摘要
利用HAAKE转矩流变仪Roller转子输入机械能对废弃交联发泡EVA物料进行机械力化学解交联,对解交联产物提取溶胶,溶胶质量分数随解交联时间的增加先快速增加,随后小幅变化;超过一定时间再增加解交联时间,它反而下降.以傅里叶变换红外光谱和热重法分析溶胶,表明其分子结构极类似于纯EVA,但是随着解交联时间的增加,溶胶分子的支化度有所提高.动态力学热分析显示出,解交联产物中包含多相多组分,存在2个以上玻璃化转变温度(θg),且随着解交联作用的加强,θg相互靠近,与纯EVA相比,θg往高温移动.扫描电子显微镜显示,解交联作用致使物料表面光滑,粗糙度降低,颗粒尺寸减小,多相多组分间的相容性增加,塑性也增加,这有利于废弃物料的资源化利用.
The mechanical energy input by Roller rotors in HAAKE torque rheometer was used to achieve mechanochemieal decrosslinking for the crosslinked and foamed ethylene-vinyl acetate co- polymer （EVA） waste material. The sol contents of the deerosslinked product were extracted and the results showed that at first the sol contents were rapidly increased with the decrosslinking time in- crease and then a little change of the sol contents was observed. When decrosslinking time was still increased, the sol contents dropped instead. Fourier transform infrared spectrum and thermogravim- etrie analysis were used to measure the sol contents and they showed that the molecular structures of the sol contents were very similar to that of pure EVA. While the decrosslinking time was in- creased, the branched degrees of the sol contents increased. Dynamic mechanical thermal analysis tests indicated that the decrosslinked product contained multiphases and muhicomponents. There were more than two glass transition temperatures for the decrosslinked product, with development of decrosslinking actions, these glass transition temperatures were close to each other. Compared with pure EVA, the glass transition temperatures of the decrosslinked product were shifted to higher tem- peratures. Scanning electron microscopy results showed that the surfaces of the decrosslinked prod- uct became smoothly, particle sizes were reduced, and the compatibility and thermoplastic proper- ties of the multiphase and multicomponent decrosslinked product had also been improved by mecha-nochemical decrosslinking actions. Mechanochemical favor of the recycle resource for this waste material. decrosslinking was an efficient method in great favor of the recycle resource for this waste material.
出处
《福建师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第1期68-74,共7页
Journal of Fujian Normal University：Natural Science Edition
基金
福建省自然科学基金资助项目(2012J01030)
福建省大学生创新创业训练计划项目(SJCXCY-2012010
FJNU2011-023
BKL2011-036)
关键词
乙烯-乙酸乙烯酯共聚物
解交联
热性能
机械力化学
ethylene-vinyl acetate copolymer
decrosslinking
thermal properties
mechano-chemistry
