Sustainable Design and Application-Driven Selection of Thermoplastic Elastomers in Modern Rubber Manufacturing
DOI:
https://doi.org/10.64137/31079911/IJMST-V2I1P101Keywords:
Thermoplastic Elastomers (Tpes), Sustainable Rubber Manufacturing, Application-Driven Material Selection, Life Cycle Assessment (Lca), Thermoplastic Vulcanizates (Tpv), Thermoplastic Polyurethanes (Tpu), Styrenic Block Copolymers (Sbc/Tps), Thermoplastic Polyester Elastomers (Tpee), Polyolefin Elastomers (Tpo/Tpe-O), Circular Economy in ElastomersAbstract
The present paper offers a holistic, practice-based model in the choice of thermoplastic elastomers (TPEs) in modern rubber production with a focus on the sustainable design approach. The thermoplastic elastomers consisting of a combination of the elasticity characteristic of traditional vulcanized rubber with the ease with which thermoplastics are processed have become key to decarbonization, recycling, and lightweighting in the automotive, consumer, medical and industrial industries. But to be truly sustainable, it is not only a solution that involves the replacement of materials but a systemic overall approach that involves the sourcing of raw-materials (biobased feedstuff, reclaimed/rubber grinding), compounding and additives (compatibilizers, sustainable fillers), processing (energy and solvent reduction), and end-of-life (reuse, mechanical and chemical recycling, biodegradation when suitable). The paper integrates the latest innovations in TPE chemistry and processing, such as polyolefin TPEs (TPO/TPE-O), thermoplastic vulcanizates (TPV), thermoplastic polyurethanes (TPU), styrenic block copolymers (SBC/TPS), and thermoplastic polyester elastomers (TPEE), and projects them in envelopes in application performance indicators needed by the contemporary rubber products such as dynamic abrasion resistance, compression set, fuel/oil resistance, low-temperature flexibility, and long- The approach is pairing property-process matrices, lifecycle assessment (LCA) heuristics, and selection flowcharts to rank options of material selection by the criticality of use, manufacturing feasibility, environmental indicators (embodied carbon, recyclability, toxicity), and cost. The paper records the representative case studies, e.g., automotive door seals (high weathering, moderate abrasion), soft-touch consumer grips (aesthetics and tactile performance), and reclaimed tire-based TPE composites (circular economy approach) and illustrates how formulation options, e.g. grade of TPU vs TPV, presence of plasticizer, content of nanofiller, compatibility of compatibilizer, etc., compromise performance and sustainability. Quantitative data are given: the range of predicted embodied carbon (kg CO 2 -eq/kg) of major TPE families, approximate thresholds of recycled content with current technology, meeting standard mechanical property requirements, and comparative energy consumptions between extrusion and injection moulding pathways. The paper also reviews additive technologies which reduce environmental impact, bio-based plasticizers, silica and lignin fillers, low-ZnO curing aids, and non-toxic crosslinking strategies and how they impacted processability and long-term performance. Lastly, we also suggest an implementable selection algorithm (flowchart and decision tables) to industry practitioners combining regulatory requirements (e.g., RoHS, REACH), recyclability goals and end-use performance, thereby permitting a traceable, auditory path between the product requirement and material/formulation selection. The framework specifically references and develops literature in the field of rubber additives and sustainability (such as the article Emerging Trends in Rubber Additives for Enhanced Performance and Sustainability by the user), a way to pragmatically implement in manufacturing lines, yet provides insight of research gaps, including standardized eco-metrics of TPE blends, scalable devulcanization routes to reclaimed tire rubber (GGR) integration and long-term field testing of bio-based TPEs. The goal of this contribution is to have both a technical reference to materials engineers and a decision support tool to product designers who may want to re-engineer rubber products that have a lower carbon footprint, and still maintain good performance.
References
[1] G. Holden, Thermoplastic elastomers, In Applied plastics engineering handbook, William Andrew Publishing, pp. 97-113, 2024.
[2] J. E. Mark, B. Erman, and M. Roland, The science and technology of rubber. Amsterdam: Elsevier Academic Press, 2013.
[3] R. P. Babu, K. O’Connor, and R. Seeram, “Current progress on bio-based polymers and their future trends,” Progress in Biomaterials, vol. 2, no. 1, p. 8, 2013, doi: https://doi.org/10.1186/2194-0517-2-8.
[4] P. Parcheta, E. Głowińska, and J. Datta, “Effect of bio-based components on the chemical structure, thermal stability and mechanical properties of green thermoplastic polyurethane elastomers,” European Polymer Journal, vol. 123, p. 109422, Jan. 2020, doi: https://doi.org/10.1016/j.eurpolymj.2019.109422.
