Study on preparation and resilience of PBAT foams with high volume expansion ratio

doi:10.19491/j.issn.1001-9278.2023.09.004

Abstract

Abstract:

In this paper， a green， simple， and feasible method was developed for solving the shrinking problem of poly（butylene adipate⁃butylene terephthalate）（PBAT） foams with a high volume expansion ratio. Firstly， a chain extender （CE） and a cell stabiliser （GMS） were melt blended with PBAT， and then supercritical CO₂ was used to prepare PBAT foams. The rheological test results indicated that the addition of CE increased the energy⁃storage modulus by 3 orders of magnitude and the complex viscosity by 2 orders of magnitude. The dimensional stability of the PBAT foams increased gradually with an increase in the GMS content. The PBAT foams obtained an expansion ratio of 23.1 at a CE content of 2 wt% and a GMS content of 1.8 wt%， and their shrinkage rate and resilience rate was 8 % and 90 %， respectively. This indicated the successful preparation of the PBAT foams with a high expansion ratio， and excellent resilience， and good dimensional stability.

Key words: poly （butylene adipate?butylene terephthalate）, chain extension, supercritical carbon dioxide, foaming, high volume expansion ratio, resilience

CLC Number:

TQ323.4

JIAO Yang, WANG Longzhen, CAI Zhuorui, LIU Ronghao, ZHANG Yuxia, ZHOU Hongfu. Study on preparation and resilience of PBAT foams with high volume expansion ratio[J]. China Plastics, 2023, 37(9): 19-27.

Figures/Tables 11

References 20

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样品	PBAT/份	CE/份	GMS/份
纯PBAT	100	0	0
PBAT/CE2	100	2	0
PBAT/CE2/GMS0.6	100	2	0.6
PBAT/CE2/GMS1.2	100	2	1.2
PBAT/CE2/GMS1.8	100	2	1.8

样品	PBAT/份	CE/份	GMS/份
纯PBAT	100	0	0
PBAT/CE2	100	2	0
PBAT/CE2/GMS0.6	100	2	0.6
PBAT/CE2/GMS1.2	100	2	1.2
PBAT/CE2/GMS1.8	100	2	1.8

样品	T_c/℃	ΔH_c/ J·g^-1	T_m/℃	ΔH_m/ J·g^-1	χ_c/%
纯PBAT	72.5	13.9	121.57	8.3	7.3
PBAT/CE2	87.24	3.9	127.34	1.8	1.56
PBAT/CE2/GMS0.6	89.02	5.54	126.89	2.122	1.82
PBAT/CE2/GMS1.2	89.33	5.786	127.08	2.113	1.80
PBAT/CE2/GMS1.8	89.32	5.742	127.1	2.153	1.82

样品	T_c/℃	ΔH_c/ J·g^-1	T_m/℃	ΔH_m/ J·g^-1	χ_c/%
纯PBAT	72.5	13.9	121.57	8.3	7.3
PBAT/CE2	87.24	3.9	127.34	1.8	1.56
PBAT/CE2/GMS0.6	89.02	5.54	126.89	2.122	1.82
PBAT/CE2/GMS1.2	89.33	5.786	127.08	2.113	1.80
PBAT/CE2/GMS1.8	89.32	5.742	127.1	2.153	1.82

样品	泡孔尺寸/ μm	泡孔密度/ 个·cm^-3	发泡倍率	收缩率/ %
纯PBAT	-	-	4.1	-
PBAT/CE2	99.69	1.36×10⁶	32.84	19
PBAT/CE2/GMS0.6	80.30	1.57×10⁶	31.57	14.6
PBAT/CE2/GMS1.2	75.43	2.4×10⁶	28.65	10
PBAT/CE2/GMS1.8	71.99	3.1×10⁶	23.1	8