2011 Fiscal Year Final Research Report
Role of disentanglement via transesterification in the formation of shish structure of polyesters
| Project/Area Number |
22750206
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Polymer/Textile materials
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| Research Institution | Okayama University |
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Principal Investigator |
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| Project Period (FY) |
2010 – 2011
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| Keywords | ポリエステル / 結晶化 / 流動 / 絡み合い / シシ構造 / 核生成 |
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| Research Abstract |
In order to clarify the effect of disentanglement via transesterification on the formation of shish structure, we studied the mechanism using several polyesters having different spacer length between ester groups such as poly(L-lactic acid); PLLA, poly(12-hydroxydodecanoic acid); PHDA and poly(16-hydroxyhexadecanoic acid); PHHA. We found that the saturated formation density of shish v_<sh> decreased with increasing frequency of transesterification. On the other hand, we also found that the formation rate of shish I of PHDA was smaller than that of PHHA. This indicates that frequency of transesterification of the former is higher than that of the latter. We concluded that disentanglement via transesterification of polyesters significantly suppresses the formation of shish structure.
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