搜索:  
02 Catalyzing carbonization of poly(L-lactide) by nanosized carbon black combined with Ni2O3 for improving flame retardancy  
02 Catalyzing carbonization of poly(L-lactide) by nanosized carbon black combined with Ni2O3 for improving flame retardancy
资料类型: PDF文件
关键词: poly(L-lactide)  
资料大小: 493k
所属学科: 功能高分子
来源: 来源网络
简介:
Catalyzing the carbonization of a polymer itself to form a protective carbonaceous layer has attracted tremendous interest in the flame retardancy of polymers, but the efficiency of this strategy was largely limited to polymers containing heteroatoms within their backbone. In this study, a novel type of combined catalyst, consisting of nanosized carbon black (CB) and Ni2O3, was found to efficiently catalyze the carbonization of poly(L-lactide) (PLA) for the first time. The combined catalyst was more efficient than CB or Ni2O3 alone to enhance the char yield of PLA and improve its char layer structure, which greatly improved the flame retardancy of PLA. The catalytic pyrolysis for PLA composites and model carbonization experiments for their degradation products were carried out to investigate the carbonization process of PLA during combustion. The results indicated that the carbonization mechanism was attributed to the combined effect of the combined catalysts: CB catalyzed the degradation of PLA to selectively produce more aldehydes and ketones with lower carbon numbers, then these carbonyl compounds were dehydrogenated (and/or dehydrated) and transferred into carbon products catalyzed by the combination of CB and Ni catalysts.
上传人: gongjiang_hust
上传时间: 2018-10-01 0:08:45
下载次数: 1
消耗积分: 0  
立即下载:
1人
1人
1人
友情提示:下载后对该资源进行评论,即可奖励2分。
报告错误:  1.下载无效  2. 资料明显无价值  3. 资料重复存在

相关评论 共有0人发表评论 更多评论
你还没有登录,无法发表评论,请首先 登录 注册
免责声明:本站部分资源由网友推荐,来自互联网,版权属于原版权人,如果不慎侵犯到您的权利,敬请告知,我们会在第一时间撤除。本站中各网友的评论只代表其个人观点,不代表本站同意其观点。