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聚（3-羟基丁酸酯-3-羟基戊酸酯）/多面体低聚倍半硅氧烷杂化物的形态学与结晶行为

Morphology and crystallization behavior of poly(3-hydroxybutyrate--3-hydroxyvalerate)/polyhedral oligomeric silsesquioxane hybrids.

作者信息

Zhou Yuqi, Zhao Mingming, Guo Haiyang, Li Yuhao, Liu Qingsheng, Deng Bingyao

机构信息

Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University Wuxi 214122 China

Jiangsu Doway New Materials Science & Technology Co. Ltd. Suqian 223800 China.

出版信息

RSC Adv. 2019 Mar 12;9(15):8146-8158. doi: 10.1039/c8ra09281h.

DOI:10.1039/c8ra09281h
PMID:35518697
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9061301/
Abstract

Poly(3-hydroxybutyrate--3-hydroxyvalerate)/polyhedral oligomeric silsesquioxane (PHBV/POSS) hybrids with different POSS contents of 5, 10, 15, 20, 25 and 30 wt% were prepared by solution casting. The composition, crystallization and melting behavior, crystal structure, spherulite morphology, surface morphology, and tensile properties of PHBV/POSS hybrids were characterized by EDS, DSC, FTIR, XRD, HSPOM, AFM and a tensile testing machine. The results showed that POSS was well dispersed in the PHBV matrix. PHBV and POSS crystals coexisted in the hybrids. The crystallinity of pure PHBV was larger than that of PHBV/POSS hybrids. POSS restricted the crystallization of PHBV in PHBV/POSS hybrids. With the increase of POSS content, the crystallinity of PHBV/POSS hybrids decreased from 56.8 (pure PHBV) to 33.6% (PHBV/POSS hybrid with 30 wt%). However, the introduction of POSS did not affect the spherulite morphology of PHBV. The Avrami equation was used to describe the isothermal crystallization kinetics of PHBV/POSS hybrids. The results showed that as the crystallization temperature increased, the crystallization rate became slow. In addition, POSS can improve the tensile properties of PHBV.

摘要

通过溶液浇铸制备了具有5、10、15、20、25和30 wt%不同聚倍半硅氧烷（POSS）含量的聚（3-羟基丁酸酯-3-羟基戊酸酯）/聚倍半硅氧烷（PHBV/POSS）杂化材料。采用能谱仪（EDS）、差示扫描量热仪（DSC）、傅里叶变换红外光谱仪（FTIR）、X射线衍射仪（XRD）、高温扫描光学显微镜（HSPOM）、原子力显微镜（AFM）和拉伸试验机对PHBV/POSS杂化材料的组成及其结晶与熔融行为、晶体结构、球晶形态、表面形貌和拉伸性能进行了表征。结果表明，POSS在PHBV基体中分散良好。PHBV和POSS晶体在杂化材料中共存。纯PHBV的结晶度大于PHBV/POSS杂化材料的结晶度。POSS限制了PHBV/POSS杂化材料中PHBV的结晶。随着POSS含量的增加，PHBV/POSS杂化材料的结晶度从56.8%（纯PHBV）降至33.6%（含30 wt% POSS的PHBV/POSS杂化材料）。然而，POSS的引入并未影响PHBV的球晶形态。采用Avrami方程描述PHBV/POSS杂化材料的等温结晶动力学。结果表明，随着结晶温度升高，结晶速率变慢。此外，POSS可改善PHBV的拉伸性能。

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