膜级钛系聚酯与锑系聚酯的成膜性能比较  

Comparison of film forming properties between film-grade titanium-containing polyester and antimony-containing polyester

作　　者：李红芳 王玉合 王树霞 王坤 LI Hongfang;WANG Yuhe;WANG Shuxia;WANG Kun(Research Institute of SINOPEC Yizheng Chemical Fiber Co.,Ltd.,Yizheng 211900)

机构地区：[1]中国石化仪征化纤有限责任公司研究院,江苏仪征211900

出　　处：《合成纤维工业》2020年第2期14-18,共5页China Synthetic Fiber Industry

基　　金：中国石化股份公司科研开发项目(G3070-2015-15-ZJK01-08)。

摘　　要：利用流延膜挤出机、拉膜机分别对锑(Sb)系聚酯和钛(Ti)系聚酯进行挤出、拉伸成膜,考察了两种聚酯的成膜性能,对两种聚酯在加工过程中的热稳定性以及薄膜的热性能、力学性能、光学性能、取向结构进行了表征。结果表明:在挤出、拉伸过程中,Ti系聚酯的黏度降高于Sb系聚酯,Ti系聚酯切片的结晶度明显小于Sb系聚酯,但Ti系聚酯薄膜的结晶度与Sb系聚酯薄膜相当;在相同的成膜工艺下,Ti系聚酯薄膜的弹性模量、光学性能与Sb系聚酯薄膜相当,拉伸强度高于Sb系聚酯薄膜,断裂伸长率低于Sb系聚酯薄膜,双折射率大于Sb系聚酯薄膜。Antimony(Sb)-containing polyester and titanium(Ti)-containing polyester were separately extruded and drawn into films on a casting film extruder and film drawing machine. The film forming properties of these two kinds of polyesters were investigated. The thermal stability of these two polyesters during the production and the thermal property, mechanical properties, optical properties and orientation structure of the prepared films were characterized. The results showed that Ti-containing polyester exhibited higher visocosity drop during extrusion and drawing processes and profoundly lower crystallinity as compared with Sb-containing polyester, but Ti-containing polyester film had the crystallinity equal to Sb-containing polyester film;and as compared with Sb-containing polyester film, Ti-containing polyester film had equal elastic modulus and optical properties, higher tensile strength, lower elongation at break and higher birefringence under the same film preparation process.

关 键 词：聚酯 双向拉伸薄膜 钛系催化剂 锑系催化剂 成膜性能 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]