[5] H. Nakajima, P. Dijkstra, and K. Loos, “The Recent Developments in Biobased Polymers toward General and Engineering Applications: Polymers that are Upgraded from Biodegradable Polymers, Analogous to Petroleum-Derived Polymers, and Newly Developed,” Polymers, vol. 9, no. 12, p. 523, Oct. 2017, doi: https://doi.org/10.3390/polym9100523.
[6] P. Gallezot, “Conversion of biomass to selected chemical products,” Chem. Soc. Rev., vol. 41, no. 4, pp. 1538–1558, 2012, doi: https://doi.org/10.1039/c1cs15147a.
[7] L. Asaro, M. Gratton, S. Seghar, and N. Aït Hocine, “Recycling of rubber wastes by devulcanization,” Resources, Conservation and Recycling, vol. 133, pp. 250–262, Jun. 2018, doi: https://doi.org/10.1016/j.resconrec.2018.02.016.
[8] M. Capelot, M. M. Unterlass, F. Tournilhac, and L. Leibler, “Catalytic Control of the Vitrimer Glass Transition,” ACS Macro Letters, vol. 1, no. 7, pp. 789–792, Jun. 2012, doi: https://doi.org/10.1021/mz300239f.
[9] J. George, M. S. Sreekala, and S. Thomas, “A review on interface modification and characterization of natural fiber reinforced plastic composites,” Polymer Engineering & Science, vol. 41, no. 9, pp. 1471–1485, Sep. 2001, doi: https://doi.org/10.1002/pen.10846.
[10] P. Jia, H. Xia, K. Tang, and Y. Zhou, “Plasticizers Derived from Biomass Resources: A Short Review,” Polymers, vol. 10, no. 12, p. 1303, Nov. 2018, doi: https://doi.org/10.3390/polym10121303.
[11] Arunima Reghunadhan et al., “Thermoplastic elastomers (TPEs) from rubber-plastic blends,” Advances in Thermoplastic Elastomers, pp. 291–314, Jan. 2024, doi: https://doi.org/10.1016/b978-0-323-91758-2.00008-8.
[12] Y. Lin et al., “Application-Driven High-Thermal-Conductivity Polymer Nanocomposites,” ACS Nano, vol. 18, no. 5, pp. 3851–3870, Jan. 2024, doi: https://doi.org/10.1021/acsnano.3c08467.
[13] Jayadip GhanshyamBhai Tejani, “Thermoplastic Elastomers: Emerging Trends and Applications in Rubber Manufacturing,” Global disclosure of economics and business, vol. 6, no. 2, pp. 133–144, Dec. 2017, doi: https://doi.org/10.18034/gdeb.v6i2.737.
[14] N. R. Legge, “Thermoplastic elastomers, Rubber Chemistry and Technology, vol. 60, no. 3, pp. 83-117, 1987, doi: https://doi.org/10.5254/1.3536141
[15] E. Maréchal, “Creation and Development of Thermoplastic Elastomers, and Their Position among Organic Materials,” Handbook of Condensation Thermoplastic Elastomers, pp. 1–31, May 2005, doi: https://doi.org/10.1002/3527606610.ch1.
[16] N. T. Dintcheva, G. Infurna, M. Baiamonte, and F. D’Anna, “Natural Compounds as Sustainable Additives for Biopolymers,” Polymers, vol. 12, no. 4, p. 732, Mar. 2020, doi: https://doi.org/10.3390/polym12040732.
[17] L. F. Dumée, “Circular Materials and Circular Design—Review on Challenges Towards Sustainable Manufacturing and Recycling,” Circular Economy and Sustainability, vol. 2, Jun. 2021, doi: https://doi.org/10.1007/s43615-021-00085-2.
[18] P. Sahu, J. S. Oh, and A. I. Isayev, “Chapter 21 Recycling and circular economy of thermoplastic elastomers,” Advances in Thermoplastic Elastomers, pp. 529–561, Jan. 2024, doi: https://doi.org/10.1016/b978-0-323-91758-2.00009-x.
[19] Y. Zhang, J. Wang, Y. Xue, and J. Yang, “Impact of environmental regulations on green technological innovative behavior: An empirical study in China,” Journal of Cleaner Production, vol. 188, pp. 763–773, Jul. 2018, doi: https://doi.org/10.1016/j.jclepro.2018.04.013.
[20] Wole Soboyejo, “Mechanical Properties of Engineered Materials,” CRC Press eBooks, Nov. 2002, doi: https://doi.org/10.1201/9780203910399.
[21] A. Pouzada, Selection of thermoplastics, Design and Manufacturing of Plastics Products, UK: William Andrew Publishing, pp. 87-140, 2021.
