ULTRASONIC BEHAVIOUR STUDIES ON METHYL METHACRYLATE COPOLYMERS

HU Jian-kai; ZHOU Jing; XU Wen-ying

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ULTRASONIC BEHAVIOUR STUDIES ON METHYL METHACRYLATE COPOLYMERS

Research Article | 更新时间：2021-03-19

- ULTRASONIC BEHAVIOUR STUDIES ON METHYL METHACRYLATE COPOLYMERS
- Acta Polymerica Sinica Issue 5, Pages: 551-556(1992)
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- Published：20 October 1992，
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HU Jian-kai, ZHOU Jing, XU Wen-ying. ULTRASONIC BEHAVIOUR STUDIES ON METHYL METHACRYLATE COPOLYMERS. [J]. Acta Polymerica Sinica (5):551-556(1992)
DOI：

HU Jian-kai, ZHOU Jing, XU Wen-ying. ULTRASONIC BEHAVIOUR STUDIES ON METHYL METHACRYLATE COPOLYMERS. [J]. Acta Polymerica Sinica (5):551-556(1992) DOI：

摘要

用超声脉冲回波法对甲基丙烯酸甲酯-甲基丙烯酸丁酯(MMA-BMA)、含交联剂的甲基丙烯酸甲酯-甲基丙烯酸(MMA-MAA)和苯乙烯-甲基丙烯酸(ST-MAA)等三类共聚物进行了超声衰减和声速实验研究.结果表明

随BMA含量的增加

MMA-BMA共聚物的超声衰减增大

而声速减小;交联剂的加入使共聚物MMA-MAA和ST-MAA的超声衰减明显增大.随着温度的升高

MMA-BMA的超声衰减单调缓慢增加

当温度上升到Tg时则急剧增大.Tg值随BMA的含量增加而降低.文章对上述结果给予了解释.

Abstract

Ultrasonic attenuation and velocities have been measured in three kinds of copolymers: Methyl methacrylate-Butyl methacrylate (MMA-BMA)

Methyl methacrylate-Methyl acrylic acid (MMA-MAA) containing different kinds of crosslinkers and Styrene-Methyl acrylic acid (ST-MAA) containing crosslinker EGD and BA respectively.Experimental results indicate that ultraconic attenuation increases and velocity decreases in MMA-BMA as increasing BMA content. Adding crosslinkers EGD or BA in MMA-MAA and in ST-MAA

ultrasonic attenuation inbcreases

velocity decreases evidently. The glass transition temperature Tg in MMA-BMA shifts towards lower temperature as BMA content. increasing.

关键词

超声衰减声速共聚物交联

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