Table 2.

Reported studies of the mechanical properties of RH reinforced polymers.

Matrix	Parametric Study	Tensile Strength (MPa)	Flexural (MPa)	Impact Strength (kJ/m2)	References
HDPE	Matrix modification	22.5 ± 0.5	49.6 ± 1.2		Abdulkarem et al. [16]
PP	Filler loading	19.7	39.2		Zafar et al. [17]
HDPE	Filler modification	20	53.7	13	Zhang et al. [18]
HDPE	Hybrid	15.8	25.7	15.2	Zhang et al. [19]
Natural rubber	Filler modification	21.3 ± 0.7			Xue et al. [20]
Epoxy	Filler modification	120			Fernandes et al. [21]
Epoxidized natural rubber	Filler modification	18.5 ± 0.5			Pongdong et al. [22]
HDPE/PET	Matrix modification	22.2 ± 0.1	48 ± 2	3 ± 0.1	Chen et al. [23]
Epoxidized natural rubber	Matrix modification	35	45	22	Raghu et al. [24]
rHDPE	Filler treatment	18.37			Rajendran et al. [25]
Epoxy	Filler treatment	46 ± 1	87 ± 2	2.7 ± 0.1	Bisht et al. [26]
rABS/PP	Matrix modification	21 ± 1			Santiago et al. [27]
HDPE	Filler treatment	26.3 ± 0.50			Zhang et al. [28]
rPP	Filler treatment	28 ± 0.25		3.0 ± 0.5	Moreno et al. [29]
TPS	Filler treatment	2.43 ± 0.25			Boonsuk et al. [30]
PU	Filler treatment	0.25 ± 0.11			Olcay et al. [31]
Epoxy	Hybrid	43			Shubbar [32]
PP	Hybrid	40 ± 2			Awang et al. [33]
Epoxy	Hybrid	30 ± 2	25 ± 2		Kumar et al. [34]
PP	Filler loading	33.2 ± 0.5	39.8 ± 0.3		Hidalgo-Salazar et al. [35]
Corn starch	Hybrid	10.7	19.6		Singh et al. [36]
HDPE	Matrix modification		30 ± 2		Sun et al. [37]
PLA	Matrix modification		5254 ± 25		Běhálek et al. [38]
PP	Hybrid	15.6 ± 0.25	37.6 ± 1.88		Guna et al. [39]
PVC	Matrix modification	51.9 ± 2.54		74.9 ± 5.81	Petchwattana et al. [40]
PVC	Hybrid			5.5 ± 0.80	Jiang et al. [41]
Cassava starch	Filler modification	3.3 ± 0.5			Kargarzadeh et al. [42]
Corn starch	Matrix modification	14.3 ± 1.13			Yap et al. [43]
PLA and PBAT	Matrix modification		10.0 ± 1.0		Spada et al. [44]