电子扫描显微镜下的乳胶成膜机制-----外文翻译.doc
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电子扫描显微镜下的乳胶成膜机制-----外文翻译,kalin dragnevski,*1 athene donald,1 phil taylor,2 martin murray,3 simon davies,3 elizabeth bone3summary: environmental scanning electron microscopy (esem) was u...
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Kalin Dragnevski,*1 Athene Donald,1 Phil Taylor,2 Martin Murray,3 Simon Davies,3 Elizabeth Bone3
Summary: Environmental scanning electron microscopy (ESEM) was used to study the film formation mechanisms and extent of coalescence of three acrylic latex com- positions with different glass transition temperatures (Tg), here defined as standard- low Tg, standard-high Tg (both carboxymethyl cellulose- stabilised) and novel (stabilised with a novel polysaccharide derived from agricultural waste). The ESEM analysis revealed that the microstructure of the standard – low-Tg system consisted of individual particles in dispersion and upon evaporation a continuous film formed, whereas in the case of the standard - high Tg latex particle deformation was not observed, but particle aggregation resulted in the formation of crystal-like structures that have formed via the formation of stacking faults. However, in the case of the novel system the microstructure consisted of individual particles and clusters and during evaporation a discontinuous film formed with voids present within its structure and some of the clusters accumulating on the surface of the specimens.
Keywords: ESEM; film formation; polymer latex
Introduction
摘要：环境扫描电子显微镜（ESEM）被用来研究三丙烯酸乳胶组合物在不同玻璃转变温度（Tg）下的成膜机理和凝聚程度，这里的转变温度定义为标准低温转变温度，标准高温转变温度（两者温度下都是羧甲基纤维素稳定的）和新型的转变温度（用一种从农业废弃物中提取的新型多糖稳定）。环境扫描电镜分析表明标准低玻璃转变温度下的系统的微观结构由单个粒子在分散蒸发后形成连续膜，而在标准高玻璃转变温度的情况下，没有观察到乳胶粒子变形，但是粒子聚集通过堆垛层错结构的形成形成了晶体状结构。然而在新系统下，微观结构由单个粒子和集团组成，并且在蒸发过程中，形成一个不连续薄膜，并且在其组织结构内有空洞，一些集团积累在试样表面。
关键词：环境扫描电子显微镜，成膜，聚合乳胶。
简介
聚合物乳胶，由于其广泛的用途，已经成为许多理论和实验研究的课题。传统用作油漆或粘合剂时，乳胶以潮湿的状态用于物体表面，并且可以在室温条件下干燥成膜。因此，传统的电子显微镜由于其极端干燥的观测条件和样品制备的要求，将不适合在潮湿的状态下的乳胶观察。另一方面，环境扫描电子显微镜使得观察潮湿和绝缘样品成为可能，已经成功用于包括乳胶成膜的研究的大量系统和动态过程的研究。
Summary: Environmental scanning electron microscopy (ESEM) was used to study the film formation mechanisms and extent of coalescence of three acrylic latex com- positions with different glass transition temperatures (Tg), here defined as standard- low Tg, standard-high Tg (both carboxymethyl cellulose- stabilised) and novel (stabilised with a novel polysaccharide derived from agricultural waste). The ESEM analysis revealed that the microstructure of the standard – low-Tg system consisted of individual particles in dispersion and upon evaporation a continuous film formed, whereas in the case of the standard - high Tg latex particle deformation was not observed, but particle aggregation resulted in the formation of crystal-like structures that have formed via the formation of stacking faults. However, in the case of the novel system the microstructure consisted of individual particles and clusters and during evaporation a discontinuous film formed with voids present within its structure and some of the clusters accumulating on the surface of the specimens.
Keywords: ESEM; film formation; polymer latex
Introduction
摘要：环境扫描电子显微镜（ESEM）被用来研究三丙烯酸乳胶组合物在不同玻璃转变温度（Tg）下的成膜机理和凝聚程度，这里的转变温度定义为标准低温转变温度，标准高温转变温度（两者温度下都是羧甲基纤维素稳定的）和新型的转变温度（用一种从农业废弃物中提取的新型多糖稳定）。环境扫描电镜分析表明标准低玻璃转变温度下的系统的微观结构由单个粒子在分散蒸发后形成连续膜，而在标准高玻璃转变温度的情况下，没有观察到乳胶粒子变形，但是粒子聚集通过堆垛层错结构的形成形成了晶体状结构。然而在新系统下，微观结构由单个粒子和集团组成，并且在蒸发过程中，形成一个不连续薄膜，并且在其组织结构内有空洞，一些集团积累在试样表面。
关键词：环境扫描电子显微镜，成膜，聚合乳胶。
简介
聚合物乳胶，由于其广泛的用途，已经成为许多理论和实验研究的课题。传统用作油漆或粘合剂时，乳胶以潮湿的状态用于物体表面，并且可以在室温条件下干燥成膜。因此，传统的电子显微镜由于其极端干燥的观测条件和样品制备的要求，将不适合在潮湿的状态下的乳胶观察。另一方面，环境扫描电子显微镜使得观察潮湿和绝缘样品成为可能，已经成功用于包括乳胶成膜的研究的大量系统和动态过程的研究。
