私密直播全婐app免费大渔直播,国产av成人无码免费视频,男女同房做爰全过程高潮,国产精品自产拍在线观看

當(dāng)前位置:> 首頁 > 論文著作 > 正文
A molecularly engineered bioderived polyphosphate for enhanced flame retardant, UV-blocking and mechanical properties of poly(lactic acid)
作者:Zhang Y, Jing J, Liu T, Xi LD, Sai T, Ran SY, Fang ZP*, Huo SQ, Song PA*
關(guān)鍵字:Polylactic acid, Bioderived flame retardants, Flammability, UV protection, Toughness
論文來源:期刊
具體來源:Chem. Eng. J., 2021.5, 411: 128493
發(fā)表時(shí)間:2021年
Polylactic acid (PLA) represents one of most promising bioplastics in response to the increasing global micro-plastics pollution issue facing the entire ecosystem. Nevertheless, PLA is inherently flammable and also prone to UV-light attack, significantly restricting its wide applications in packaging, fibers and electronics industry. Despite high effectiveness in PLA, existing polyphosphate-based flame retardants are usually synthesized mainly from non-degradable petrochemical compounds and their functions are limited to improving flame retardancy of the polymeric matrix. We, herein, report the synthesis of a novel multifunctional bioderived polyphosphate (PPD) for PLA by using plant-derived diphenolic acid as a starting material. Our results reveal that the addition of 6 wt% of PPD enables PLA to achieve a desirable UL-94V-0 rating and a high LOI value of 27.1% due to its high gas-phase activity, which means that the final PLA fully meets the demanding flame retardancy requirement in industry. Moreover, the resultant flame-retardant PLA shows a high ultraviolet protection factor (UPF) value of 403, which indicates its excellent UV protection capability. Because of the fine and uniform dispersion of PPD within the resin matrix and their strong interfacial interactions, the PLA/6% PPD shows a 31% increase in impact toughness and a slight improvement in tensile strength compared to the bulk PLA. This work provides a strategy to synthesize a multifunctional bio-based polyphosphate flame retardant, which holds great promise for extending the practical applications of PLA with excellent flame retardancy, UV-blocking and mechanical performances.
主站蜘蛛池模板: 阿城市| 津市市| 乐昌市| 陆良县| 汨罗市| 沁水县| 邵阳县| 上饶市| 若羌县| 吴堡县| 永宁县| 雷波县| 海宁市| 通辽市| 治县。| 百色市| 清水河县| 海口市| 射洪县| 克什克腾旗| 会宁县| 金门县| 泸定县| 铜鼓县| 澄江县| 和政县| 漳州市| 通渭县| 会昌县| 武强县| 德清县| 河北省| 鄂托克前旗| 右玉县| 贡山| 保山市| 陆良县| 崇礼县| 凉城县| 平凉市| 安远县|