This study focuses on comprehensively investigating polyethylene glycol (PEG) with different molecular weight. Thermal properties of the PEGs were investigated by differential scanning calorimetry (DSC), as well as gradual melting and freezing tests with thermocouples. Results show that the degree of PEG crystallization increased with the increasing of the molecular weight of polymers. The temperatures of pure PEG 1000 and PEG 1000‐PEG 600 blends ranged from 20 to 50°C. The apparent activation energy of pure PEG1000 was 300 kJ/mol, whereas that of the PEG blend was 239 kJ/mol. During the crystallization process, Avrami index n ranged from 5 to 3 and half‐crystallization time t 1/2 decreased with the acceleration of the crystallization rate R . This difference was due to the increase in polydispersity of the PEG system and decrease in the degree of crystallization. POLYM. ENG. SCI., 54:2872–2876, 2014. © 2014 Society of Plastics Engineers

Ting Wei

Baicun Zheng

Hongling Yi

Yanfeng Gao

Weihong Guo

Polymer Engineering and Science

30 多年来，POLYMER ENGINEERING & SCIENCE 一直是该领域最受推崇的期刊之一，是聚合物科学和技术前沿论文作者的论坛。 PE&S 的重要性体现在其文章被引用的频率上，尤其是被其他出版物引用的频率——实际上每年数千次。世界各地的工程师、研究人员、技术人员和院士都在向 PE&S 寻求他们需要的宝贵信息。特刊由特邀客座编辑编撰。其中包含关于聚合物混合物、塑料力学和聚合物焊接等不同主题的专题讨论会。

POLYMER ENGINEERING & SCIENCE has been one of the most respected journals in the field of polymer science and technology for over 30 years. It serves as a vital platform for authors of cutting-edge papers in polymer science and technology, with articles being cited frequently, particularly by other publications—amounting to thousands of citations each year. Engineers, researchers, technicians, and scholars from around the world turn to POLYMER ENGINEERING & SCIENCE for the valuable information they need. Special issues are curated by invited guest editors and include thematic discussions on various topics such as polymer blends, plastic mechanics, and polymer welding.

POLYMER ENGINEERING & SCIENCE（聚合物工程与科学）是聚合物科学与技术领域最受尊敬的期刊之一，已有30多年历史。该期刊为聚合物科学和技术的前沿研究提供了一个重要的平台，发表的论文被广泛引用，尤其是被其他出版物引用的频率，每年达到数千次。来自全球的工程师、研究人员、技术人员和学者都在向POLYMER ENGINEERING & SCIENCE寻求宝贵的信息。特刊由特邀客座编辑编撰，涵盖聚合物混合物、塑料力学和聚合物焊接等多个主题的专题讨论。

Category	Quartile
工程技术	4
工程技术, 工程化工	3
工程技术, 高分子科学	3

Thermal analysis and non‐isothermal kinetics of poly(ethylene glycol) with different molecular weight

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