A series of semi-aromatic polyesters named as Poly(PO-CHO-PA) were facilely synthesized via ring-opening terpolymerization of bio-based cyclohexane oxide (CHO)/propylene oxide (PO)/phthalic anhydride (PA) using economical U1/PPNCl as dual catalyst. The proportion of CHO-PA and PO-PA segments in polymer can be readily altered by changing the feed ratio of CHO/PO because the reactivity ratios of CHO and PO with PA calculated by Fineman-Ross method are comparable. All synthesized amorphous polyesters with various compositions show one T_g ranging from 62 °C to 133 °C. Significantly, the mechanical, thermal and barrier properties of these amorphous semi-aromatic polyesters are also adjustable and investigated for the first time. The results indicate the semi-polyesters exhibit superior thermostability (T_5% ranging from 306 °C to 323 °C) and high tensile strength (40.21–55.7 MPa) that is comparable with polystyrene (PS). Furthermore, Poly(PO-CHO-PA) films possess a promising prospect as packaging materials because of its colorless and highly transparent nature, along with low oxygen and water vapor transmission rate. All above performances may guarantee its potential alternative to commercial PS.

通过使用经济的U1 /通过生物基环己烷氧化物（CHO）/环氧丙烷（PO）/邻苯二甲酸酐（PA）的开环三元聚合，轻松合成了一系列名为Poly（PO-CHO-PA）的半芳族聚酯。PPNCl作为双重催化剂。通过改变CHO / PO的进料比，可以很容易地改变聚合物中CHO-PA和PO-PA链段的比例，因为用Fineman-Ross方法计算出的CHO和PO与PA的反应率相当。具有各种组成的所有合成无定形聚酯均显示出1 T _g温度范围为62°C至133°C。重要的是，这些无定形半芳族聚酯的机械，热和阻隔性能也是可调节的，并且是首次研究。结果表明，半聚酯具有优异的热稳定性（T _5％，范围306°C至323°C）和高拉伸强度（40.21-55.7 MPa），与聚苯乙烯（PS）相当。此外，聚（PO-CHO-PA）薄膜由于其无色，高度透明的特性以及低的氧气和水蒸气透过率而具有广阔的包装材料前景。以上所有性能均可以保证其有可能替代商用PS。