应用化学 ›› 2025, Vol. 42 ›› Issue (12): 1629-1635.DOI: 10.19894/j.issn.1000-0518.250265

• 研究论文 • 上一篇    下一篇

聚(L-丙交酯-对二氧环己酮)的合成与性能

代书铭1, 李佳岳1, 程煜2, 张坤玉2, 马哲1, 赵梓贺2(), 王彬1   

  1. 1.天津大学材料与工程学院,天津 300350
    2.中国石油天然气股份有限公司石油化工研究院,北京 102206
  • 收稿日期:2025-07-01 接受日期:2025-09-09 出版日期:2025-12-01 发布日期:2025-12-30
  • 通讯作者: 赵梓贺

Preparation and Properties of Poly(L-lactide-p-dioxocyclohexanone)

Shu-Ming DAI1, Jia-Yue LI1, Yu CHENG2, Kun-Yu ZHANG2, Zhe MA1, Zi-He ZHAO2(), Bin WANG1   

  1. 1.School of Materials Science and Engineering,Tianjin University,Tianjin 300350,China
    2.Advanced Materials Research Center,Petrochemical Research Institute,Petro China Company Limited,Beijing 102206,China
  • Received:2025-07-01 Accepted:2025-09-09 Published:2025-12-01 Online:2025-12-30
  • Contact: Zi-He ZHAO

摘要:

以多核β-酮亚胺锌配合物作为催化剂,催化左旋丙交酯(L-LA)和对二氧环己酮(PDO)开环共聚合成一系列不同比例组成的聚合物P(L-LA-co-PDO),并对聚合物的热性能和力学性能进行了研究。 结果表明,多核β-酮亚胺锌配合物的催化活性优于商业辛酸亚锡,所得聚合物的最高相对分子质量达200×103以上,相对分子质量分布在1.4~1.7之间。 在共聚过程中,L-LA表现出高于PDO的反应活性,不同比例PDO单元的引入对聚合物的热性能及力学性能影响显著。 增加聚合物中PDO的含量,聚合物发生由结晶态到无定形态的转变,同时其韧性也大幅度提升,相较于聚左旋乳酸(PLLA)材料,断裂伸长率最大提高704%。 有望通过这种化学共聚方式改性PLLA,拓宽聚乳酸材料的应用范围。

关键词: 聚乳酸, 对二氧环己酮, 多核β-酮亚胺锌金属配合物, 开环共聚, 增韧

Abstract:

A multinuclear β-ketoimine zinc metal complex was used as a catalyst to catalyze the ring-opening copolymerization of levulinic acid ester (L-LA) and p-dioxocyclohexanone (PDO) into a series of polymers P(L-LA-co-PDO) with different ratios of compositions, and the thermal and mechanical properties of the polymers were investigated. The results showed that the polynuclear β-ketoimine zinc complex catalyst exhibited better catalytic activity than commercial stannous octoate. The relative molecular mass of the polymer obtained was above 200×103 and the relative molecular mass distribution was between 1.4 and 1.7. L-LA exhibited higher reactivity than PDO during copolymerization. The introduction of PDO units with different contents had a significant effect on the thermal and mechanical properties of the polymers. With the increase of PDO content, the polymer changed from crystalline state to amorphous state, and its toughness was greatly improved. Compared with traditional PLLA materials, the elongation at break was increased by 704%. This kind of chemical copolymerization is expected to broaden the application range of PLLA materials.

Key words: Polylactide, Dioxanone, β-Ketoimide zinc complexes, Ring-opening copolymerization, Toughening

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