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首页> 外文期刊>Journal of Polymers and the Environment >Environmentally Friendly Oil-Modified Polyesters as Polymeric Plasticizers for Poly(vinyl chloride)
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Environmentally Friendly Oil-Modified Polyesters as Polymeric Plasticizers for Poly(vinyl chloride)

机译：环保型油改性聚酯作为聚氯乙烯的聚合物增塑剂

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摘要

Oil-modified polyesters were synthesized to serve as polymeric plasticizers for PVC. A total of four polymeric plasticizers with different average molecular weights were prepared. Characterizations were done using Fourier-transformed infrared spectroscopy, proton nuclear magnetic resonance spectroscopy, and gel permeation chromatography. Some of the tests conducted on PVC films include thermal stability test using thermogravimetric analyser, determination of glass transition temperature (T-g), plasticizer migration and leaching resistance test, morphology study of plasticized PVC films using field emission scanning microscope, toxicity test, and tensile test. Owing to the plasticizing effect of the palm oil-based compound, T-g of the plasticized PVC has decreased to an average of 65 A degrees C at 20 wt% loading. The polymeric plasticizer is also able to contribute positively to the thermal stability and mechanical properties of the PVC films. Some of the advantages of incorporating polymeric plasticizer with high molecular weight includes lower rate of leaching from plastic, and improved tensile strength and elongation at break. Besides, thermal stability of the plastic studied using Kissinger's and Flynn-Wall-Ozawa's approaches shows that PVC blended with high molecular weight oil-modified polyester is more thermally stable, evidenced by the increase in the activation energy of decomposition, E-d. Toxicity test using brine shrimp egg shows encouraging results, where the oil-based plasticizer is considerably less toxic compared to some of the commercial plasticizers.
机译：合成了油改性的聚酯，用作PVC的聚合物增塑剂。总共制备了四种具有不同平均分子量的聚合物增塑剂。使用傅里叶变换红外光谱，质子核磁共振光谱和凝胶渗透色谱法进行表征。在PVC薄膜上进行的一些测试包括使用热重分析仪的热稳定性测试，玻璃化转变温度（Tg）的测定，增塑剂迁移和耐浸出性测试，使用场发射扫描显微镜对增塑的PVC薄膜进行形态学研究，毒性测试和拉伸测试。由于棕榈油基化合物的增塑作用，增塑PVC的T-g在20 wt％负载下已降至平均65 A摄氏度。聚合增塑剂还能够对PVC薄膜的热稳定性和机械性能做出积极贡献。掺入具有高分子量的聚合物增塑剂的一些优点包括较低的从塑料中浸出的速率，以及改善的拉伸强度和断裂伸长率。此外，使用基辛格方法和Flynn-Wall-Ozawa方法研究的塑料的热稳定性表明，与高分子量油改性聚酯共混的PVC具有更高的热稳定性，这可通过分解活化能E-d的增加来证明。使用盐水虾卵的毒性测试显示出令人鼓舞的结果，与某些商用增塑剂相比，油基增塑剂的毒性低得多。

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