纳米二氧化硅表面改性双嵌段共聚物对PET结晶性能的影响研究

Study of the Effect of Diblock Copolymer Modified Nano-Silica Surface on PET Crystallization

由于PET在工业生产中的结晶速率慢,会造成实际生产中的资源浪费,所以在本实验中通过在SiO_2表面接枝两种不同性质的聚合物聚乙二醇(PEG)和低分子量聚对苯二甲酸乙二醇酯(LMWPET)来对其进行化学改性,通过TEM、FTIR、1H-NMR对其进行了表征,证明了SiO_2-PEG-LMWPET双嵌段共聚物的合成。然后通过DSC对SiO_2-PEG-LMWPET与PET的熔融共聚物进行了测试,证明了双嵌段共聚物在PET结晶过程中的成核效应,即:双嵌段共聚物可以使PET的结晶速度提高。

As the crystallization rate of PET in industrial production is tardiness, and this would cause the waste of resources in actual production. In this experiment, polymer polyethylene glycol （PEG） and low molecular weight poly （LMWPET） were used to modified SiO2. And the SiO： - PEG - LMWPET diblock copolymer was characterized by TEM, FTIR and l H - NMR. The melt copolymer of SiO2 - PEG - LMWPET and PET was also tested by DSC. The nucleation effect of diblock copolymer in the crystallization of PET was confirmed： the double - block copolymer could increase the crystallization speed of PET.