化工学报2011，Vol.62Issue(9)：2643-2650,8.DOI:10.3969/j.issn.0438-1157.2011.09.038
废纸浆/HDPE复合发泡材料的流变行为及发泡形态
Rheological behavior and cell morphology of foamed waste paper pulp/HDPE composites
摘要
Abstract
Waste corrugated board was ground to paper pulp, which was used to prepare the foamed waste paper pulp/high density polyethylene ( HDPE) composites by compression molding with HDPE. The Rosand double-barrel capillary rheometer was used to study the influences of the blowing agent AC(azodicarbonamide) content, waste paper pulp content, temperature and different blowing agents on the melt of the composites. Scanning electron microscopy (SEM) was also used to observe the effects of different contents of AC and waste paper pulp on cell morphology. The results showed that the melt behavior of the foamed waste paper pulp/ HDPE composites was pseudoplastic flow, and when shear rate was up to 600 s~J wall slip was observed. The viscosity of the melt was significantly reduced with increasing content of AC, but increased with increasing content of waste paper pulp. When shear rate was reduced to 275 s ' or below, the viscosity of the melt was reduced as temperature increased; while when shear rate went up to 275 s"1 or higher, the viscosity of the melt increased as temperature increased. When shear rate was reduced to 325 s"1 or below, the melt with endothermic blowing agent (NaHCOs) showed the highest viscosity; when shear rate went up to 325 s"1 or higher, the melt with exothermic blowing agent AC showed the highest viscosity. The number of cell increased and the size of cell became smaller with increasing AC content, but the number of cell was reduced and the size of cell became larger with increasing content of waste paper pulp as observed by SEM.关键词
木塑/HDPE/发泡/流变/泡孔Key words
wood plastic composites: HDPE/ foam/ rheology/ cell分类
化学化工引用本文复制引用
曾广胜,许超,刘跃军,瞿金平..废纸浆/HDPE复合发泡材料的流变行为及发泡形态[J].化工学报,2011,62(9):2643-2650,8.基金项目
湖南省自然科学基金项目(09JJ6083) （09JJ6083）
国家科技部中小企业技术创新基金项目(09C26214301937) （09C26214301937）
湖南省教育厅科技计划(08C278) （08C278）
湖南省高校科技成果产业化培育项目(09CY016). （09CY016）
