NIMTE OpenIR  > 2018专题
Identification of side chain effect as an important factor influencing the secondary relaxation of polyesters containing cyclohexylene ring
Chi, Dequan; Liu, Fei; Hao, Chuncheng; Chen, Jing; Na, Haining; Zhu, Jin
2018
Source PublicationJOURNAL OF MATERIALS SCIENCE
Volume53Issue:8Pages:6239-6250
AbstractThe conformational transition of cyclohexylene ring has been recognized as the secondary transition of polyesters containing this aliphatic ring structure. Previously, the stereochemistry, i.e., trans/cis ratio, has been identified as an important factor that has a significant impact on the conformational transition of the cyclohexylene ring. In this paper, we have proposed and proved the side chain effect as another important factor that plays the same role as the stereochemistry, due to the fact that the conformational transition of the ring is usually associated with the coupled motion of it with neighboring unit. Our strategy is to design and synthesize a series of polyesters with 1,4-cyclohexanedicarboxylic acid and diols with different side chains. Polyester without any side chain has the lowest secondary relaxation temperature (T (beta) ). Incorporation of asymmetric short side chain will result in increased T (beta) , since it will reduce the coupled motion of the neighboring unit with the cyclohexylene ring during the conformational transition process, and thus reduces the flexibility of the chain and increases steric hindrance. However, further incorporation of long side chain will result in decreased T (beta) because of the plasticization effect. Moreover, we also found that polyesters with low T (beta) tend to have not only better impact strength, but also good ductility and elasticity. Our study enables people to take advantage of the cyclohexylene ring structure for the design and synthesis of thermoplastic and elastomer with better performance.
KeywordGlassy Poly(Ester Carbonate)s T-g Polymers Mechanical-properties Aliphatic Copolyesters Poly(Butylene 1 Molecular-structure 4-cyclohexanedicarboxylate) Thermal-properties Copolymer Glasses Behavior Backbone
Subject AreaMaterials Science
Language英语
Document Type期刊论文
Identifierhttp://ir.nimte.ac.cn/handle/174433/16739
Collection2018专题
Recommended Citation
GB/T 7714
Chi, Dequan,Liu, Fei,Hao, Chuncheng,et al. Identification of side chain effect as an important factor influencing the secondary relaxation of polyesters containing cyclohexylene ring[J]. JOURNAL OF MATERIALS SCIENCE,2018,53(8):6239-6250.
APA Chi, Dequan,Liu, Fei,Hao, Chuncheng,Chen, Jing,Na, Haining,&Zhu, Jin.(2018).Identification of side chain effect as an important factor influencing the secondary relaxation of polyesters containing cyclohexylene ring.JOURNAL OF MATERIALS SCIENCE,53(8),6239-6250.
MLA Chi, Dequan,et al."Identification of side chain effect as an important factor influencing the secondary relaxation of polyesters containing cyclohexylene ring".JOURNAL OF MATERIALS SCIENCE 53.8(2018):6239-6250.
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