinking can be used to widen the thermoforming window of semi-crystalline thermoplastics. A benefit of the crosslinking is the increased short-term temperature resistance. In general, there are only a few investigations concerning the thermoforming of filled thin films. Within this investigation, the influence of an increasing glass fiber content up to 15 vol.-% as well as the effect of radiation crosslinking on the elongation behavior and the wall thickness distribution was examined. It can be summarized that especially thermoforming with an increased filler content at high areal draw ratios represents a challenge. Whereas non-crosslinked glass fiber filled films are thermoformable only at low areal draw ratios, radiation crosslinked films can be also formed at higher areal draw ratios without difficulties. For high filler contents and high areal draw ratios, no forming is possible at high areal draw ratios, although the films have been crosslinked. The use of radiation crosslinking enables the process limit in thermoforming of thin filled films to be increased and thus the range of applications to be extended greatly.
Abstract: Thermoforming belongs to one of the most important processes in polymer processing, especially in the packaging industry. It enables the forming of thermoplastic components into shaped parts at high temperatures. Since the thermoforming of films takes place in the rubbery state, amorphous thermoplastics are mainly processed, which have a wide rubbe...
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Mechanical and Water Absorption Properties of Polymeric Compounds
Okonkwo Ebere Onyekachi,
Kingsley Ogemdi Iwuozor
Issue:
Volume 3, Issue 2, June 2019
Pages:
36-46
Received:
20 November 2018
Accepted:
26 June 2019
Published:
10 July 2019
Abstract: The use of polymers in reinforcement is a field that is gradually gaining momentum in the world of material science. The use of these polymers aids in reducing the menace of pollution attributed in the production of these materials. Till now, no work has been done on the use of polyacrylic resin in the reinforcement of material and that is what this research tries to throw more light on. This work is aimed at studying the effect of water absorption and the mechanical properties of polymeric Portland cement, Polymeric Barite and Polymeric Calcium carbonate, all locally blended in various ratios. The Mechanical and Water absorption properties of the mixture of Polyacrylic resin and Cement, Polyacrylic resin and Barite and Polyacylic resin and Calcium carbonate was analyzed. Eight different ratios of the Resin and Fillers were used in this work, viz; 90:10, 80:20, 70:30, 60:40, 50:50, 40:60, 30:70, 25:75, and 100% of the Polymer. The Compressive, Tensile and Fleuxeral abilities of the wood samples were used to determine its Mechanical abilities. The experimental result obtained showed that as the resin was decreased, the strength as well as the Water absorption ability of the materials increased until it got to a peak from where it starts to decrease.
Abstract: The use of polymers in reinforcement is a field that is gradually gaining momentum in the world of material science. The use of these polymers aids in reducing the menace of pollution attributed in the production of these materials. Till now, no work has been done on the use of polyacrylic resin in the reinforcement of material and that is what thi...
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