Enhancing flexibility and durability of PVC with liquid epoxidized natural rubber: Innovative UV treatment to mitigate plasticizer migration

IF 3.8 4区工程技术 Q2 CHEMISTRY, APPLIED Journal of Vinyl & Additive Technology Pub Date : 2024-08-18 DOI:10.1002/vnl.22147

Jin Jing Liew, Nurul Hayati Yusof, Desmond Teck-Chye Ang

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引用次数: 0

Abstract

This manuscript elucidates the preparation and utilization of liquid epoxidized natural rubber (LENR) with 50 mol% epoxidation level (LENR50) as a polymeric plasticizer for poly(vinyl chloride) (PVC), and further immobilization of the plasticizer in the plastic matrix through subsequent ultraviolet (UV)-curing treatment. The plasticizing effect induced by LENR50 at 50 wt% loading was evident with a reduction of T_g from a high of 72.0 to 11.4°C. Positive enhancements were also documented in the mechanical properties of the LENR50-plasticized PVC, specifically the big improvement in elongation at break and elastic modulus, from 106% to 430%, and from 646 to 7 MPa, respectively. The UV-treated PVC/LENR film also exhibited superior resistance to migration compared with formulations with conventional plasticizers such as di-2-ethylhexyl phthalate (DEHP) and triethyl-2-acetyl citrate (ATEC). A similar outcome was recorded in the leaching resistance test, where LENR50 had the best resistance to leaching in four different solvents (water, soap solution, ethanol, and toluene). The LENR50-plasticized PVC film recorded the lowest weight loss following 24 h immersion in both hydrophilic and lipophilic solvents. The findings from this study suggest that LENR50 could serve as an efficient bio-based polymeric plasticizer for PVC.

Highlights

LENR as bio-based polymeric plasticizer for PVC.
Significant reduction in T_g and elastic modulus of PVC plasticized with LENR.
UV treatment improved tensile strength and elongation at break of LENR/PVC film.
UV-treated PVC/LENR has superior plasticizer migration and leaching resistance.

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用液态环氧化天然橡胶增强聚氯乙烯的柔韧性和耐久性：减轻增塑剂迁移的创新型紫外线处理方法

本手稿阐明了如何制备和利用环氧化水平为 50 mol% 的液态环氧化天然橡胶（LENR）（LENR50）作为聚氯乙烯（PVC）的聚合物增塑剂，并通过随后的紫外线（UV）固化处理进一步将增塑剂固定在塑料基体中。当 LENR50 的添加量达到 50 wt% 时，其增塑效果非常明显，Tg 从 72.0°C 的高点降至 11.4°C。LENR50 塑化聚氯乙烯的机械性能也得到了积极改善，特别是断裂伸长率和弹性模量有了大幅提高，分别从 106% 提高到 430%，以及从 646 兆帕提高到 7 兆帕。与使用邻苯二甲酸二-2-乙基己酯（DEHP）和柠檬酸三乙酯-2-乙酰酯（ATEC）等传统增塑剂的配方相比，经过紫外线处理的 PVC/LENR 薄膜还具有更出色的抗迁移性。在耐浸出性测试中也取得了类似的结果，LENR50 在四种不同溶剂（水、肥皂溶液、乙醇和甲苯）中的耐浸出性最好。在亲水性和亲油性溶剂中浸泡 24 小时后，LENR50 塑化 PVC 薄膜的重量损失最小。本研究的结果表明，LENR50 可作为一种高效的生物基聚合增塑剂用于 PVC。用 LENR 塑化的 PVC 的 Tg 和弹性模量显著降低。紫外线处理提高了 LENR/PVC 薄膜的拉伸强度和断裂伸长率。经紫外线处理的 PVC/LENR 具有优异的增塑剂迁移性和抗浸出性。

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来源期刊

Journal of Vinyl & Additive Technology 工程技术-材料科学：纺织

CiteScore

5.40

自引率

14.80%

发文量

审稿时长

>12 weeks

期刊介绍： Journal of Vinyl and Additive Technology is a peer-reviewed technical publication for new work in the fields of polymer modifiers and additives, vinyl polymers and selected review papers. Over half of all papers in JVAT are based on technology of additives and modifiers for all classes of polymers: thermoset polymers and both condensation and addition thermoplastics. Papers on vinyl technology include PVC additives.