高分子材料长期暴露在外界环境中，在光与热的作用下链段容易发生降解，影响材料的机械性能和化学稳定性，从而降低了材料的使用寿命同时也限制其应用的广泛性。基于此，本文首先对制备得的荧光粉的光学性能进行优化，在此基础上，将荧光粉作为无机填料和稳定剂分别掺杂进光固化树脂与PVC中得到对应的高分子荧光材料，从而提高高分子材料机械性能与稳定性，并延长其使用寿命。本论文选用稀土荧光粉为研究基体，用其代替传统的无机填料，将不同含量的荧光粉掺杂进光固化树脂与PVC中分别通过SLA-3D打印与热加工的方式得到系列荧光树脂和PVC荧光管，深入研究其机械性能与稳定性。

首先利用共沉淀法制备LaP₃O₉:Eu^{3 +}，改变Eu^{3 +}的掺杂量，对比添加CDPVA前后以及改变荧光粉煅烧温度，通过荧光光谱分析、XRD、FT-IR、紫外光谱以及SEM表征，对所制备得的荧光粉性能进行系统分析发现：控制Eu^{3 +}的添加量能提高荧光粉的发光性能；通过控制煅烧温度使得晶粒细化并均匀化分布在基体中也能有效提高荧光粉发光性能；加入CDPVA后的荧光粉，会发生5D₀→7F₁（橙光）磁偶极子的跃迁，且位于680 nm处5D₀→7F₂（红光）下对应峰的吸收强度升高，可见CDPVA的加入能提高荧光粉的发光性能。

将制备得的荧光粉以不同含量掺杂入光固化树脂体系中，经SLA-3D打印固化成型得到荧光树脂。荧光粉作为纳米颗粒，与光敏树脂体系形成交联结构，当材料受到外力作用时，应力通过交联点进行分散，使得材料机械强度得到提高；荧光粉对紫外线的吸收作用，抵抗了一部分紫外线对材料内部的破坏从而提高材料稳定性和寿命。当荧光粉添加量为3%时荧光树脂拉伸强度达到最大为42.43 MPa，材料冲击强度达到11.37 kJ/m²，硬度达到峰值90 HD，受光照后断裂伸长率变化量最低为1.01%，光照前后材料硬度变化量最小为2 HD，荧光粉添加量为3%时，荧光树脂各项性能达到最优。

将制备得的荧光粉按照不同比例作为光稳定剂和填料加入PVC中，通过热加工得到PVC荧光管。添加荧光粉后，PVC原料的热稳定性有了明显提高，PVC荧光管的力学性能与稳定性能也有明显改善；当荧光粉添加量达到3%时，断裂伸长率达到最高为156%，同时维卡值最高达到了83.6℃，拉伸强度达到峰值52.1 MPa；添加3%含量荧光粉的PVC荧光管室经过3个月的光照后，其室内外断裂伸长率变化值达到最低为13%，与未添加荧光粉的PVC管相比，维卡值高了4.1℃，同时拉伸强度对应提高了8.2 MPa。

Polymer materials exposed to the external environment for a long time, under the action of light and heat, the chain segment is easy to degrade, which affects the mechanical properties and chemical stability of the material, thus reducing the service life of the material and limiting its application. Based on this, this paper firstly optimized the optical properties of the phosphors prepared. On this basis, the phosphors were doped into the photocurable resin and PVC as inorganic filler and stabilizer respectively to obtain the corresponding polymer fluorescent material, so as to improve the mechanical properties and stability of the polymer material, and extend its service life. In this paper, rare earth phosphors are selected as the research matrix, which replaces the traditional inorganic filler, and different contents of phosphors are doped into the photocurable resin and PVC to obtain a series of fluorescent resins and PVC fluorescent tubes through SLA-3D printing and thermal processing respectively, so as to further study their mechanical properties and stability.

Firstly, LaP₃O₉:Eu³⁺ was prepared by co-precipitation method, the doping amount of Eu³⁺ was changed, and the calcination temperature of phosphor powder was compared before and after adding CDPVA.The properties of the obtained phosphors were systematically analyzed and it was found that: Controlling the addition amount of Eu³⁺ can improve the luminescent properties of the phosphors; Controlling the calcination temperature to refine the grains and uniformly distribute them in the matrix can also effectively improve the luminescent properties of the phosphors; Adding the phosphor powder after CDPVA will undergo the transition of 5D₀→7F₁ (orange light) magnetic dipole, and the absorption intensity of the corresponding peak under 5D₀→7F₁ (red light) at 680 nm will increase. It can be seen that the addition of CDPVA can improve the fluorescence. The luminous properties of the powder.

The prepared phosphors were doped into the photocurable resin system with different contents, and the fluorescent resin was obtained by curing and molding by SLA-3D printing. As nanoparticles, phosphor powder forms a cross-linked structure with the photosensitive resin system. When the material is subjected to external force, the stress is dispersed through the cross-linking points, so that the mechanical strength of the material is improved; Destruction within the material thus increases material stability and longevity. When the amount of phosphor added is 3%, the tensile strength of the fluorescent resin reaches a maximum of 42.43 MPa, the impact strength of the material reaches 11.37 kJ/m², and the hardness reaches a peak value of 90 HD. The minimum change in hardness of the front and rear materials is 2 HD, and when the amount of phosphor added is 3%, the properties of the fluorescent resin are optimal.

The prepared fluorescent powder is added into PVC as a light stabilizer and a filler according to different proportions, and a PVC fluorescent tube is obtained by thermal processing. After adding phosphor, the thermal stability of PVC raw materials has been significantly improved, and the mechanical properties and stability of PVC fluorescent tubes have also been significantly improved; when the amount of phosphor added reaches 3%, the elongation at break reaches a maximum of 156%, and at the same time the highest Vicat value reached 83.6℃, and the tensile strength reached a peak value of 52.1 MPa; after 3 months of illumination in the PVC fluorescent tube chamber with 3% phosphor content, the change in indoor and outdoor elongation at break reached the lowest 13% , compared with the PVC pipe without phosphor powder, the Vicat value is 4.1℃ higher, and the tensile strength is correspondingly increased by 8.2 MPa.

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