The design of lightweight neutrons shields has been restricted for quite some time to the use of the epoxy thermosets as the main building blocks. Meanwhile, the recent developments in the field of polymers suggest otherwise. Indeed, benzoxazine resins have taken the lead over the traditional thermosets in many exigent applications. Therefore, in a vision to introduce newer matrices with better performances and to further expand the applications of the benzoxazine resins into the nuclear field, the neutron shielding efficiency along with the thermal and thermomechanical performances of the neat benzoxazine polymer and its subsequent B₄C-reinforced composites were investigated. The neutron shielding measurements were performed using an optimized experimental setup at NUR research reactor, Algiers. The neat benzoxazine polymer displayed almost similar thermal neutrons screening performances than the epoxy with a macroscopic cross-section (Σ) of a 0.724 cm^{− 1} equivalent to a mean free path (λ) of 0.957 cm. The effect of the particle amount was also studied to maximize the shielding ability of the developed materials. For instance, the benzoxazine composite containing 20 wt.% of B₄C displayed the outstanding screening ratio of about 96% for a sample thickness of 13 mm. Finally, the remarkable findings were put into context by providing multifaceted comparisons with the available shielding materials.

长期以来，轻型中子防护罩的设计一直被限制使用环氧树脂热固性材料作为主要构件。同时，聚合物领域的最新发展表明并非如此。事实上，苯并恶嗪树脂在许多紧急应用中领先于传统的热固性树脂。因此，为了引入性能更好的新型基体并进一步扩大苯并恶嗪树脂在核领域的应用，中子屏蔽效率以及纯苯并恶嗪聚合物及其后续 B ₄的热和热机械性能研究了 C 增强复合材料。中子屏蔽测量是在阿尔及尔的 NUR 研究反应堆中使用优化的实验装置进行的。纯苯并恶嗪聚合物显示出与环氧树脂几乎相似的热中子屏蔽性能，其宏观横截面 (Σ) 为 0.724 cm ^{- 1，}相当于平均自由程 (λ) 为 0.957 cm。还研究了粒子量的影响，以最大限度地提高开发材料的屏蔽能力。例如，含有 20 wt.% B ₄ C的苯并恶嗪复合材料对于 13 mm 的样品厚度显示出约 96% 的出色筛选率。最后，通过提供与可用屏蔽材料的多方面比较，将显着的发现置于上下文中。