文章信息/Info

Title:

Preparation and Characterization of Long Chain Branching Poly(Butylene Carbonate)

作者:

林珊珊; 俞 煒; 周持興

上海交通大學 化學化工學院流變學研究所，上海 200240

Author(s):

LIN Shanshan;  YU Wei;  ZHOU Chixing

Advanced Rheology Institute, Department of Polymer Science and Engineering,

Shanghai Jiao Tong University, Shanghai 200240, China

關鍵詞:

聚碳酸丁二酯; 長支鏈; 流變學

DOI:

10.7502/j.issn.1674-3962.2014.04.06

文獻標志碼:

A

摘要:

脂肪族聚碳酸丁二酯是一種有著廣泛應用前景的生物可降解材料，但是材料在加工過程中發生的熱降解反應及材料本身存在的熔體強度低、拉伸強度低等缺陷卻大大限制了其應用。因此，本文采用反應加工的方式對聚碳酸丁二酯進行改性，通過在共混體系內加入多官能團單體的方法來制備長支化的聚碳酸酯丁二酯。本文探索出了一種用酸酐類和環氧類多官能單體聯用的方法，制備得到了高支化度、高分子量的聚碳酸丁二酯，并通過凝膠滲透色譜儀（GPC）及流變學方法表征了長支化結構的產生，并推測了制備長支化聚碳酸丁二酯的官能團反應過程及可能出現的支化結構。研究結果表明，與未改性的聚碳酸丁二酯相比，改性后的樣品力學性能得到明顯改善，而采用多官能單體聯用的方法制備得到的長支化樣品的力學性能最優。

Abstract:

Aliphatic poly(butylene carbonate) (PBC) is a kind of biodegradable materials which has a broad application prospects, but the thermal degradation, low melt strength during processing has greatly limited its application. Therefore, in this paper long chain branching (LCB) poly(butylene carbonate) (PBC) was prepared by reactive processing using multi-functional monomers blending. LCB PBC with high molecular weight and long branch was successfully prepared by the successive reactions of the end hydroxyl groups of PBC with pyromellitic dianhydride (PMDA) and triglycidyl isocyanurate (TGIC). Gel permeation chromatography (GPC) and rheology were adopted to characterize the structures of LCB PBC. The reaction mechanism was also suggested.The research results showed that modified PBC samples had better mechanicalproperties, and the properties of LCB PBC are the best.

Key words:poly(butylene carbonate); long chain branching;rheology