INVESTIGATING MECHANICAL RESPONSE OF SINGLE CHAIN POLYSTYRENE PARTICLES BY SCANNING PROBE TECHNIQUES

ZHANG Qingling; DU Binyang; HE Tianbai

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INVESTIGATING MECHANICAL RESPONSE OF SINGLE CHAIN POLYSTYRENE PARTICLES BY SCANNING PROBE TECHNIQUES

Research Article | 更新时间：2021-03-19

- INVESTIGATING MECHANICAL RESPONSE OF SINGLE CHAIN POLYSTYRENE PARTICLES BY SCANNING PROBE TECHNIQUES
- Acta Polymerica Sinica Issue 5, Pages: 654-658(2000)
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- Published：20 October 2000，
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ZHANG Qingling, DU Binyang, HE Tianbai. INVESTIGATING MECHANICAL RESPONSE OF SINGLE CHAIN POLYSTYRENE PARTICLES BY SCANNING PROBE TECHNIQUES. [J]. Acta Polymerica Sinica (5):654-658(2000)
DOI：

ZHANG Qingling, DU Binyang, HE Tianbai. INVESTIGATING MECHANICAL RESPONSE OF SINGLE CHAIN POLYSTYRENE PARTICLES BY SCANNING PROBE TECHNIQUES. [J]. Acta Polymerica Sinica (5):654-658(2000) DOI：

摘要

首先通过极稀溶液滴膜的方法得到了聚苯乙烯的单链颗粒

之后

采用稍深溶液得到了既有单链聚苯乙烯颗粒又有多链（上千根）聚苯乙烯颗粒的样品

力调制技术显示单链聚苯乙烯颗粒比多链聚苯乙烯颗粒软；另一方面

对多链聚苯乙烯颗粒和聚苯乙烯本体的纳米压印实验结果表明二者的模量是近似的

因此

可以得出单链聚苯乙烯颗粒比本体聚苯乙烯软

这说明存在于聚苯乙烯单链颗粒中的分子链内的缠结点密度不如存在于人本体中的分子链间的缠结点密度大。

Abstract

Single chain polystyrene particles were obtained by dilute solution casting method.The sample with both single chain polystyrene particles and multi-chain (more than 1000 molecular chains) polystyrene particles was obtained by a little more concentrate solution.Force modulation technique showed that single chain polystyrene particles were softer than multichain polystyrene particles.On the other hand

nanoindentation experiments on multi-chain particles and bulk polystyrene manifested that the elastic modulus of multi-chain polystyrene particles was very close to that of bulk polystyrene.Therefore

it was concluded that single chain polystyrene particles were softer than bulk polystyrene

which indicated that the desity of intrachain entanglement points in the single chain polystyrene particles was not as large as that of the interchain entang lement points in the bulk sate.

关键词

聚苯乙烯单链颗粒扫描探针技术力学响应力调制纳米压印

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