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首页> 外文期刊>Journal of Polymers and the Environment >The Structure and Properties of Biodegradable PLLA/PDLA for Melt-Blown Nonwovens
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The Structure and Properties of Biodegradable PLLA/PDLA for Melt-Blown Nonwovens

机译：熔喷非织造布可生物降解的PLLA / PDLA的结构和性能

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摘要

Poly(l-lactic acid) (PLLA) and poly(d-lactic acid) (PDLA) blends with various compositions, utilized for melt-blown nonwovens, were prepared by a melt blending method. Their structure and properties were investigated by differential scanning calorimetry, thermal mechanical analyzer (DMA), X-ray diffraction, polarized optical microscope, field emission scanning electron microscope, and a universal testing machine, respectively. The results showed that the addition of PDLA decreased the glass transition temperature of PLLA. The PLLA/PDLA blends with the 0.3 % PDLA had the lowest the melting temperature and the degree of crystallization. The growth rate and size of the spherulites of the blends increased with the increase of the PDLA content. PLA stereocomplex could be achieved in the PLLA/PDLA blends. PDLA phase was dispersed uniformly in PLLA matrix in the formation of small circular particles. An increase of the PDLA content resulted in the improvement of the fracture toughness of the blends. When the PDLA content was 0.3 %, the blends achieved the highest elongation at break and toughness. Moreover, PDLA had a positive effect on the enhancement of the toughness of PLLA/PDLA melt-blown nonwovens.
机译：通过熔融共混法制备具有各种组成的用于熔融吹塑非织造布的聚（1-乳酸）（PLLA）和聚（d-乳酸）（PDLA）共混物。分别通过差示扫描量热法，热机械分析仪（DMA），X射线衍射，偏振光学显微镜，场发射扫描电子显微镜和通用测试机研究了它们的结构和性能。结果表明，PDLA的加入降低了PLLA的玻璃化转变温度。具有0.3％PDLA的PLLA / PDLA共混物的熔融温度和结晶度最低。随着PDLA含量的增加，共混物的球晶的生长速率和尺寸增加。 PLA立体复合物可以在PLLA / PDLA共混物中实现。 PDLA相均匀分散在PLLA基质中，形成小的圆形颗粒。 PDLA含量的增加导致共混物的断裂韧性的改善。当PDLA含量为0.3％时，共混物获得最高的断裂伸长率和韧性。而且，PDLA对增强PLLA / PDLA熔喷非织造布的韧性具有积极作用。

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  • 来源
    《Journal of Polymers and the Environment》 |2017年第2期|510-517|共8页
  • 作者

    Yu Bin; Cao Yongmin; Sun Hui; Han Jian;

  • 作者单位

    Zhejiang Sci Tech Univ, Sch Mat & Text, Hangzhou 310018, Zhejiang, Peoples R China|Key Lab Ind Text Mat & Mfg Technol, Hangzhou 310018, Zhejiang, Peoples R China;

    Key Lab Ind Text Mat & Mfg Technol, Hangzhou 310018, Zhejiang, Peoples R China;

    Zhejiang Sci Tech Univ, Sch Mat & Text, Hangzhou 310018, Zhejiang, Peoples R China|Key Lab Ind Text Mat & Mfg Technol, Hangzhou 310018, Zhejiang, Peoples R China;

    Zhejiang Sci Tech Univ, Sch Mat & Text, Hangzhou 310018, Zhejiang, Peoples R China|Key Lab Ind Text Mat & Mfg Technol, Hangzhou 310018, Zhejiang, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Poly(L-lactic acid); Poly(D-lactic acid); Structure; Toughness; Nonwoven;

    机译：聚（L-乳酸）;聚（D-乳酸）;结构;韧性;非织造;

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