Identification of side chain effect as an important factor influencing the secondary relaxation of polyesters containing cyclohexylene ring

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2018专题

	Identification of side chain effect as an important factor influencing the secondary relaxation of polyesters containing cyclohexylene ring
	Hao, Chuncheng; Chi, Dequan; Liu, Fei; Chen, Jing; Na, Haining; Zhu, Jin
刊名	JOURNAL OF MATERIALS SCIENCE
	2018
卷号	53 期号:8 页码:6239-6250
关键词	Glassy Poly(Ester Carbonate)s T-g Polymers Mechanical-properties Aliphatic Copolyesters Poly(Butylene 1 Molecular-structure 4-cyclohexanedicarboxylate) Thermal-properties Copolymer Glasses Behavior Backbone
英文摘要	The 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.
学科主题	Materials Science
语种	英语
公开日期	2018-12-04
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/16739]
专题	2018专题
推荐引用方式 GB/T 7714	Hao, Chuncheng,Chi, Dequan,Liu, Fei,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	Hao, Chuncheng,Chi, Dequan,Liu, Fei,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	Hao, Chuncheng,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.