Preparation and properties of polyurethane foams with different contents of polyether polyol

doi:10.19491/j.issn.1001-9278.2022.03.017

Abstract

Abstract:

Polyurethane foams were prepared through a one?step method at four different ratios of isophorone diisocyanate to polyether polyol. The morphology， apparent density， moisture absorption rate， sound absorption， and sound insulation properties of the resulting polyurethane foams were investigated using infrared spectrum， DSC， TG， and noise?measuring instrument. The results indicated that there was no difference in the foam composition caused by the addition amount of polyether polyols. The coexistence of closed cell， semi closed cell and open hole was found from the polyurethane foams. The polyurethane foam obtained from the formula C exhibited an apparent density of 407.6 kg/m³， a moisture absorption of 167.1 %， a sound absorption coefficient of 0.6， and a transmission loss of 25 dB. There data were maximum among all the formulations. Moreover， the glass transition temperature increased， and the thermal stability resulting from the formula C were also optimal. As a result， the formula C led to good sound absorption performance and poor sound insulation performance for the polyurethane foams.

Key words: polyurethane foam, polyether polyol, apparent density, thermal stability, sound absorption and sound insulation property

CLC Number:

TQ328.3

ZHANG Shucheng, TANG Wenbin, YU Tianjiao, XU Zhenzhen, XING Jian. Preparation and properties of polyurethane foams with different contents of polyether polyol[J]. China Plastics, 2022, 36(3): 104-109.

Figures/Tables 9

配方编号	聚醚多元醇	异佛尔酮二异氰酸酯	三乙醇胺	辛酸亚锡	二月桂酸二丁基锡	十二烷基硫酸钠	二氯甲烷	石蜡	硅油	去离子水
A	140.7	100	3.0	1.9	2.0	0.7	5.0	7.8	9.3	3.7
B	148.1	100	3.0	1.9	2.0	0.7	5.0	7.8	9.3	3.7
C	155.6	100	3.0	1.9	2.0	0.7	5.0	7.8	9.3	3.7
D	163.0	100	3.0	1.9	2.0	0.7	5.0	7.8	9.3	3.7

Tab.1. Experimental formulas

Fig.1. Reaction mechanism of polyurethane foam prepared by one step process

Fig.2. Infrared spectrum of polyether polyols and polyurethane foam with different formulations

Fig.3. Micrographs of polyurethane foam with different formulations

Fig.4. Apparent density and moisture absorption rate of polyurethane foam with different formulations

Fig.5. DSC analysis curves of polyurethane foam with different formulations

Fig.6. TG analysis curves of polyurethane foam with different formulations

Fig.7. Sound absorption properties of polyurethane foam with different formulations

Fig.8. Sound insulation properties of polyurethane foam with different formulations

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