Abstract
The damping properties of polybutyl methacrylate (PBMA)/aromatic petroleum resin (C9) composite were investigated in this work. In particular, a trace of styrene (St) was introduced to copolymerize with PBMA to improve the compatibility between C9 and matrix. The structure of the copolymer, P(BMA-co-St), was characterized by FTIR and 1HNMR. The P(BMA-co-St)/C9 composites were tested by differencial scanning calorimetry (DSC), scanning electron microscopy (SEM) and dynamical mechanical analysis (DMA). DSC curves of all P(BMA-co-1wt%St)/C9 composites expressed only one glass transition temperature (Tg). SEM images showed that C9 had good compatibility with the matrix after St was introduced. DMA curves indicated that the addition of C9 had a positive effect on the damping properties of PBMA. The loss tangent (tanδ) peak moved to a higher temperature with the increment content of C9, and the effective damping temperature range increased significantly. The influence of aromatic resin C9 and aliphatic resin (C5) on PBMA damping performance was compared. It was further shown that C9 with benzene ring effectively improved the damping performance of PBMA.
Highlights
The vibration and noise pollution affect daily live seriously, and decrease the stability and accuracy of equipment operation
The glass transition temperature of Polybutyl methacrylate (PBMA) is close to normal temperature [11,12,13,14], which makes it more widely used
The butyl methacrylate (BMA), styrene (St), sodium persulfate, aluminium oxide, sodium dodecyl benzene sulfonate (SDBS), absolute ethyl alcohol, tetrahydrofuran, ethyl acetate were supplied by ChinaKelong Chemical Reagent Factory (Chengdu, China)
Summary
The vibration and noise pollution affect daily live seriously, and decrease the stability and accuracy of equipment operation. It is an effective way to widen the damping temperature range of polymer materials by adding small organic molecules and oligomer [15,16,17,18,19]. The tanδ peak shifted to higher temperature and the effective damping temperature range was broadened significantly with the increment content of C5 resin. Wu [21] investigated the chlorinated butyl rubber/petroleum resins blends, which only showed a single tanδ peak. With increase in the content of the C5 resin, the effective damping temperature range was broadened remarkably. The damping performance of chlorinated butyl rubber was not improved by adding C9 due to poor compatibility. With the increasing softening point and content of the resin, the main tanδ peak shifted to higher temperatures and the useful damping temperature range was broadened. The variation of damping property of PBMA with the content of C9 was investigated, aiming at preparing a damping material with wide damping temperature domain and high damping property
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