摘要
为探究生物基聚酰胺56(PA56)试样室内人工加速老化与户外暴晒老化的老化规律,采用热氧光老化和户外暴晒老化方法研究了老化时间对PA56试样结构及性能的影响。结果表明,PA56经2种老化方法老化后,拉伸强度均有不同程度的下降;从红外和X射线粉末衍射图谱来看,经老化后,样品的化学结构没有发生变化,没有新的吸收峰和新晶型出现;随着老化时间的延长,PA56的结晶度(X_(c))逐渐减小,C=O含量逐渐增加,户外暴晒老化60d和热氧光老化30d样品的X_(c)比未老化样品分别降低了1.1%和0.8%,C=O含量相较于老化前的2.42%分别提高到了4.05%和3.76%。对比2种老化方法的力学性能随老化时间的变化,发现热氧光老化速率近似为户外暴晒老化的3倍。
In order to investigate the effects of indoor accelerated aging and outdoor exposure on the structure and properties of biobased polyamide 56(PA56)samples,the effects of different aging time on the structure and properties of PA56 samples were studied by thermal oxygen photoaging and outdoor exposure aging methods.The results show that the tensile strength of PA56 decreases in different degrees after aging by two aging methods.According to the infrared spectra and X-ray powder diffraction patterns,the chemical structure of the samples does not change after aging,and no new absorption peaks and new crystal types appear.With the increasing of aging time,the crystallinity(X_(c))of PA56 gradually decreases,and the content of C=O gradually increases.The X_(c) of the samples subjected to outdoor exposure aging for 60 d and thermal oxygen photoaging for 30 d is decreased by 1.1%and 0.8%,respectively,compared with that of the samples without aging,and the content of C=O increases to 4.05%and 3.76%,respectively,compared with 2.42%before aging.By comparing the mechanical properties of the two aging methods with aging time,it is found that the aging rate of thermal oxygen photoaging is approximately 3 times that of outdoor exposure to aging.
作者
叶勒扎提·阿依提别克
李鸿环
赵元博
阿不来提·阿不力米提
买买提江·依米提
Yelzati Ayitibek;Honghuan Li;Yuanbo Zhao;Ablat Ablimit;Mamatjan Yimit(School of Chemical Engineering,Xinjiang University,Urumqi 830046,China;Cathay(Wusu)Biomaterials Co.,LTD,Wusu 834700,China)
出处
《高分子材料科学与工程》
北大核心
2025年第9期83-91,共9页
Polymer Materials Science & Engineering
基金
新疆维吾尔自治区重点研发项目(2023B01003)。
关键词
生物基聚酰胺56
热氧光老化
户外暴晒
结晶
力学性能
bio-based polyamide 56
thermal oxygen photoaging
outdoor exposure
crystallization
mechanical property
