The SPE Library contains thousands of papers, presentations, journal briefs and recorded webinars from the best minds in the Plastics Industry. Spanning almost two decades, this collection of published research and development work in polymer science and plastics technology is a wealth of knowledge and information for anyone involved in plastics.
Lightweight reinforced thermoplastic (LWRT) composites are ideal for the recreational vehicle (RV) industry where traditional building materials are unable to provide the performance required. The LWRT composite is more durable and can be assembled for RV exterior and interior sidewall, ceilings, and roofs of both towables and motorhomes. Due to lighter weight, LWRT-based RVs may provide opportunity for towing with smaller vehicles, can be more fuel efficient, or can carry more cargo than traditional, wood-based RVs. This paper presents the initial investigations into the properties of LWRT composite panel produced from recycled (or old) corrugated cardboard (OCC) fiber, glass fiber and thermoplastic materials using a wet-laid process. New composite systems have been obtained varying the loading levels of OCC fibers (0, 10, and 20 %) and density of the resultant composite panels. The flexural test results showed panels made from OCC fibers were 30 to 50 % stronger and stiffer in machine direction (MD) and 30 to 40 % stronger and stiffer in cross-machine direction (CD) than the control composite material without OCC fibers. The sound absorption properties of the composite panels containing OCC fibers depend on the loadings of OCC fibers and the density of the panel, and 20 % OCC fiber-based composite showed best sound absorption results. The addition of OCC fiber resulted in a smoother surface and better aqueous glue compatibility than the control composite material. In addition, the flame retardancy results showed the addition of OCC fibers decreased the flame spreadability (FSI = 30) according to ASTM E84 standard. The results suggested that sustainable fibers could be used to produce strong and stiff composite panels with significantly lighter weight.
Cellulose nanocrystals (CNCs) have drawn significant attention in recent years owing to their specific strength, renewability, widespread availability and relatively low cost. As a result, they have gained scientific and commercial interest and are currently produced at a pilot scale in many jurisdictions for several polymer composite applications. However, their poor dispersion in typically non-polar polymer resins limits the translation of their exceptional nanoscale properties to the macroscale. In this paper,we presenteda method for the surface modification of CNC by grafting polylactic acid(PLA) onto CNCs. The dispersibility of the native and surface modified CNCs(SMCNC)in rubber latex is compared and reported here. SMCNC showed a very good dispersibility in both water and chloroprene rubber(CR)which make it a good candidate for latex composite applications.
Hybrid Molding is an emerging molding technology that is used in composite products. It has integrated molding characteristics, which can integrate multi-step process, save cost, reduce cycle time and make the product multifunctional. However, it is very hard to know what happened between composite sheet and melt during the process. In this study, we try to use CAE software to simulate the hybrid molding process. From the analysis results, it is possible to know the temperature change of composite sheet at any time and any place during the hybrid molding process, thereby helping to optimize the process and avoid possible problems.
In this paper, high-performance thermotropic liquid crystalline polymer (TLCP)/polypropylene (PP) and glass fiber (GF)/PP composites were prepared by the injection molding process. Mechanical recycling of TLCP/PP and GF/PP composites consisted of grinding of the injection molded specimens and further injection molding of the granules. The influence of mechanical recycling on mechanical and thermal properties was investigated. In situ TLCP/PP maintains tensile modulus and strength during the recycling process, indicating the regeneration of polymeric fibrils at each reprocessing stage. GF/PP composite exhibits deterioration of mechanical properties after recycling because of fiber breakage during processing, which is a very common issue on reusing glass or carbon fiber reinforced composites. The experimental results reveal that the TLCP/PP composite has better recyclability than GF/PP and significantly enhances the mechanical properties of the blend.
Wood and plastic are best friends these days. They can be combined to give the aesthetics of wood with the added durability of plastic. Termed as wood/plastic composites - WPCs' are a relatively new family of thermoplastic composites based on wood-fibres and the commodity thermoplastics. The polymers used for WPCs' are the high volume, low cost, commodity thermoplastics - polyethylene, polypropylene and PVC.
Technologically, "nanocomposite" is not a new word. However, it is currently a very exciting word for many researchers. Just like genome research. The recent development of nano-porous, nano-composites by researchers at Ohio State University adds a new dimension to heat resistant plastics.
Composites are fabricated in a variety of processes. However, pultrusion process is favoured when high volume production of composite materials is demanded. Its ability to produce constant cross-section of proﬁles with little waste materials makes pultrusion one of the most cost-effective processes. For equivalent strength, pultruded ﬁnished products can be 50% lighter than aluminum and 80% lighter than steel. This is only part of the story.
Decades ago, Charles Macintosh embedded two layers of cotton fabric in natural rubber to make a raincoat. Not only he made a good raincoat, he opened-up future for fibre composites (FCs). Since FCs are made from layers of fabric glued together with resins, resins tend to break apart when stressed. Technically, this is known as delamination. It is possible to avoid delamination by adding extra thickness or by riveting. But these add cost and compromise strength. Resistance to delamination holds the key to a successful application.
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Brown, H. L. and Jones, D. H. 2016, May.
"Insert title of paper here in quotes,"
ANTEC 2016 - Indianapolis, Indiana, USA May 23-25, 2016. [On-line].
Society of Plastics Engineers
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