摘要
为确定原料配方对木塑复合材料(WPC)热稳定性的影响,采用差示扫描量热法,以氧化诱导时间(OIT)和氧化诱导温度(OIT*)为衡量指标,研究了抗氧化剂种类、用量及木粉的用量对聚丙烯(PP)/木粉复合材料热稳定性的影响。结果表明,未添加抗氧剂时,复合材料的OIT和OIT*分别为2.9 min和228.4℃,添加抗氧剂1024和1010均可明显改善复合材料的热稳定性,且抗氧剂1024的效果略优于1010;选用1010和168以1∶1混合的复配抗氧剂时,随着抗氧剂用量的增加,复合材料热稳定性明显增强,但其较佳用量为复合材料总质量的0.3%,此时,复合材料的OIT和OIT*分别增至28.2 min和250.8℃。木粉含量较小时,其对PP/木粉复合材料热稳定性的影响不明显,而当木粉含量由45%增至60%时,复合材料的热稳定性略有增强。
To determine the influence of raw material formula on the thermal stability of wood plastic composites（ WPC）,the effect of antioxidant species and dosages and wood flour content on the thermal stability of polypropylene（ PP）/wood flour composites is studied with a differential scanning calorimetry method,with oxidation induction time（ OIT） and the oxidation induction temperature（ OIT＊） as measurement indicators. The results show that in the case of no addition of antioxidants,the OIT and OIT＊ of the composite are 2. 9 min and 228. 4 ℃ respectively and that the addition of antioxidants 1024 and 1010 can obviously improve the thermal stability of the composites,with antioxidant1024 producing a slightly better effect than 1010; where a compound antioxidant based on the mixture of 1010 and160 at a ratio of 1∶ 1,with the increase in the antioxidant dosage,the thermal stability of the composites enhances significantly,but the optimal dosage is 0. 3% of the total mass of the composites,in which case,the OIT and OIT＊ of this composite material increase to 28. 2 min and 250. 8 ℃ respectively. In the case of a small wood powder content,it has no obvious effect on the thermal stability of PP/wood powder composite material,while in the case of wood powder content increase from 45% to 60%,the thermal stability of the composite increases slightly.
作者
周吓星
吴栋琳
黄六莲
袁小军
陈礼辉
ZHOU Xia-xing;WU Dong-Un;HUANG Liu-lian;YUAN Xiao-jun;CHEN Li-hui(College of Materials Engineering,Fujian Agriculture and Forestry University,Fuzhou Fujian 350002,China;Subtropical Experimental Center,CAF,Fenyi Jiangxi 336600,China)
出处
《林业机械与木工设备》
2018年第5期24-28,共5页
Forestry Machinery & Woodworking Equipment
基金
福建省科技厅引导性项目(2015H0011)
关键词
木塑复合材料
热稳定性
氧化诱导时间
氧化诱导温度
木粉
抗氧剂
wood plastic composites
thermal stability
oxidation induction time
oxidation induction temperature
wood flour
antioxidant
