维普中文期刊产品整合服务

Poly(lactic acid)-starch/Expandable Graphite (PLA-starch/EG) Flame Retardant Composites

查看全文 作　　者：Mfiso Emmanuel [1]Mngomezulu;Adriaan Stephanus [2]Luyt;Steve Anthony [3]Chapple;Maya Jacob [3,4]John 高影响力作者 机构地区：[1]Department of Chemistry,University of the Free State(Qwaqwa Campus),Private Bag X13,Phuthaditjhaba 9866,South Africa;[2]Center for Advanced Materials,Qatar University,PO Box 2713,Doha,Qatar;[3]CSIR Materials Science and Manufacturing,Polymers and Composites Competence Area,PO Box 1124,Port Elizabeth 6000,South Africa;[4]Department of Chemistry,Faculty of Science,Nelson Mandela Metropolitan University,PO Box 1600,Port Elizabeth 6000,South Africa高影响力机构 出　　处：《Journal of Renewable Materials》索引2018年第6卷第1期,共12页高影响力期刊 摘　　要：This work reports on the effect of commercial expandable graphite(EG)on the flammability and thermal decomposition properties of PLA-starch blend.The PLA-starch/EG composites were prepared by melt-mixing and their thermal stability,volatile pyrolysis products and flammability characteristics were investigated.The char residues of the composites,after combustion in a cone calorimeter,were analyzed with environmental scanning electron microscopy(ESEM).The thermal decomposition stability of the composites improved in the presence of EG.However,the char content was less than expected as per the combination of the wt%EG added into PLA-starch and the%residue of PLA-starch.The flammability performance of the PLA-starch/EG composites improved,especially at 15 wt%EG content,due to a thick and strong worm-like char structure.The peak heat release rate(PHRR)improved by 74%,the total smoke production(TSP)by 40%and the specific extinction area(SEA)by 55%.The improvements are attributed to the ability of EG to exfoliate at increased temperatures during which time three effects occurred:(i)cooling due to an endothermic exfoliation process,(ii)dilution due to release of H2O,SO2 and CO2 gases,and (iii)formation of a protective intumescent char layer.However,the CO and CO2 yields were found to be unfavorably high due to the presence of EG. 关 键 词：Poly(lactic acid)-starch composites expandable graphite thermal stability flammability properties
相关文献

参考文献(45)

引证文献(1)

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1　渝公网安备 50019002500403号　违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费