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苯乙烯改性杉木的粘弹性和热性能

Viscoelastic and Thermal Properties of Styrene Modified Fir Wood.

作者信息

Jambreković Branimir, Govorčin Bajsić Emi, Španić Nikola, Sedlar Tomislav, Sinković Tomislav

机构信息

Faculty of Forestry and Wood Technology, University of Zagreb, 10000 Zagreb, Croatia.

Faculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, Croatia.

出版信息

Polymers (Basel). 2022 Feb 17;14(4):786. doi: 10.3390/polym14040786.

DOI:10.3390/polym14040786
PMID:35215699
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8877626/
Abstract

The modification of wood and its surface is one of the challenges that is being perfected with the aim of transitioning to sustainable management. This study investigated the dynamic mechanical and thermal behaviour of unmodified and styrene modified fir wood ( Mill.). Styrene monomer was chosen and impregnated into the porous structure of fir wood by reversible addition-fragmentation chain transfer (RAFT) polymerisation. Attenuated total reflection Fourier-transform infrared spectroscopy (FTIR-ATR), dynamic mechanical analysis (DMA), and thermogravimetric analysis (TGA) were employed to characterise the chemical structure, viscoelastic properties, and thermal stability of unmodified and modified (surface-modified) wood. All tests have to be regarded as being preliminary due to the small number of specimens. Fourier transform infrared analysis showed evidence of the phenyl group from styrene at 700 cm. DMA results showed that the modified wood caused an increase in the glass transition temperature relative to the unmodified wood. In addition, modification with styrene improves thermal stability, as revealed by thermogravimetric analysis (TGA).

摘要

木材及其表面的改性是朝着可持续管理转型过程中不断完善的挑战之一。本研究调查了未改性和苯乙烯改性冷杉木材（Mill.）的动态力学和热行为。选择苯乙烯单体，并通过可逆加成-断裂链转移（RAFT）聚合将其浸渍到冷杉木材的多孔结构中。采用衰减全反射傅里叶变换红外光谱（FTIR-ATR）、动态力学分析（DMA）和热重分析（TGA）来表征未改性和改性（表面改性）木材的化学结构、粘弹性性能和热稳定性。由于试样数量较少，所有测试都应视为初步测试。傅里叶变换红外分析表明，在700 cm处有来自苯乙烯的苯基的证据。DMA结果表明，相对于未改性木材，改性木材使玻璃化转变温度升高。此外，热重分析（TGA）表明，用苯乙烯改性可提高热稳定性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/470e/8877626/1457c827ff7f/polymers-14-00786-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/470e/8877626/98da387d17c3/polymers-14-00786-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/470e/8877626/97227c97361d/polymers-14-00786-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/470e/8877626/033313248df4/polymers-14-00786-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/470e/8877626/7ed4c6485cab/polymers-14-00786-g004a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/470e/8877626/f750c4e79a27/polymers-14-00786-g005a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/470e/8877626/85315e9968c1/polymers-14-00786-g006a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/470e/8877626/1457c827ff7f/polymers-14-00786-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/470e/8877626/98da387d17c3/polymers-14-00786-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/470e/8877626/97227c97361d/polymers-14-00786-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/470e/8877626/033313248df4/polymers-14-00786-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/470e/8877626/7ed4c6485cab/polymers-14-00786-g004a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/470e/8877626/f750c4e79a27/polymers-14-00786-g005a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/470e/8877626/85315e9968c1/polymers-14-00786-g006a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/470e/8877626/1457c827ff7f/polymers-14-00786-g007.jpg

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