Title: Cure Characterization of Dicyclopentadiene-Based Frontal Polymerization Resin

Authors: Kira Blumhagen, Tori Roadifer, Robert Tuttle, Mark Peyron

DOI: 10.33599/nasampe/s.25.0182

Abstract: Frontal polymerization allows for flexible, out-of-autoclave processing with very rapid curing. In this project, advanced characterization techniques were applied to a dicyclopentadiene-based (DCPD) thermoset resin to develop an understanding of the cure kinetics and the thermomechanical and relaxation behaviors of a frontal ring opening metathesis polymerization (FROMP) system. Isoconversional analysis (ICA) was applied to non-isothermal differential scanning calorimetry (DSC) cure data to establish the activation energy trends in the FROMP reaction. As the curing reaction proceeds, the activation energy increased steadily, then rose significantly at conversions above 80%. These insights were contextualized with rheology, dynamic mechanical analysis (DMA), and dielectric analysis (DEA) to gain insights into thermomechanical and key relaxation behavior in this system. In addition to an observed glass transition, the resin exhibits significant alpha and beta transitions that affect curing, a hypothesized devitrification, and thermomechanical property development. The present study explores the relationship between cure rate and thermomechanical behavior to improve the understanding and control of cured parts using DCPD-based resins.

References: [1] [2] [3] [4] [5] [6] Prepreg - an overview | ScienceDirect Topics n.d. https://www.sciencedirect.com/topics/materials-science/prepreg (accessed January 3, 2025). Nilakantan G, Nutt S. Reuse and upcycling of thermoset prepreg scrap: Case study with out-of-autoclave carbon fiber/epoxy prepreg. Journal of Composite Materials 2018;52:34160. https://doi.org/10.1177/0021998317707253. Smith AW, Hubert P. A novel recycling framework for transforming uncured aerospace prepreg offcuts into a strand-based compression moulding compound with adjustable flowcompaction and curing behaviours. Composites Part A: Applied Science and Manufacturing 2023;175:107790. https://doi.org/10.1016/j.compositesa.2023.107790. Kravchenko SG, Sommer DE, Denos BR, Favaloro AJ, Tow CM, Avery WB, et al. Tensile properties of a stochastic prepreg platelet molded composite. Composites Part A: Applied Science and Manufacturing 2019;124:105507. https://doi.org/10.1016/j.compositesa.2019.105507. Nicoletto G, Riva E, Stocchi A. Mechanical Characterization of Advanced Random Discontinuous Carbon/Epoxy Composites. Materials Today: Proceedings 2016;3:1079–84. https://doi.org/10.1016/j.matpr.2016.03.052. Larson R, Jamora VC, Sattar S, Kravchenko SG, Kravchenko OG. Role of discontinuous fiber core material on the mechanical behavior of hybrid sandwich polyester composites. Journal of Reinforced Plastics and Composites 2023;42:1022–38. https://doi.org/10.1177/07316844221145559. [7] Bianchi I, Forcellese A, Marconi M, Simoncini M, Vita A, Castorani V. Environmental impact assessment of zero waste approach for carbon fiber prepreg scraps. Sustainable Materials and Technologies 2021;29:e00308. https://doi.org/10.1016/j.susmat.2021.e00308. [8] [9] Nakagawa T, Ko S, Houser G, Yang J, Salviato M. Repurposed Discontinuous Fiber Composites for industrial applications: Effects of average number of platelets through the thickness, platelet length, and hybridization on flexure properties. Composites Part A: Applied Science and Manufacturing 2024;180:108046. https://doi.org/10.1016/j.compositesa.2024.108046. Taketa I, Matsutani H. Effect of fiber length on the tensile strength of unidirectionally arrayed chopped strands. Advanced Composite Materials 2020;29:43–54. https://doi.org/10.1080/09243046.2019.1650321. [10] Saquib MN, Larson R, Sattar S, Li J, Kravchenko S, Kravchenko O. Experimental Validation of Reconstructed Microstructure via Deep Learning in Discontinuous Fiber Platelet Composite. Journal of Applied Mechanics 2023:1–61. https://doi.org/10.1115/1.4063983. [11] Larson RA, Nazmus Saquib M, Li J, Favaloro AJ, Sommer DE, Denos BR, et al. The use of digital thread for reconstruction of local fiber orientation in a compression molded pin bracket via deep learning. Composites Part A: Applied Science and Manufacturing 2024;187:108491. https://doi.org/10.1016/j.compositesa.2024.108491. [12] Saquib MN, Sattar S, Larson R, Li J, Kravchenko SG, Kravchenko OG. RECONSTRUCTION OF FULL FIBER ORIENTATION DISTRIBUTION IN MOLDED COMPOSITES USING DEEP LEARNING, Novi, MI: 2022. [13] Li J, Kravchenko O, Larson R, Kravchenko S, Saquib M. Reconstruction of Internal Morphology in Molded Platelet Composite Using Residual Stresses and Deep Convolutional Neural Network. CAMX 2024, NA SAMPE; 2024. https://doi.org/10.33599/nasampe/c.24.0282. [14] Favaloro A, Denos B, Sommer D, Li J, Saquib M, Kravchenko O, et al. DEEP LEARNING AND THERMAL STRAIN VISION FOR RECONSTRUCTION OF FIBER ORIENTATION DISTRIBUTION IN GEOMETRICALLY COMPLEX MOLDED COMPOSITE PARTS. SAMPE 2023, NA SAMPE; 2023. https://doi.org/10.33599/nasampe/s.23.0197. [15] Larson R, Hoque R, Jamora V, Li J, Kravchenko SG, Kravchenko OG. Recognition of local fiber orientation state in prepreg platelet molded composites via deep learning. Engineering Applications of Artificial Intelligence 2024;133:108602. https://doi.org/10.1016/j.engappai.2024.108602. [16] Kravchenko SG, Sommer DE, Denos BR, Avery WB, Pipes RB. Structure-property relationship for a prepreg platelet molded composite with engineered meso-morphology. Composite Structures 2019;210:430–45. https://doi.org/10.1016/j.compstruct.2018.11.058. [17] Standard Test Method for Tensile Properties of Polymer Matrix Composite Materials n.d. https://www.astm.org/d3039_d3039m-08.html (accessed November 1, 2023). [18] Sattar S, Beltran Laredo B, Pedrazzoli D, Zhang M, Kravchenko SG, Kravchenko OG. Mechanical behavior of long discontinuous glass fiber nylon composite produced by in-situ polymerization. Composites Part A: Applied Science and Manufacturing 2022;154:106779. https://doi.org/10.1016/j.compositesa.2021.106779. [19] Saquib MN, Chaparro-Chavez E, Morris C, Çelebi K, Pedrazzoli D, Zhang M, et al. Restoration of Strength in Polyamide Woven Glass Fiber Organosheets by Hot Pressing: Case Study of Impact and Compression after Impact. Polymers 2024;16:2223. https://doi.org/10.3390/polym16152223. [20] Sattar S, Bhagatji JD, Nazmus Saquib M, Pedrazzoli D, Zhang M, Kravchenko SG, et al. Influence of Flow-Induced Polymorphism and Fiber Morphology on Mechanical Behavior in Long Discontinuous Glass Fiber Polyamide Composites. Composites Part A: Applied Science and Manufacturing 2024;185:108353. https://doi.org/10.1016/j.compositesa.2024.108353.

Conference: SAMPE 2025

Publication Date: 2025/05/19

SKU: TP25-0000000182

Pages: 12

Price: $24.00