With the continuous expansion of the global automobile fleet, there is an escalating demand to enhance and maintain current road infrastructure. Given the information provided, there will be a growing demand for bitumen, a key raw material used in the manufacturing of asphalt. Bitumen may account for up to 60% of the total usage in asphalt production. This study aims to determine the effect of different content of polylactic acid (PLA) on the change in the chemical and physical properties of biopolymer bitumen during its modification. This study was carried out by using a sample of petroleum road bitumen from CASPI BITUM (Kazakhstan) and a sample of PLA from Zhejiang Hisun (China). As a part of the research, the change of quality indicators of biopolymer bitumen when adding 4%–10% of PLA to it has been established. The results showed that the values of the average molecular weight and average molar mass increased with increasing the content of PLA in biopolymer bitumen. In particular, when the PLA content in biopolymer bitumen increased up to 10%, the average molecular weight of the biopolymer bitumen increased from 1,263 to 2,759 Mw and the average molar mass increased from 1,215 to 1,395 Mn. It was shown that increasing the PLA content in biopolymer bitumen from 0% to 10% leads to an increase in the softening temperature from 47 to 70°C or ∼ 49%. It was found that all examined samples of biopolymer bitumen are characterized by increased plasticity at 25°C (&gt;100 cm). It has been established that the addition of 8% PLA to bitumen allows one to obtain a biopolymer bitumen of optimal quality. The results obtained can be used to produce road biopolymer bitumen.

Assel Jexembayeva

Marat Konkanov

Larisa Mamedova

Lyazat Aruova

Advances in Polymer Technology

ADVANCES IN POLYMER TECHNOLOGY 发表文章，报道聚合物材料、其制造和加工、聚合物产品设计以及考虑聚合物技术的经济和环境影响的重要发展。该杂志主要面向研究人员、技术人员、工程师、顾问和生产人员。

Advances in Polymer Technology publishes articles that report significant developments in polymer materials, their manufacturing and processing, polymer product design, and the economic and environmental impacts of polymer technology. The journal primarily targets researchers, technicians, engineers, consultants, and production personnel.

《Advances in Polymer Technology》发表关于聚合物材料、制造与加工、聚合物产品设计，以及聚合物技术在经济和环境影响方面的重要发展。该杂志主要面向研究人员、技术人员、工程师、顾问和生产人员。

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

Bitumen-Biopolymer Materials Modified with Polylactic Acid with Improved Physical and Chemical Properties

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