Hyperbranched Polyester Based on the Core + AB2 Approach: Synthesis and Structural Investigation

被引：12
作者：
Jena, Kishore K. [1 ]
Narayan, Ramanuj [1 ]
Raju, K. V. S. N. [1 ]
机构：
[1] Indian Inst Chem Technol, Organ Coatings & Polymers Div, Hyderabad 500607, Andhra Pradesh, India
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 2010年 / 118卷 / 01期
关键词：
hyperbranched; FT-IR; MALDI; NMR; WATERBORNE POLYURETHANE; RELAXATION PROCESSES; ALIPHATIC POLYESTER; POLYMERS; CONDUCTIVITY; CYCLIZATION; MORPHOLOGY; POLYETHER; RHEOLOGY; BEHAVIOR;
D O I：
10.1002/app.32297
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
In this study, structural buildup studies during the synthesis of fifth-generation hyperbranched polyesters (HBPs) from 2-bis(hydroxymethyl) propionic acid (AB(2)) and glycerol (core) by a one-pot process were undertaken. The variations in the degree of polymerization, hydrogen bonding, rheology, and role of cyclization were studied by NMR, Fourier transform infrared spectroscopy, rheometry, and matrix-assisted laser desorption/ionization time of flight. The degree of branching was calculated at different time intervals from the integral peak areas of the terminal, linear, and dendritic repeating units of H-1-NMR and C-13-NMR. The rheology study performed on the HBPs revealed that hydrogen bonds played an important role in the determination of the melt viscosity. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 118: 280-290, 2010
引用
收藏
页码：280 / 290
页数：11
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