摘要
采用差示扫描量热仪研究了常规聚酯(PET)、合肥乐凯科技产业有限公司薄膜制造部三个车间不同回收设备生产的再生聚酯PET1,PET2,PET3的非等温结晶性能。结果表明:三者的结晶成核机理是均相和异相成核同时存在,但再生切片的功能母料成分残留较多,其结晶受异相成核影响更大;高降温速率下PET1、PET2和PET3仍有较明显的结晶峰,说明再生切片在高降温速率下仍能结晶;相同结晶速率下,再生切片的结晶速率比常规聚酯的快,说明功能母料成分能够加速聚酯的结晶;相同降温速率下,PET3的结晶峰更为明显,说明PET3中含有的异物成核剂成分较多。同样我们可以获得启示,在光学基膜功能母料的制备中,可以使用含分散良好的纳米级SiO2颗粒用以提升光学基膜的结晶度,从而获得光学性能和热稳定性均优异的光学基膜产品。
The non-isothermal crystallization properties of recycled polyester(PET), produced by different recovery equipment in three workshops of film manufacturing department of Hefei Lekai Technology Industry Co., Ltd were studied by differential scanning calorimeter(DSC). The non-isothermal crystallization properties of recycled polyester PET1,PET2,PET3 were studied by means of differential scanning calorimeter(DSC). The results showed that the nucleation mechanism was homogeneous and heterogeneous nucleation, but there were more residual functional masterbatch components in the regenerated chips, and the crystallization was more affected by heterogeneous nucleation. The crystallization peaks of PET1,PET2 and PET3 were still obvious at the high cooling rate, indicating that the regenerated chips could still crystallize at the high cooling rate, and the regenerated chips could still crystallize at the same crystallization rate. The crystallization rate of PET3 is faster than that of conventional polyester, indicating that the functional masterbatch can accelerate the crystallization of polyester, and at the same cooling rate, the crystallization peak of PET3 is more obvious, indicating that there are more foreign matter nucleating agents in PET3. Similarly, it can be enlightened that in the preparation of functional masterbatch of optical base film, the crystallinity of optical base film can be improved by using well-dispersed nano-sized SiO2 particles. Thus, optical base film products with excellent optical properties and thermal stability were obtained.
作者
刘长丰
程新星
Liu Changfeng;Cheng Xinxing(China Aerospace Science and Technology Group Hefei Lekai Science and Technology Industry Co., Ltd., Hefei 230001, China)
出处
《广东化工》
CAS
2019年第7期99-101,共3页
Guangdong Chemical Industry
关键词
BOPET
再生切片
非等温结晶动力学
non-isothermal crystallization kinetics
BOPET
regenerated chips
