Preparation and properties of bio⁃based poly（urea⁃amide）s

doi:10.19491/j.issn.1001-9278.2024.01.001

Abstract

Abstract:

A series of bio⁃based poly（urea⁃amide）s （PUAs） with high strength and high toughness were synthesized through a one⁃pot method using urea， 1，10⁃decanediamine， and diacids as raw materials without any catalyst or any solvent. Di（aminodecyl）urea was first synthesized via urea ammonolysis with 1，10⁃decanediamine and then polymerized with different diacids such as 1，10⁃decanedioic acid （DA10）， 1，12⁃dodecanedioic acid， and dimer acid （DmA）. The chemical structures of the as⁃synthesized PUAs were confirmed by ¹H⁃NMR and FTIR spectroscopy， and their M_n's are about 12~13 kg/mol. The PUAs are processible with tensile strength of 25~45 MPa and elongation at break of 400 %~700 %. The strain at break value of PUA⁃DA10 is approximately twice as much as PA1010， whereas these two materials exhibit similar tensile strength. The strain at break of PUA⁃DmA is higher than that of PA⁃DmA， but they show similar tensile strength. The introduction of urea groups into the backbones of polyamides can improve their performance. This simple synthetic method is quite suitable for enhancing the performance of bio⁃based polyamide as well as for their diverse design and applications.

Key words: poly（urea?amide）s, bio?based polymer, thermoplastic polymer, urea

CLC Number:

TQ323.6

PAN Bochao, LIN Chenxi, TANG Donglin. Preparation and properties of bio⁃based poly（urea⁃amide）s[J]. China Plastics, 2024, 38(1): 1-6.

Figures/Tables 12

References 25

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样品	第一阶段		第二阶段		第三阶段		真空度/MPa
样品	设置温度/°C	反应时间/h	设置温度/°C	反应时间/h	设置温度/°C	反应时间/h	真空度/MPa
PUA⁃DA10	240	1	280	3	300	2	0.06
PUA⁃DA12	240	1	285	3	305	2	0.06
PUA⁃DmA	240	1	260	3	280	2	0.06

样品	第一阶段		第二阶段		第三阶段		真空度/MPa
样品	设置温度/°C	反应时间/h	设置温度/°C	反应时间/h	设置温度/°C	反应时间/h	真空度/MPa
PUA⁃DA10	240	1	280	3	300	2	0.06
PUA⁃DA12	240	1	285	3	305	2	0.06
PUA⁃DmA	240	1	260	3	280	2	0.06

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