一种可降解PBAT复合材料相容剂的合成及应用

Synthesis and application of a biodegradable PBAT composite compatibilizer

以扩链剂ADR4370S和硅烷偶联剂KH550为原料,合成了一种含硅相容剂K-ADR,将其应用于滑石粉增强聚己二酸对苯二甲酸丁二酯(PBAT)中,通过转矩流变仪制备了PBAT复合材料。采用FTIR、^(1)HNMR、TG对K-ADR进行了表征,对PBAT复合材料的流变性能、力学性能、冲击断面微观形貌和元素分布进行了测试。结果表明,当K-ADR的加入量为PBAT和滑石粉质量的0.6%时,PBAT复合材料的拉伸强度、冲击强度和弯曲模量分别为19.11 MPa、67.68 kJ/m^(2)和378.36 MPa,比纯PBAT滑石粉体系分别提高了20.9%、9.9%和58.0%。PBAT复合材料薄膜的水蒸气透过系数为5.70×10^(-12)g·cm/(cm^(2)·s·Pa),氧气透过系数为3.17×10^(-13)cm^(3)·cm/(cm^(2)·s·Pa),分别约为PBAT薄膜的2.1%和1.0%。

A silicon-containing compatilizer(K-ADR)was synthesized from chain extender ADR4370S and silane coupling agent KH550 and then applied in talcum powder reinforced poly(butylene adipate/terephthalate)(PBAT).PBAT composite was prepared by torque rheometer.K-ADR was characterized by FTIR,^(1)HNMR and TG.The rheological properties,mechanical properties,microstructure of impact section and element distribution of the composites were tested.The results showed that when the amount of K-ADR was 0.6% of the mass of PBAT and talcum powder,the tensile strength,impact strength and bending modulus of the prepared PBAT composite were 19.11 MPa,67.68 kJ/m^(2) and 378.36 MPa,which were 20.9%,9.9% and 58.0% higher than those of pure PBAT talcum powder system,respectively.The water vapor transmittance coefficient and oxygen transmittance coefficient of the composite PBAT film were 5.70×10^(-12)g·cm/(cm^(2)·s·Pa)and 3.17×10^(-13)cm^(3)·cm/(cm^(2)·s·Pa),which were about 2.1% and 1.0% of those of pure PBAT film,respectively.