Investigation of correlation between molecular structure and viscoelastic parameters of Poly(alkylstyrene)s

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K14079
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Polymer/Textile materials
• Research Institution: Nagoya University
• Principal Investigator: Takano Atsushi 名古屋大学, 工学研究科, 准教授 (00236241)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: ポリ（アルキルスチレン） / ガラス転移温度 / 粘弾性 / 相溶性

Outline of Final Research Achievements

In this study, a series of poly(n-alkylstyrene)s with the different number of carbon atoms (n) in the side alkyl groups (n=1-8) were synthesized by a anionic polymerization, and the glass transition temperature (Tg) and the viscoelasticity of the polymers were investigated.
Molecular weight dependence of Tg for poly(n-alkylstyrene)s were investigated by DSC. As the length of the alkyl side chain increases, the Tg of the poly(n-alkylstyrene)s decreases monotonically. It is considered that as the alkyl side chain increases, backbone chain mobility (segmental mobility) increases as well. Furthermore entanglement molecular weights (Me) for poly(n-alkylstyrene)s were investigated by dynamic viscoelastic measurements. As the length of the alkyl side chain increases, the Mes of the poly(n-alkylstyrene) increases monotonically. It is considered that as the length of side chain of the poly(n-alkylstyrene) increases, molecular chain size becomes thicker.

Free Research Field

高分子物性