会议集名/来源：10th International Conference on Photonic Technologies: LANE 2018, Furth, Germany, 3-6 September 2018
Laser sintering of polymers gets more and more importance for small series production. However, available materials do not always fulfil requirements of the intended applications. New developments on the market should close this gap. However, some of these new materials are difficult to process or do not have expected properties. Aim of the presented study was to develop a polybutylene terephthalate material for laser sintering process. Material properties, processing conditions as well as part properties of the different experimental grades are investigated. Fundamental knowledge on the processing of this new material type in laser sintering is established.
Rafael Bassaco;Denys Scheiner;Paulo Massao;Raquel Andrade;Tatiane Senderski
会议集名/来源：67th International Cable and Connectivity Symposium: IWCS 2018, Industry Leadership, Innovation and Professional Development: Providence, Rhode Island, USA, 14-17 October 2018
Optical cables manufactured with loose tube technology have been used for a long time by the data transmission industry. Its robust construction has made possible to install it in various environments, especially in outdoor plants, where performance reliability is required in cold, heat, underground and aerial installations. The construction of the cable is based on the secondary protection given by plastic tube over a bundle of fibers, thus making it possible to develop cables within the most varied range of fibers, ensuring great robustness against traction and compression. This paper introduces a PBT (Polybutylene Terephthalate) dry buffer tubes cables, a dry tubes made with the well-known material used for year as standard for jelly filled buffer tube as alternative to PP (Polypropylene), and establish a comparison between two totally dry optical cables with the same design, where only the raw material of the dry buffer tube changes (from PP to PBT), to show their similarities and differences. The LEEE 1222-2011 standard - Testing and Performance for All-Dielectric Self-Supporting (ADSS) Fiber Optic Cable for Use on Electric Utility Power Lines  was used as reference for the evaluation of these cables.
Ales Mizera;Miroslav Manas;David Manas;Zdenek Holik;Michal Stanek;Jan Navratil;Martin Bednarik
会议集名/来源：Abstracts of the 2014 International Conference on Advanced Materials, Structures and Mechanical Engineering
Radiation processing of polymers is a wellestablished and economical commercial method of precisely modifying the properties of polymers. The industrial applications of the radiation processing of plastics and composites include polymerization, crosslinking, degradation and grafting. Radiation processing mainly involves the use of either electron beams from electron accelerators or gamma radiation from Cobalt-60 sources. The PBT Polybutylene terephthalate was used in this research and the tensile behaviour was investigated at the ambient temperature. Results demonstrate that PBT has higher values of tensile strength and E-modulus with the increased irradiation dose and it has decreased elongation at break. This behaviour leads to the expansion of these materials in the automotive and electrical industry.
会议集名/来源：International Conference on Recent Advances in Materials and Manufacturing Technologies: IMMT 2017 : Dubai, UAE, 28-29 November 2017
Polybutylene Terephthalate (PBT) is a synthetic thermoplastic polymer with fast crystallization rate; and is extensively used in many automobile applications where it is prone to continuous wear.Carbon Nanotubes (CNTs) as reinforcements are most ideal and promising reinforcement in enhancing mechanical properties of polymers.Owing to strong van der Waals' interaction between the nanotubes; they tend to aggregate.To overcome this behavior, CNTs are generally functionalized in acid solutions to help stabilize the dispersion and allow interaction with polymer matrix.Thus, the present study focuses on the effect of reinforcing microwave-functionalized CNTs on the mechanical and tribological properties of PBT polymer matrix.The homogenous dispersion of CNTs in PBT matrix was successfully achieved by functionalizing the CNTs.DSC and XRD analysis confirms better crystalhzation and reduced crystallite size due to improved nucleation.Apart; an increase in the hardness and MFI value was also noted, which again hinted towards improved dispersion.However, the reduction in tensile strength and % elongation indicated embrittlement of the PBT matrix after addition of functionalized CNTs.Furthermore, the peeling and scuffing phenomenon observed for virgin PBT, during sliding wear, was suppressed after CNT addition.