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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and long-term stability of acrylic acid and N, N-methylene-bis-acrylamide radiation grafted polypropylene fibers
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Synthesis and long-term stability of acrylic acid and N, N-methylene-bis-acrylamide radiation grafted polypropylene fibers

机译：丙烯酸和N，N-亚甲基 - 双丙烯酰胺辐射接枝聚丙烯纤维的合成和长期稳定性

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摘要

New carboxyl ion-exchange fibers prepared by acrylic acid (AA) and N, N-methylene-bis-acrylamide (MBAA) monomer grafting to polypropylene (PP) fibers based on the method of gamma-rays pre-irradiation in air followed by a Mohr's salt redox initiation of grafting reaction were studied. Grafting degree, homopolymer quantity, monomer conversion and grafting efficiency were determined. FTIR spectroscopy was used to establish the nature of the grafted fibers. The thermal stability of the materials was investigated based on DSC analysis in N-2/O-2 mixture. The long-term stability during 6-8 years of storage was examined by the measurement of the tensile strength and the elongation at break of the fibers, and the chemical oxygen demand in water extracts as well as in the oxygen uptake experiments. The influence of some factors on the useful life of the grafted fibers was studied: a MBAA cross-linking, exposure to day light, the Fe (III) residue presence, a grafting reaction temperature. It was found that small amounts of the adsorbed Fe (III) ions increase the deterioration rate of the grafted fibers, while small amounts of MBAA delay this negative process.
机译：研究了丙烯酸（AA）和N，N-亚甲基双丙烯酰胺（MBAA）单体接枝聚丙烯（PP）纤维制备新型羧基离子交换纤维的方法，该方法采用空气中γ射线预辐照，然后通过莫尔盐氧化还原引发接枝反应。测定了接枝率、均聚物用量、单体转化率和接枝效率。FTIR光谱用于确定接枝纤维的性质。基于DSC分析，研究了材料在N-2/O-2混合物中的热稳定性。通过测量纤维的拉伸强度和断裂伸长率，以及水提取物中的化学需氧量以及吸氧实验，对6-8年储存期间的长期稳定性进行了检验。研究了MBAA交联、日光照射、Fe（III）残留、接枝反应温度等因素对接枝纤维使用寿命的影响。研究发现，少量吸附的Fe（III）离子会增加接枝纤维的劣化率，而少量的MBAA则会延迟这一负过程。

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