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An atomic force microscopy study on the aggregation of isotactic poly(methyl methacrylate)
Liu, Jing; Wang, Ji-jun; Li, Ting; Zhou, Yong; Shen, De-yan; Huang, Yun; Yan, Shou-ke
2007-03-01
Source PublicationCHINESE JOURNAL OF POLYMER SCIENCE
ISSN0256-7679
Volume25Issue:2Pages:207-215
AbstractAggregation process of isotactic poly(methyl methacrylate) (i-PMMA) has been studied extensively for many years, and considerable progress has been made in both experimental and theoretical studies. They are, however, seldom sustained by real-space observations of the underlying morphology. In this paper, the aggregation process of i-PMMA in concentrated acetone solutions and the fractal structure of the resulting three-dimensional clusters were characterized on the basis of real-space AFM observations of their two-dimensional projection. It was found that spherical multiple-chain particles formed upon collapse and aggregation of the involving chains as a whole during quenching the solution to room temperature. By keeping the solution at room temperature, the initially formed particles stick together upon contact to form larger particles through reassembling very slowly. The succeeding collision of the enlarged spherical particles leads to the formation of small clusters. These newly formed small clusters grow when they meet with other clusters or single Brownian particles. This leads to the formation of large clusters with fractal dimension of 1.95 +/- 0.05, which suggest a reaction-limited cluster aggregation of i-PMMA in a concentrated acetone solution. This is in accordance with the conclusion obtained by light scattering measurements.
KeywordIsotactic Poly(Methyl Methacrylate) Aggregation Fractal Dimension Atomic Force Microscopy
Indexed BySCI
Language英语
WOS IDWOS:000250833700013
PublisherWORLD SCIENTIFIC PUBL CO PTE LTD
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Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/62292
Collection中国科学院化学研究所
Corresponding AuthorWang, Ji-jun
Affiliation1.Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing 100080, Peoples R China
2.Peking Univ, Dept Phys, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Liu, Jing,Wang, Ji-jun,Li, Ting,et al. An atomic force microscopy study on the aggregation of isotactic poly(methyl methacrylate)[J]. CHINESE JOURNAL OF POLYMER SCIENCE,2007,25(2):207-215.
APA Liu, Jing.,Wang, Ji-jun.,Li, Ting.,Zhou, Yong.,Shen, De-yan.,...&Yan, Shou-ke.(2007).An atomic force microscopy study on the aggregation of isotactic poly(methyl methacrylate).CHINESE JOURNAL OF POLYMER SCIENCE,25(2),207-215.
MLA Liu, Jing,et al."An atomic force microscopy study on the aggregation of isotactic poly(methyl methacrylate)".CHINESE JOURNAL OF POLYMER SCIENCE 25.2(2007):207-215.
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