高韧性PGA/TPEE共混物的制备及性能  被引量:2

Preparation and properties of PGA/TPEE blends with enhanced toughness

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作  者:王梓冲 吴亮 朱丽莎 徐鼐[1] 庞素娟[2] 潘莉莎[3] WANG Zichong;WU Liang;ZHU Lisha;XU Nai;PANG Sujuan;PAN Lisha(School of Materials Science and Engineering,Hainan University,Haikou 570228,China;Hainan Provincial Fine Chemical Engineering Research Center,Hainan University,Haikou 570228,China;School of Chemistry and Chemical Engineering,Hainan University,Haikou 570228,China)

机构地区:[1]海南大学材料科学与工程学院,海口570228 [2]海南大学海南省精细化工工程技术研究中心,海口570228 [3]海南大学化学化工学院,海口570228

出  处:《工程塑料应用》2024年第5期35-42,共8页Engineering Plastics Application

基  金:海南省财政科技计划资助项目(ZDYF2022GXJS002)。

摘  要:聚乙醇酸(PGA)具有高强度、高模量、良好的阻隔性能和生物相容性等优点,而针对其韧性差、加工成型稳定性不佳等问题进行改性,能进一步增强PGA材料的应用潜力。为此,将热塑性聚酯弹性体(TPEE)、多元环氧扩链剂(ADR)和PGA进行熔融共混,制备得到PGA/TPEE/ADR共混材料。其中,TPEE作为增韧组分,而ADR则作为反应性相容剂和扩链剂使用。通过转矩流变仪、熔体流动速率(MFR)仪、旋转流变仪、扫描电子显微镜、电子万能试验机、差示扫描量热仪、广角X射线衍射仪研究ADR的加入对PGA/TPEE(75/25)共混物的流变行为、微观结构、力学性能以及结晶性能等方面的影响。研究结果表明,随着ADR的加入,PGA/TPEE/ADR共混物的黏度和熔体强度上升、加工成型稳定性得到较大改善。当ADR添加量增大至0.9份时,PGA/TPEE/ADR(75/25/0.9)共混物的MFR值由PGA/TPEE(75/25)共混物的32.5 g/10 min降低至13.2 g/10 min。此外,ADR作为反应性相容剂,可明显改善PGA/TPEE界面相容性,共混物的韧性得到显著提升。PGA/TPEE/ADR(75/25/0.9)共混物的断裂伸长率和缺口冲击强度可由PGA/TPEE(75/25)共混物的54.6%和4.5 kJ/m^(2)分别增大至329.3%和16.1 kJ/m^(2)。Polyglycolic acid(PGA)has the advantages of high strength,high modulus,excellent barrier performance and biocompatibility.Moreover,its application potential would be further enhanced by improving the toughness and processability of PGA.PGA/thermoplastic polyester elastomer(TPEE)/multiple epoxy extender(ADR)blends were prepared by melt blending method,where TPEE resin was used as toughening component and ADR was used as reactive compatibilizer and chain extender.Influences of ADR addition on rheological behavior,microstructure,mechanical performance and crystallization properties of PGA/TPEE(75/25)blend were studied in detail by using torque rheometer,melt flow rate(MFR)meter,rotary rheometer,scanning electron microscope,electronic universal testing machine,differential scanning calorimeter and wide angle X-ray diffractometer.The results show that the addition of ADR increase the viscosity and melt strength and processability of the PGA/TPEE/ADR blends.While increasing ADR content to 0.9 phr,MFR of PGA/TPEE/ADR(75/25/0.9)blend decreases from 32.5 g/10 min of PGA/TPEE(75/25)blend to 13.2 g/10 min.Meanwhile,used as a reactive compatibilizer,the introduction of ADR obviously enhances the interfacial compatibility and toughness of PGA/TPEE blends.The elongation at break and notched impact strength of PGA/TPEE/ADR(75/25/0.9)blend increase from 54.6%and 4.5 kJ/m^(2)for the PGA/TPEE(75/25)blend to 329.3%and 16.1 kJ/m^(2),respectively.

关 键 词:聚乙醇酸 扩链 增容 流变行为 力学性能 

分 类 号:TQ321[化学工程—合成树脂塑料工业]

 

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