可生物降解聚碳酸亚丙酯(PPC)/相容剂/聚丙烯(PP)纺粘非织造布切片性能研究

Performance of Biodegradable Spun-bonded Non-woven Fabric Slices of Poly( propylene carbonate) /Compatibilizer /Polypropylene

采用熔融共混法制备可生物降解聚碳酸亚丙酯(PPC)/相容剂/聚丙烯(PP)纺粘非织造布切片,分别研究相容剂马来酸酐(MAH)、马来酸酐接枝聚丙烯(PP-2)、马来酸酐-苯乙烯接枝聚丙烯(PP-g-(MAH-coSt))对切片性能的影响.当mPPC∶mPP为70∶30时,相容剂MAH、PP-2、PP-g-(MAH-co-St)的最优用量分别为PPC和PP总质量的1%、3%、8%,在最优用量下PPC/相容剂/PP纺粘非织造布切片的拉伸强度分别为20.16、21.27、26.34 MPa,熔体流动速率(MFR)分别为81.6 g/10min、103.6 g/10min、46.4 g/10min,T-5%较不添加相容剂时提高了50.5、10.0、28.0 K,扫描电镜图显示加了相容剂的切片内部结构紧密,相容性较好,30天降解率在3.12%以上.红外和核磁谱图表明相容剂PP-g-(MAH-co-St)的作用机理是其酸酐基团和PPC发生了开环反应,通过化学键作用促进PPC与PP相容.相容剂改善了切片的力学性能、热学性能和降解性能,提高了切片的界面粘附力和相容性,在满足纺粘生产工艺下,切片的综合性能和加工温度范围得到提高,为制备具有良好综合性能的可生物降解纺粘非织造布切片提供了理论数据.

The biodegradable spun-bonded non-woven fabric slices of poly（ propylene carbonate）（ PPC） /compatibilizer /polypropylene（ PP） were prepared by melt blending. Three different compatibilizers were used in this study： maleic anhydride（ MAH）,polypropylene grafted with maleic anhydride（ PP-2） and polypropylene grafted with maleic anhydride and styrene（ PP-g-（ MAH-co-St））,and the effects of these three compatibilizers on the performance of slices were studied. The results shown that the optimal contents of MAH,PP-2 and PP-g-（ MAH-co-St） were 1%,3% and 8%,respectively. When the weight ratio of PPC ∶ PP was70∶ 30,the tensile strengths of slices were 20. 16,21. 37 and 26. 34 MPa,MFRs were 81. 6 g /10min,103. 6 g /10min and 46. 4 g /10min,T- 5%increased by 50. 5 K,10. 0 K and 28. 0 K with the optimal contents of MAH,PP-2 and PP-g-（ MAH-co-St） respectively. SEM analysis results shown that the slices with compatibilizers became smoother,had less depressions and cavities,the 30 days degradation rate of slices with the compatibilizers were more than 3. 12%. Ring-opening reactions between the anhydride functional groups of PPg-（ MAH-co-St） and PPC were showed by FTIR and1H-NMR spectra,so the compatibility and comprehensive performance of the slices were improved. The mechanical,thermal,morphological and degradable properties can be impoved by adding the compatibilizers.