Preparation and properties of polyurethane sponge with low⁃temperature resistance and slow resilience

doi:10.19491/j.issn.1001-9278.2023.02.008

Abstract

Abstract:

In this paper， a polyurethane sponge material with low temperature resistance and slow resilience was prepared using silicone modified polyether （Si⁃APEG） as a low⁃temperature resistant agent. The Si⁃APEG was synthesized through a hydrosilylation reaction of allyloxy polyoxyethylene ether （APEG） and polymethylhydrosiloxane with chloroplatinic acid as a catalyst. The effects of the Si⁃APEG dosage on the apparent core density， porosity， tensile properties， resilience and temperature humidity sensitivity index of the sponge were investigated. The results indicated that the foam structure of the sponge was ideal at an Si⁃APEG dosage of 10 phr， and its comprehensive mechanical properties were optimal along with the lowest hardness and resilience. Meanwhile， the temperature and humidity sensitivity index of the sponge was as low as 1.01， and its hardness was as low as 53 degree at -10 ℃. Therefore， the sponge could achieve optimal comprehensive performance at an Si⁃APEG dosage of 10 phr.

Key words: polyurethane sponge, low temperature resistance, slow resilient, allyloxy poly（oxyethylene ether）, hardness

CLC Number:

TQ323.8

WENG Chengwu, ZHENG Yuying. Preparation and properties of polyurethane sponge with low⁃temperature resistance and slow resilience[J]. China Plastics, 2023, 37(2): 51-55.

Figures/Tables 8

基础配方	添加量/份
Polyol	40
PPG	40
POP	20
A⁃33	1.2
T⁃9	1
L⁃580	1
H₂O	1.3
MDI	62

Tab.1. Preparation formula of low resilience PU sponge

Fig.1. Hydrosilylation reaction scheme of Si⁃APEG

Fig.2. FTIR spectra of APEG and Si⁃APEG

Fig.3. Effect of Si⁃APEG content on apparent density and porosity of the sponge

Fig.4. Effect of Si⁃APEG content on mechanical properties of the sponge

Fig.5. Effect of Si⁃APEG dosage on the resillency of the sponge

Fig.6. Effects of Si⁃APEG content on temperature and humidity sensitivity index of the sponge

温度/℃	40	5	-10
纯PUF	60	73	90
含10 份 Si⁃APEG的PUF	47	48	53

Tab.2. Hardness of sponges tested at different temperature degree

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