Adipic acid diester plasticizers for PVC:

Example: DEHP, di-2-ethyl-hexyl phthalate ester         

Di(2-ethylhexyl) phthalate (DEHP, CAS No [117-81-7]) is also known as di-octyl phthalate (DOP). In Western Europe it accounts for 30% of all plasticiser usage and as such is generally considered as the industry standard.
Literature: T. Nørbygaard & R.W. Berg, Appl. Spectrosc. vol. 58(4), p.410-413, 2006.

Phthalic acid diester plasticizers for PVC:

Diisobutyl adipate, iso-butyl, [141-04-8], C₁₄H₂₆O₄, Sigma-Aldrich          
Diisodecyl adipate, iso-decyl, [27178-16-1], C₂₆H₅₀O₄, Sigma-Aldrich          
Diamyl adipate, iso-amyl, [14027-78-2], C₁₆H₃₀O₄, own product          
Diisopropyl adipate, iso-propyl, [6938-94-9], C₁₂H₂₂O₄, own product           
Diisononyl adipate, iso-nonyl, [33703-08-1], C₂₄H₄₆O₄, BASF          
Bis(1-butylpentyl) adipate, BBPA, [77916-77-9], C₂₄H₄₆O₄, Sigma-Aldrich           
Di-2-ethylhexyl adipate, DEHA, [103-23-1], C₂₂H₄₂O₄, (Adimoll) Bayer (Lanxess)           
Diethyl adipate, DEA, [141-28-6], C₁₀H₁₈O₄, Sigma-Aldrich          
Dimethyl adipate, DMA, [627-93-0], C₈H₁₄O₄, Sigma-Aldrich          
Dihexyl adipate, 1-hexyl, [110-33-8], C₁₈H₃₄O₄, own product          
Adipic polyester, 1,3-butylene glycol polymer, Ultramoll-III (trade name for highly viscous plasticizer), [24937-93-7] from LanXess    

R. W. Berg and A. Dopazo Otero: “Analysis of Adipate Ester Contents in Poly(Vinyl Chloride) Plastics by Means of FT-Raman Spectroscopy”. Vibrational Spectroscopy (Elsevier) 42, 222-225 (2006).

Polyvinyl chloride, (CH2CHCl)n, [9002-86-2] plastics, pure powder         
Literature: T. Nørbygaard & R.W. Berg, Appl. Spectrosc. vol. 58(4), p.410-413, 2006.

Vibrating  Chlorine  in PVC  polymer.

T. Nørbygaard and R. W. Berg: "Analysis of Phthalate Ester Content in PVC Plastics by means of FT-Raman Spectroscopy", Applied Spectroscopy, Vol. 58, No. 4, 2004 p. 410-413.

R. W. Berg and A. Dopazo Otero: “Analysis of Adipate Ester Contents in Poly(Vinyl Chloride) Plastics by Means of FT-Raman Spectroscopy”. Vibrational Spectroscopy (Elsevier) 42, 222-225 (2006).