The co‑carbonization of refined coal tar pitch (RCTP) and brominated industrial methyl naphthalene (BIMNP) employing benzoyl chloride (BC) as a catalyst has been explored to create an isotropic spinnable pitch for carbon fibers with notable tensile strength. BIMNP is derived from industrial methyl naphthalene (IMNP) via photo-bromination assisted by visible light using N-bromosuccinimide (NBS) as a brominating agent. This research investigates the impact of the mass ratio of RCTP and BIMNP on the composition, molecular structure, and thermophysical characteristics of the co‑carbonized pitch. A tentative elucidation of the co‑carbonization mechanism involving RCTP, BIMNP, and BC is presented. Adjusting the NBS-to-IMNP mass ratio leads to the complete conversion of 1-methylnaphthalene (1-MNP) and 2-methylnaphthalene (2-MNP) in IMNP into 1-bromomethylnaphthalene (1-BMNP) and 2-bromomethylnaphthalene (2-BMNP), respectively. The co‑carbonized pitch exhibits enhanced pitch production, increased thermal stability, and improved spinnability compared to pitch synthesized via thermal polycondensation. The resulting carbon fibers experience a rise in tensile strength by 947 MPa and an increase in Young's modulus by 41.3 GPa as BIMNP content varies from 10% to 30%. Using BIMNP as a co‑carbonization agent offers a promising avenue for producing pitch-based carbon fibers meeting automotive industry requirements.

中文翻译：

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煤焦油沥青和溴化工业甲基萘的共碳化用于生产具有增强拉伸强度的各向同性沥青基碳纤维

人们探索了采用苯甲酰氯（BC）作为催化剂的精炼煤焦油沥青（RCTP）和溴化工业甲基萘（BIMNP）的共碳化，以产生具有显着拉伸强度的各向同性可纺碳纤维沥青。BIMNP是以工业甲基萘（IMNP）为原料，使用N-溴代琥珀酰亚胺（NBS）作为溴化剂，在可见光辅助下进行光溴化而得。本研究探讨了RCTP和BIMNP的质量比对共碳化沥青的组成、分子结构和热物理特性的影响。初步阐明了涉及 RCTP、BIMNP 和 BC 的共碳化机制。调整NBS与IMNP的质量比可以使IMNP中的1-甲基萘(1-MNP)和2-甲基萘(2-MNP)完全转化为1-溴甲基萘(1-BMNP)和2-溴甲基萘(2- BMNP），分别。与通过热缩聚合成的沥青相比，共碳化沥青具有更高的沥青产量、更高的热稳定性和更好的可纺性。当 BIMNP 含量从 10% 到 30% 变化时，所得碳纤维的拉伸强度提高了 947 MPa，杨氏模量提高了 41.3 GPa。使用 BIMNP 作为共碳化剂为生产满足汽车行业要求的沥青基碳纤维提供了一条有前途的途径。