Nucleating and Plasticization Effects of Low-Loading Octavinyl-Polyhedral Oligomeric Silsesquioxanes in Novel Biodegradable Poly(ethylene succinate-co-diethylene glycol succinate)-Based Nanocomposite
Nucleating and Plasticization Effects of Low-Loading Octavinyl-Polyhedral Oligomeric Silsesquioxanes in Novel Biodegradable Poly(ethylene succinate-co-diethylene glycol succinate)-Based Nanocomposite
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DOI：
10.1021/acs.iecr.7b04004
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发表时间：
2017-12
影响因子：
4.2
通讯作者：
Siqi Teng;Zhaobin Qiu
中科院分区：
文献类型：
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作者：
Siqi Teng;Zhaobin Qiu
采用溶液浇铸法制备了一种新型的可生物降解的聚（丁二酸乙二醇酯-co-丁二酸二甘醇酯）（PEDEGS）基纳米复合材料，该材料含有低含量（0.5wt%）的八乙烯基多面体低聚倍半硅氧烷（ovi-POSS）。扫描电子显微镜图像显示ovi-POSS在PEDEGS基质中的良好分散。在等温熔融结晶条件下，PEDEGS在纳米复合材料中结晶速度加快，球晶密度增加，说明ovi-POSS起到了成核剂的作用。Ovi-POSS在PEDEGS基质中单独结晶，并且不改变PEDEGS的晶体结构。纳米复合材料的储能模量在较低的温度范围内降低;此外，PEDEGS的玻璃化转变温度也在纳米复合材料中降低，表明ovi-POSS还充当增塑剂和润滑剂。
A novel biodegradable poly(ethylene succinate-co-diethylene glycol succinate) (PEDEGS)-based nanocomposite containing low loading (0.5 wt %) of octavinyl-polyhedral oligomeric silsesquioxanes (ovi-POSS) was prepared via a solution and casting method. Scanning electron microscopy images illustrated a nice dispersion of ovi-POSS in PEDEGS matrix. PEDEGS crystallized faster in the nanocomposite under isothermal melt crystallization conditions; moreover, the density of PEDEGS spherulites also increased, indicating ovi-POSS acted as a nucleating agent. Ovi-POSS crystallized separately in the PEDEGS matrix and did not alter the crystal structure of PEDEGS. The storage modulus of the nanocomposite decreased in the lower-temperature range; moreover, the glass transition temperature of PEDEGS also decreased in the nanocomposite, indicating that ovi-POSS also acted as a plasticizer and lubricant.