Effect of side methyl groups of polymer glycol on elongation-induced crystallization behavior of polyurethane elastomers
Effect of side methyl groups of polymer glycol on elongation-induced crystallization behavior of polyurethane elastomers
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DOI：
10.1016/j.polymer.2004.09.061
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发表时间：
2004-11-11
期刊：
影响因子：
4.6
通讯作者：
Furukawa, M
中科院分区：
文献类型：
--
作者：
Kojio, K;Nakamura, S;Furukawa, M
研究了在拉伸和不拉伸条件下，软段侧基甲基和二甲基对聚氨酯弹性体性能的影响。使用的聚合物二醇是聚（氧四亚甲基）二醇（PTMG）、具有二甲基基团的PTMG（PTG-X）和具有甲基基团的PTMG（PTG-L）。随着甲基含量的增加，聚氨酯弹性体的相分离变弱。拉伸试验表明，随着甲基含量的增加，聚氨酯弹性体的强度降低，强度降低。PTMG基聚氨酯弹性体在拉伸过程中表现出明显的拉伸诱导结晶。相比之下，对于基于PTG-L和PTG-X的PUE，结晶度随着侧甲基含量的增加而降低，并且具有最高甲基含量的PTG-L和PTG-X的PUE不结晶。通过引入侧甲基，成功地控制了弹性体在拉伸条件下的结晶行为。(C)2004爱思唯尔有限公司保留所有权利。
Effect of side methyl and dimethyl groups of soft segment component on polyurethane elastomers (PUEs) was investigated with and without elongation. The polymer glycols used were poly(oxytetramethylene) glycol (PTMG), PTMG with dimethyl groups (PTG-X) and methyl groups (PTG-L). Phase separation of the PUEs became weaker with an increasing methyl group content. Tensile test revealed that the increasing methyl group concentration made the PUEs be soften and weaken. The PTMG based PUEs obviously exhibited elongation-induced crystallization during elongation process. In contrast, for the PTG-L and PTG-X based PUEs, crystallinity decreased with an increasing side methyl group content, and the PUEs with PTG-L and PTG-X with highest methyl group content did not crystallize. We succeeded the control of the crystallization behavior of elastomers under an elongation by the introduction of side methyl groups. (C) 2004 Elsevier Ltd. All rights reserved.