Alvarado Abraham G, Rabelero Martin, Aguilar Jacobo, Flores Mejia Jorge, Moscoso Sánchez Francisco J
Departamento de Ingeniería Mecánica Eléctrica, Centro Universitario de Ciencias Exactas e Ingenierías, Universidad de Guadalajara, Guadalajara, México.
Departamento de Ingeniería Química, Centro Universitario de Ciencias Exactas e Ingenierías, Universidad de Guadalajara, Guadalajara, México.
Des Monomers Polym. 2020 Mar 16;23(1):40-49. doi: 10.1080/15685551.2020.1739506. eCollection 2020.
The synthesis and characterization of copolymers of n-Butyl Acrylate (BA) and Poly(ethylene glycol) dimethacrylate (PEGDMA) were realized by microemulsion. In this synthesis, the relation of PEGDMA 10, 20, 30, 40 and 50% wt with respect to BA was changed. The copolymers obtained were characterized by the determination of conversions (gravimetry), infrared spectroscopy: Fourier transform (FTIR), dynamic light scattering (DLS), thermogravimetry (TGA) and differential scanning calorimetry (DSC). The results confirmed the synthesis of BA-co - PEGDMA copolymers by the identification of characteristic FTIR bands and which determined the glass transition temperature of the copolymers. The conversions were found in the range of 85% to 90%. Within the stability of the produced latex, it was observed that at 10% and 30% wt. of PEGDMA the systems were stable, but when more PEGDMA was added up 40% to 50% wt., the system became unstable. The stability of produced latexes depends on the PEGDMA contents and this must be less than 30% wt.; meanwhile the PEGDMA content greater than 30% wt. leads to unstable latexes, forming clots. Copolymers showed single glass transition temperatures between -53.37°C and -16.58°C, depending on the composition of PEGDMA in the copolymers. Resulting in the different arrangements of units of PEGDMA along in the chain affected the thermal properties of the final copolymers.
通过微乳液实现了丙烯酸正丁酯（BA）与聚乙二醇二甲基丙烯酸酯（PEGDMA）共聚物的合成与表征。在该合成过程中，改变了相对于BA，PEGDMA的含量分别为10%、20%、30%、40%和50%（重量）时的比例关系。通过转化率测定（重量法）、红外光谱：傅里叶变换（FTIR）、动态光散射（DLS）、热重分析（TGA）和差示扫描量热法（DSC）对所得共聚物进行了表征。结果通过FTIR特征谱带的识别证实了BA-co-PEGDMA共聚物的合成，并确定了共聚物的玻璃化转变温度。转化率在85%至90%范围内。在制备的胶乳稳定性方面，观察到当PEGDMA含量为10%和30%（重量）时，体系是稳定的，但当PEGDMA添加量增加到40%至50%（重量）时，体系变得不稳定。制备的胶乳稳定性取决于PEGDMA的含量，其必须小于30%（重量）；同时，PEGDMA含量大于30%（重量）会导致胶乳不稳定，形成凝块。共聚物表现出单一的玻璃化转变温度，介于-53.37°C和-16.58°C之间，这取决于共聚物中PEGDMA的组成。PEGDMA单元在链中的不同排列方式影响了最终共聚物的热性能。
