文章摘要
相容剂增容聚对苯二甲酸乙二醇酯/聚乳酸共混物的制备及结晶性能与热性能
Preparation and Characterization of Crystallization and Thermal Property of Poly(ethylene terephthalate)and Poly(lactic acid) Blends Promoted by Compatilizer
  
DOI:10.16865/j.cnki.1000-7555.2018.03.013
中文关键词: 共混物  相容剂  断面形貌  结晶形态  热性能
英文关键词: blend  compatilizer  phase morphology  crystal morphology  thermal property
基金项目:福建省教育厅资助项目(JAT160516);福建省科技厅项目(2016H0031)
作者单位
邱丽清,刘杭忠,赵升云,刘瑞来 武夷学院生态与资源工程学院 福建省生态产业绿色技术重点实验室 福建省竹材工程技术研究中心,福建 武夷山 354300 
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中文摘要:
      分别通过扫描电镜(SEM)、差式扫描量热分析(DSC)、X射线衍射(XRD)、热重分析(TG)、核磁共振及红外光谱等研究相容剂种类、含量及聚对苯二甲酸乙二醇酯(PET)/聚乳酸(PLA)配比对PET/PLA 共混物的断面形貌、结晶形态及热性能等的影响。SEM 和DSC结果表明,相容剂乳酸/丁二醇共聚物(PLLA-g-BDO)及用量对PET/PLA 共混物的界面相容影响较大。与未加相容剂比,相容剂使界面从清晰过渡到模糊,界面处未见明显团聚颗粒;相容剂用量为8%时,DSC曲线上仅出现1个熔融峰。DSC和XRD表明,相容剂的引入降低了共混物的结晶度,冷结晶和热结晶过程中分别结晶,结晶的温度范围较宽,热结晶的结晶度大于冷结晶。冷结晶时,柔性链的PLA 先结晶,PET后结晶;热结晶时,结晶温度较大组分PET先结晶,PLA后结晶。TG分析表明PET/PLA配比是材料热稳定性的必要条件。
英文摘要:
      Crystal and phase morphology, thermal properties of poly(ethylene terephthalate) and poly(lactic acid) blends with reactive compatilizer types, contents and different ratio for PET/PLA were investigated by SEM, DSC, XRD, TG, 1H-NMR and FT-IR etc. Results of SEM and DSC show that (PLLA-g-BDO) compatilizer types and contents have better influences on the interface compatibility of PET/PLA blends. With addition of compatilizer, there is a dramatic shift from clear to fuzzy with no obvious reunion particles for the phase, and an unique melting peak in DSC curve appears at the optimum mass of 8% compatilizer. DSC and XRD confirm that they will crystallize individually as cooling from melt, but crystallinity of the latter is more than the former, which reduce the whole crystallinity at a wide range crystallization temperature. When cooled, PLA component with flexible chain will crystallize first; simultaneously, PET component at higher crystallization temperature will crystallize first when melted. TG indicates that the PET/PLA ratio is necessary for thermal stability of materials.
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