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Prodegradant Additives Effect onto Comercial Polyolefins

机译：助剂添加剂对商业聚烯烃的影响

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摘要

Prodegradant additives (PDA) came up in the last few decades as a possible solution to the low degradability of polyolefins. PDAs attack polyolefins chains cutting and degrading them to a degree that eventually may allow phagocytosis by microorganisms. Also, considering that the PDA is added in very low quantities, main additives suppliers affirm that a priori they neither alter mechanical properties nor the recyclability of the polymer. In order to verify these claims, this work comprehends a systematic study to analyze the effectiveness of some commercially available PDAs on different polyolefins. Diverse degradability analysis of LDPE, HDPE and PP additivated with 1 and 2wt% of PDA were performed comparing changes on molecular weights, rheological and mechanical properties among them and base polyolefins, all under two kinds of experiments: natural and UV accelerated aging. It was found that the addition of PDA accelerates degradation since after both aging processes samples with PDA were significantly more degraded than base polyolefins under same conditions. Moreover, processing also contributes to the degradation process, being more noticeable in PP. However, results demonstrate that chain scission of polyolefins additivated with PDA is not being improved to an extent that would allow biodegradation.
机译：在过去的几十年中，助剂添加剂（PDA）出现了，可能是解决聚烯烃低降解性的一种方法。 PDA攻击聚烯烃链，将其切割并降解至最终可能导致微生物吞噬的程度。另外，考虑到PDA的添加量非常低，主要的添加剂供应商确认他们事先没有改变机械性能或聚合物的可回收性。为了验证这些主张，这项工作包含一项系统的研究，以分析某些商用PDA在不同聚烯烃上的有效性。在天然和紫外线加速老化两种实验中，分别对添加了1wt％和2wt％PDA的LDPE，HDPE和PP进行了多种降解性分析，比较了它们与基础聚烯烃的分子量，流变学和机械性能的变化。发现在相同条件下，PDA的添加均加速了降解，因为在两个老化过程之后，带有PDA的样品的降解程度均显着高于基础聚烯烃。而且，加工也有助于降解过程，在PP中更明显。但是，结果表明，与PDA加成的聚烯烃的断链性能没有得到改善，无法进行生物降解。

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  • 来源
    《Journal of Polymers and the Environment》 |2019年第3期|464-471|共8页
  • 作者

    Vazquez Y. V.; Ressia J. A.; Cerrada M. L.; Barbosa S. E.; Valles E. M.;

  • 作者单位

    UNS, CONICET, Planta Piloto Ingn Quim, PLAPIQUI, Cno La Carrindanga Km 7, RA-8000 Bahia Blanca, Buenos Aires, Argentina|Univ Nacl Sur, Dept Ingn Quim, Ave Alem 1253, RA-8000 Bahia Blanca, Buenos Aires, Argentina;

    UNS, CONICET, Planta Piloto Ingn Quim, PLAPIQUI, Cno La Carrindanga Km 7, RA-8000 Bahia Blanca, Buenos Aires, Argentina|Univ Nacl Sur, Dept Ingn Quim, Ave Alem 1253, RA-8000 Bahia Blanca, Buenos Aires, Argentina|Comis Invest Cient Prov Buenos Aires, RA-1900 La Plata, Buenos Aires, Argentina;

    CSIC, ICTP, Juan de la Cierva 3, Madrid 28006, Spain;

    UNS, CONICET, Planta Piloto Ingn Quim, PLAPIQUI, Cno La Carrindanga Km 7, RA-8000 Bahia Blanca, Buenos Aires, Argentina|Univ Nacl Sur, Dept Ingn Quim, Ave Alem 1253, RA-8000 Bahia Blanca, Buenos Aires, Argentina;

    UNS, CONICET, Planta Piloto Ingn Quim, PLAPIQUI, Cno La Carrindanga Km 7, RA-8000 Bahia Blanca, Buenos Aires, Argentina|Univ Nacl Sur, Dept Ingn Quim, Ave Alem 1253, RA-8000 Bahia Blanca, Buenos Aires, Argentina;

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  • 正文语种 eng
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  • 关键词

    Prodegradant additives; Polyethylene; Polypropylene; Degradation;

    机译：助剂;聚乙烯;聚丙烯;降解;

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